cb8b19939d
Screen magnification is the compositor's business, not that of "random" unprivileged tools. And for cases where a more specialised behavior is wanted, an extension likely does a better job than a consumer of the D-Bus API. In addition to that, exporting the interface has been broken for an unknown time, because the object that holds the implementation isn't referenced and thus ends up being garbage collected, whoops. And last but not least, this gets rid of the last public D-Bus name that isn't clearly in the system namespace (org.gnome.Shell, org.gnome.Mutter, org.gtk). https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3452 Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1523>
1970 lines
68 KiB
JavaScript
1970 lines
68 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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const { Atspi, Clutter, GDesktopEnums,
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Gio, GLib, GObject, Meta, Shell, St } = imports.gi;
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const Signals = imports.signals;
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const Background = imports.ui.background;
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const FocusCaretTracker = imports.ui.focusCaretTracker;
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const Main = imports.ui.main;
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const Params = imports.misc.params;
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const PointerWatcher = imports.ui.pointerWatcher;
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var CROSSHAIRS_CLIP_SIZE = [100, 100];
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var NO_CHANGE = 0.0;
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var POINTER_REST_TIME = 1000; // milliseconds
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// Settings
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const MAGNIFIER_SCHEMA = 'org.gnome.desktop.a11y.magnifier';
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const SCREEN_POSITION_KEY = 'screen-position';
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const MAG_FACTOR_KEY = 'mag-factor';
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const INVERT_LIGHTNESS_KEY = 'invert-lightness';
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const COLOR_SATURATION_KEY = 'color-saturation';
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const BRIGHT_RED_KEY = 'brightness-red';
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const BRIGHT_GREEN_KEY = 'brightness-green';
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const BRIGHT_BLUE_KEY = 'brightness-blue';
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const CONTRAST_RED_KEY = 'contrast-red';
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const CONTRAST_GREEN_KEY = 'contrast-green';
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const CONTRAST_BLUE_KEY = 'contrast-blue';
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const LENS_MODE_KEY = 'lens-mode';
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const CLAMP_MODE_KEY = 'scroll-at-edges';
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const MOUSE_TRACKING_KEY = 'mouse-tracking';
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const FOCUS_TRACKING_KEY = 'focus-tracking';
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const CARET_TRACKING_KEY = 'caret-tracking';
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const SHOW_CROSS_HAIRS_KEY = 'show-cross-hairs';
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const CROSS_HAIRS_THICKNESS_KEY = 'cross-hairs-thickness';
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const CROSS_HAIRS_COLOR_KEY = 'cross-hairs-color';
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const CROSS_HAIRS_OPACITY_KEY = 'cross-hairs-opacity';
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const CROSS_HAIRS_LENGTH_KEY = 'cross-hairs-length';
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const CROSS_HAIRS_CLIP_KEY = 'cross-hairs-clip';
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var MouseSpriteContent = GObject.registerClass({
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Implements: [Clutter.Content],
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}, class MouseSpriteContent extends GObject.Object {
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_init() {
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super._init();
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this._texture = null;
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}
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vfunc_get_preferred_size() {
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if (!this._texture)
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return [false, 0, 0];
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return [true, this._texture.get_width(), this._texture.get_height()];
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}
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vfunc_paint_content(actor, node, _paintContext) {
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if (!this._texture)
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return;
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let color = Clutter.Color.get_static(Clutter.StaticColor.WHITE);
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let [minFilter, magFilter] = actor.get_content_scaling_filters();
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let textureNode = new Clutter.TextureNode(this._texture,
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color, minFilter, magFilter);
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textureNode.set_name('MouseSpriteContent');
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node.add_child(textureNode);
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textureNode.add_rectangle(actor.get_content_box());
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}
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get texture() {
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return this._texture;
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}
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set texture(coglTexture) {
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if (this._texture == coglTexture)
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return;
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let oldTexture = this._texture;
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this._texture = coglTexture;
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this.invalidate();
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if (!oldTexture || !coglTexture ||
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oldTexture.get_width() != coglTexture.get_width() ||
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oldTexture.get_height() != coglTexture.get_height())
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this.invalidate_size();
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}
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});
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var Magnifier = class Magnifier {
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constructor() {
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// Magnifier is a manager of ZoomRegions.
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this._zoomRegions = [];
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// Create small clutter tree for the magnified mouse.
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let cursorTracker = Meta.CursorTracker.get_for_display(global.display);
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this._cursorTracker = cursorTracker;
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this._mouseSprite = new Clutter.Actor({ request_mode: Clutter.RequestMode.CONTENT_SIZE });
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this._mouseSprite.content = new MouseSpriteContent();
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this._cursorRoot = new Clutter.Actor();
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this._cursorRoot.add_actor(this._mouseSprite);
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// Create the first ZoomRegion and initialize it according to the
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// magnification settings.
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[this.xMouse, this.yMouse] = global.get_pointer();
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let aZoomRegion = new ZoomRegion(this, this._cursorRoot);
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this._zoomRegions.push(aZoomRegion);
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this._settingsInit(aZoomRegion);
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aZoomRegion.scrollContentsTo(this.xMouse, this.yMouse);
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St.Settings.get().connect('notify::magnifier-active', () => {
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this.setActive(St.Settings.get().magnifier_active);
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});
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this.setActive(St.Settings.get().magnifier_active);
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}
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/**
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* showSystemCursor:
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* Show the system mouse pointer.
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*/
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showSystemCursor() {
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const seat = Clutter.get_default_backend().get_default_seat();
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if (seat.is_unfocus_inhibited())
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seat.uninhibit_unfocus();
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this._cursorTracker.set_pointer_visible(true);
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}
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/**
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* hideSystemCursor:
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* Hide the system mouse pointer.
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*/
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hideSystemCursor() {
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const seat = Clutter.get_default_backend().get_default_seat();
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if (!seat.is_unfocus_inhibited())
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seat.inhibit_unfocus();
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this._cursorTracker.set_pointer_visible(false);
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}
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/**
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* setActive:
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* Show/hide all the zoom regions.
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* @param {bool} activate: Boolean to activate or de-activate the magnifier.
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*/
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setActive(activate) {
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let isActive = this.isActive();
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this._zoomRegions.forEach(zoomRegion => {
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zoomRegion.setActive(activate);
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});
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if (isActive === activate)
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return;
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if (activate) {
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this._updateMouseSprite();
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this._cursorSpriteChangedId =
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this._cursorTracker.connect('cursor-changed',
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this._updateMouseSprite.bind(this));
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Meta.disable_unredirect_for_display(global.display);
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this.startTrackingMouse();
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} else {
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this._cursorTracker.disconnect(this._cursorSpriteChangedId);
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this._mouseSprite.content.texture = null;
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Meta.enable_unredirect_for_display(global.display);
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this.stopTrackingMouse();
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}
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// Make sure system mouse pointer is shown when all zoom regions are
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// invisible.
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if (!activate)
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this.showSystemCursor();
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// Notify interested parties of this change
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this.emit('active-changed', activate);
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}
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/**
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* isActive:
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* @returns {bool} Whether the magnifier is active.
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*/
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isActive() {
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// Sufficient to check one ZoomRegion since Magnifier's active
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// state applies to all of them.
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if (this._zoomRegions.length == 0)
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return false;
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else
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return this._zoomRegions[0].isActive();
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}
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/**
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* startTrackingMouse:
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* Turn on mouse tracking, if not already doing so.
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*/
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startTrackingMouse() {
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if (!this._pointerWatch) {
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let interval = 1000 / Clutter.get_default_frame_rate();
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this._pointerWatch = PointerWatcher.getPointerWatcher().addWatch(interval, this.scrollToMousePos.bind(this));
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}
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}
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/**
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* stopTrackingMouse:
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* Turn off mouse tracking, if not already doing so.
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*/
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stopTrackingMouse() {
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if (this._pointerWatch)
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this._pointerWatch.remove();
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this._pointerWatch = null;
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}
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/**
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* isTrackingMouse:
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* @returns {bool} whether the magnifier is currently tracking the mouse
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*/
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isTrackingMouse() {
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return !!this._mouseTrackingId;
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}
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/**
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* scrollToMousePos:
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* Position all zoom regions' ROI relative to the current location of the
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* system pointer.
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* @returns {bool} true.
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*/
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scrollToMousePos() {
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let [xMouse, yMouse] = global.get_pointer();
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if (xMouse != this.xMouse || yMouse != this.yMouse) {
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this.xMouse = xMouse;
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this.yMouse = yMouse;
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let sysMouseOverAny = false;
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this._zoomRegions.forEach(zoomRegion => {
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if (zoomRegion.scrollToMousePos())
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sysMouseOverAny = true;
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});
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if (sysMouseOverAny)
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this.hideSystemCursor();
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else
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this.showSystemCursor();
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}
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return true;
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}
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/**
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* createZoomRegion:
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* Create a ZoomRegion instance with the given properties.
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* @param {number} xMagFactor:
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* The power to set horizontal magnification of the ZoomRegion. A value
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* of 1.0 means no magnification, a value of 2.0 doubles the size.
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* @param {number} yMagFactor:
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* The power to set the vertical magnification of the ZoomRegion.
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* @param {{x: number, y: number, width: number, height: number}} roi:
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* The reg Object that defines the region to magnify, given in
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* unmagnified coordinates.
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* @param {{x: number, y: number, width: number, height: number}} viewPort:
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* Object that defines the position of the ZoomRegion on screen.
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* @returns {ZoomRegion} the newly created ZoomRegion.
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*/
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createZoomRegion(xMagFactor, yMagFactor, roi, viewPort) {
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let zoomRegion = new ZoomRegion(this, this._cursorRoot);
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zoomRegion.setViewPort(viewPort);
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// We ignore the redundant width/height on the ROI
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let fixedROI = Object.create(roi);
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fixedROI.width = viewPort.width / xMagFactor;
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fixedROI.height = viewPort.height / yMagFactor;
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zoomRegion.setROI(fixedROI);
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zoomRegion.addCrosshairs(this._crossHairs);
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return zoomRegion;
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}
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/**
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* addZoomRegion:
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* Append the given ZoomRegion to the list of currently defined ZoomRegions
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* for this Magnifier instance.
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* @param {ZoomRegion} zoomRegion: The zoomRegion to add.
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*/
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addZoomRegion(zoomRegion) {
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if (zoomRegion) {
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this._zoomRegions.push(zoomRegion);
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if (!this.isTrackingMouse())
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this.startTrackingMouse();
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}
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}
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/**
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* getZoomRegions:
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* Return a list of ZoomRegion's for this Magnifier.
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* @returns {number[]} The Magnifier's zoom region list.
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*/
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getZoomRegions() {
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return this._zoomRegions;
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}
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/**
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* clearAllZoomRegions:
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* Remove all the zoom regions from this Magnfier's ZoomRegion list.
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*/
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clearAllZoomRegions() {
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for (let i = 0; i < this._zoomRegions.length; i++)
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this._zoomRegions[i].setActive(false);
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this._zoomRegions.length = 0;
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this.stopTrackingMouse();
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this.showSystemCursor();
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}
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/**
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* addCrosshairs:
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* Add and show a cross hair centered on the magnified mouse.
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*/
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addCrosshairs() {
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if (!this._crossHairs)
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this._crossHairs = new Crosshairs();
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let thickness = this._settings.get_int(CROSS_HAIRS_THICKNESS_KEY);
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let color = this._settings.get_string(CROSS_HAIRS_COLOR_KEY);
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let opacity = this._settings.get_double(CROSS_HAIRS_OPACITY_KEY);
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let length = this._settings.get_int(CROSS_HAIRS_LENGTH_KEY);
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let clip = this._settings.get_boolean(CROSS_HAIRS_CLIP_KEY);
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this.setCrosshairsThickness(thickness);
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this.setCrosshairsColor(color);
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this.setCrosshairsOpacity(opacity);
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this.setCrosshairsLength(length);
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this.setCrosshairsClip(clip);
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let theCrossHairs = this._crossHairs;
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this._zoomRegions.forEach(zoomRegion => {
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zoomRegion.addCrosshairs(theCrossHairs);
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});
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}
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/**
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* setCrosshairsVisible:
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* Show or hide the cross hair.
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* @param {bool} visible: Flag that indicates show (true) or hide (false).
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*/
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setCrosshairsVisible(visible) {
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if (visible) {
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if (!this._crossHairs)
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this.addCrosshairs();
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this._crossHairs.show();
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} else {
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// eslint-disable-next-line no-lonely-if
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if (this._crossHairs)
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this._crossHairs.hide();
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}
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}
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/**
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* setCrosshairsColor:
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* Set the color of the crosshairs for all ZoomRegions.
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* @param {string} color: The color as a string, e.g. '#ff0000ff' or 'red'.
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*/
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setCrosshairsColor(color) {
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if (this._crossHairs) {
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let [res_, clutterColor] = Clutter.Color.from_string(color);
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this._crossHairs.setColor(clutterColor);
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}
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}
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/**
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* getCrosshairsColor:
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* Get the color of the crosshairs.
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* @returns {string} The color as a string, e.g. '#0000ffff' or 'blue'.
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*/
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getCrosshairsColor() {
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if (this._crossHairs) {
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let clutterColor = this._crossHairs.getColor();
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return clutterColor.to_string();
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} else {
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return '#00000000';
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}
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}
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/**
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* setCrosshairsThickness:
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* Set the crosshairs thickness for all ZoomRegions.
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* @param {number} thickness: The width of the vertical and
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* horizontal lines of the crosshairs.
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*/
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setCrosshairsThickness(thickness) {
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if (this._crossHairs)
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this._crossHairs.setThickness(thickness);
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}
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/**
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* getCrosshairsThickness:
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* Get the crosshairs thickness.
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* @returns {number} The width of the vertical and horizontal
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* lines of the crosshairs.
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*/
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getCrosshairsThickness() {
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if (this._crossHairs)
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return this._crossHairs.getThickness();
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else
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return 0;
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}
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/**
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* setCrosshairsOpacity:
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* @param {number} opacity: Value between 0.0 (transparent)
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* and 1.0 (fully opaque).
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*/
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setCrosshairsOpacity(opacity) {
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if (this._crossHairs)
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this._crossHairs.setOpacity(opacity * 255);
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}
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/**
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* getCrosshairsOpacity:
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* @returns {number} Value between 0.0 (transparent) and 1.0 (fully opaque).
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*/
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getCrosshairsOpacity() {
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if (this._crossHairs)
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return this._crossHairs.getOpacity() / 255.0;
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else
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return 0.0;
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}
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/**
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* setCrosshairsLength:
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* Set the crosshairs length for all ZoomRegions.
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* @param {number} length: The length of the vertical and horizontal
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* lines making up the crosshairs.
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*/
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setCrosshairsLength(length) {
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if (this._crossHairs) {
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let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
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this._crossHairs.setLength(length / scaleFactor);
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}
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}
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/**
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* getCrosshairsLength:
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* Get the crosshairs length.
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* @returns {number} The length of the vertical and horizontal
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* lines making up the crosshairs.
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*/
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getCrosshairsLength() {
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if (this._crossHairs)
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return this._crossHairs.getLength();
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else
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return 0;
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}
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/**
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* setCrosshairsClip:
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* Set whether the crosshairs are clipped at their intersection.
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* @param {bool} clip: Flag to indicate whether to clip the crosshairs.
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*/
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setCrosshairsClip(clip) {
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if (!this._crossHairs)
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return;
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// Setting no clipping on crosshairs means a zero sized clip rectangle.
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this._crossHairs.setClip(clip ? CROSSHAIRS_CLIP_SIZE : [0, 0]);
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}
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/**
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* getCrosshairsClip:
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* Get whether the crosshairs are clipped by the mouse image.
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* @returns {bool} Whether the crosshairs are clipped.
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*/
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getCrosshairsClip() {
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if (this._crossHairs) {
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let [clipWidth, clipHeight] = this._crossHairs.getClip();
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return clipWidth > 0 && clipHeight > 0;
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} else {
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return false;
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}
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}
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// Private methods //
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_updateMouseSprite() {
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this._updateSpriteTexture();
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let [xHot, yHot] = this._cursorTracker.get_hot();
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this._mouseSprite.set({
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translation_x: -xHot,
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translation_y: -yHot,
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});
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}
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_updateSpriteTexture() {
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let sprite = this._cursorTracker.get_sprite();
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if (sprite) {
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this._mouseSprite.content.texture = sprite;
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this._mouseSprite.show();
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} else {
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this._mouseSprite.hide();
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}
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}
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_settingsInit(zoomRegion) {
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this._settings = new Gio.Settings({ schema_id: MAGNIFIER_SCHEMA });
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this._settings.connect(`changed::${SCREEN_POSITION_KEY}`,
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this._updateScreenPosition.bind(this));
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this._settings.connect(`changed::${MAG_FACTOR_KEY}`,
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this._updateMagFactor.bind(this));
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this._settings.connect(`changed::${LENS_MODE_KEY}`,
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this._updateLensMode.bind(this));
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this._settings.connect(`changed::${CLAMP_MODE_KEY}`,
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this._updateClampMode.bind(this));
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this._settings.connect(`changed::${MOUSE_TRACKING_KEY}`,
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this._updateMouseTrackingMode.bind(this));
|
|
this._settings.connect(`changed::${FOCUS_TRACKING_KEY}`,
|
|
this._updateFocusTrackingMode.bind(this));
|
|
this._settings.connect(`changed::${CARET_TRACKING_KEY}`,
|
|
this._updateCaretTrackingMode.bind(this));
|
|
|
|
this._settings.connect(`changed::${INVERT_LIGHTNESS_KEY}`,
|
|
this._updateInvertLightness.bind(this));
|
|
this._settings.connect(`changed::${COLOR_SATURATION_KEY}`,
|
|
this._updateColorSaturation.bind(this));
|
|
|
|
this._settings.connect(`changed::${BRIGHT_RED_KEY}`,
|
|
this._updateBrightness.bind(this));
|
|
this._settings.connect(`changed::${BRIGHT_GREEN_KEY}`,
|
|
this._updateBrightness.bind(this));
|
|
this._settings.connect(`changed::${BRIGHT_BLUE_KEY}`,
|
|
this._updateBrightness.bind(this));
|
|
|
|
this._settings.connect(`changed::${CONTRAST_RED_KEY}`,
|
|
this._updateContrast.bind(this));
|
|
this._settings.connect(`changed::${CONTRAST_GREEN_KEY}`,
|
|
this._updateContrast.bind(this));
|
|
this._settings.connect(`changed::${CONTRAST_BLUE_KEY}`,
|
|
this._updateContrast.bind(this));
|
|
|
|
this._settings.connect(`changed::${SHOW_CROSS_HAIRS_KEY}`, () => {
|
|
this.setCrosshairsVisible(this._settings.get_boolean(SHOW_CROSS_HAIRS_KEY));
|
|
});
|
|
|
|
this._settings.connect(`changed::${CROSS_HAIRS_THICKNESS_KEY}`, () => {
|
|
this.setCrosshairsThickness(this._settings.get_int(CROSS_HAIRS_THICKNESS_KEY));
|
|
});
|
|
|
|
this._settings.connect(`changed::${CROSS_HAIRS_COLOR_KEY}`, () => {
|
|
this.setCrosshairsColor(this._settings.get_string(CROSS_HAIRS_COLOR_KEY));
|
|
});
|
|
|
|
this._settings.connect(`changed::${CROSS_HAIRS_OPACITY_KEY}`, () => {
|
|
this.setCrosshairsOpacity(this._settings.get_double(CROSS_HAIRS_OPACITY_KEY));
|
|
});
|
|
|
|
this._settings.connect(`changed::${CROSS_HAIRS_LENGTH_KEY}`, () => {
|
|
this.setCrosshairsLength(this._settings.get_int(CROSS_HAIRS_LENGTH_KEY));
|
|
});
|
|
|
|
this._settings.connect(`changed::${CROSS_HAIRS_CLIP_KEY}`, () => {
|
|
this.setCrosshairsClip(this._settings.get_boolean(CROSS_HAIRS_CLIP_KEY));
|
|
});
|
|
|
|
if (zoomRegion) {
|
|
// Mag factor is accurate to two decimal places.
|
|
let aPref = parseFloat(this._settings.get_double(MAG_FACTOR_KEY).toFixed(2));
|
|
if (aPref != 0.0)
|
|
zoomRegion.setMagFactor(aPref, aPref);
|
|
|
|
aPref = this._settings.get_enum(SCREEN_POSITION_KEY);
|
|
if (aPref)
|
|
zoomRegion.setScreenPosition(aPref);
|
|
|
|
zoomRegion.setLensMode(this._settings.get_boolean(LENS_MODE_KEY));
|
|
zoomRegion.setClampScrollingAtEdges(!this._settings.get_boolean(CLAMP_MODE_KEY));
|
|
|
|
aPref = this._settings.get_enum(MOUSE_TRACKING_KEY);
|
|
if (aPref)
|
|
zoomRegion.setMouseTrackingMode(aPref);
|
|
|
|
aPref = this._settings.get_enum(FOCUS_TRACKING_KEY);
|
|
if (aPref)
|
|
zoomRegion.setFocusTrackingMode(aPref);
|
|
|
|
aPref = this._settings.get_enum(CARET_TRACKING_KEY);
|
|
if (aPref)
|
|
zoomRegion.setCaretTrackingMode(aPref);
|
|
|
|
aPref = this._settings.get_boolean(INVERT_LIGHTNESS_KEY);
|
|
if (aPref)
|
|
zoomRegion.setInvertLightness(aPref);
|
|
|
|
aPref = this._settings.get_double(COLOR_SATURATION_KEY);
|
|
if (aPref)
|
|
zoomRegion.setColorSaturation(aPref);
|
|
|
|
let bc = {};
|
|
bc.r = this._settings.get_double(BRIGHT_RED_KEY);
|
|
bc.g = this._settings.get_double(BRIGHT_GREEN_KEY);
|
|
bc.b = this._settings.get_double(BRIGHT_BLUE_KEY);
|
|
zoomRegion.setBrightness(bc);
|
|
|
|
bc.r = this._settings.get_double(CONTRAST_RED_KEY);
|
|
bc.g = this._settings.get_double(CONTRAST_GREEN_KEY);
|
|
bc.b = this._settings.get_double(CONTRAST_BLUE_KEY);
|
|
zoomRegion.setContrast(bc);
|
|
}
|
|
|
|
let showCrosshairs = this._settings.get_boolean(SHOW_CROSS_HAIRS_KEY);
|
|
this.addCrosshairs();
|
|
this.setCrosshairsVisible(showCrosshairs);
|
|
}
|
|
|
|
_updateScreenPosition() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
let position = this._settings.get_enum(SCREEN_POSITION_KEY);
|
|
this._zoomRegions[0].setScreenPosition(position);
|
|
if (position != GDesktopEnums.MagnifierScreenPosition.FULL_SCREEN)
|
|
this._updateLensMode();
|
|
}
|
|
}
|
|
|
|
_updateMagFactor() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
// Mag factor is accurate to two decimal places.
|
|
let magFactor = parseFloat(this._settings.get_double(MAG_FACTOR_KEY).toFixed(2));
|
|
this._zoomRegions[0].setMagFactor(magFactor, magFactor);
|
|
}
|
|
}
|
|
|
|
_updateLensMode() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length)
|
|
this._zoomRegions[0].setLensMode(this._settings.get_boolean(LENS_MODE_KEY));
|
|
}
|
|
|
|
_updateClampMode() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
this._zoomRegions[0].setClampScrollingAtEdges(
|
|
!this._settings.get_boolean(CLAMP_MODE_KEY));
|
|
}
|
|
}
|
|
|
|
_updateMouseTrackingMode() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
this._zoomRegions[0].setMouseTrackingMode(
|
|
this._settings.get_enum(MOUSE_TRACKING_KEY));
|
|
}
|
|
}
|
|
|
|
_updateFocusTrackingMode() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
this._zoomRegions[0].setFocusTrackingMode(
|
|
this._settings.get_enum(FOCUS_TRACKING_KEY));
|
|
}
|
|
}
|
|
|
|
_updateCaretTrackingMode() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
this._zoomRegions[0].setCaretTrackingMode(
|
|
this._settings.get_enum(CARET_TRACKING_KEY));
|
|
}
|
|
}
|
|
|
|
_updateInvertLightness() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
this._zoomRegions[0].setInvertLightness(
|
|
this._settings.get_boolean(INVERT_LIGHTNESS_KEY));
|
|
}
|
|
}
|
|
|
|
_updateColorSaturation() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
this._zoomRegions[0].setColorSaturation(
|
|
this._settings.get_double(COLOR_SATURATION_KEY));
|
|
}
|
|
}
|
|
|
|
_updateBrightness() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
let brightness = {};
|
|
brightness.r = this._settings.get_double(BRIGHT_RED_KEY);
|
|
brightness.g = this._settings.get_double(BRIGHT_GREEN_KEY);
|
|
brightness.b = this._settings.get_double(BRIGHT_BLUE_KEY);
|
|
this._zoomRegions[0].setBrightness(brightness);
|
|
}
|
|
}
|
|
|
|
_updateContrast() {
|
|
// Applies only to the first zoom region.
|
|
if (this._zoomRegions.length) {
|
|
let contrast = {};
|
|
contrast.r = this._settings.get_double(CONTRAST_RED_KEY);
|
|
contrast.g = this._settings.get_double(CONTRAST_GREEN_KEY);
|
|
contrast.b = this._settings.get_double(CONTRAST_BLUE_KEY);
|
|
this._zoomRegions[0].setContrast(contrast);
|
|
}
|
|
}
|
|
};
|
|
Signals.addSignalMethods(Magnifier.prototype);
|
|
|
|
var ZoomRegion = class ZoomRegion {
|
|
constructor(magnifier, mouseSourceActor) {
|
|
this._magnifier = magnifier;
|
|
this._focusCaretTracker = new FocusCaretTracker.FocusCaretTracker();
|
|
|
|
this._mouseTrackingMode = GDesktopEnums.MagnifierMouseTrackingMode.NONE;
|
|
this._focusTrackingMode = GDesktopEnums.MagnifierFocusTrackingMode.NONE;
|
|
this._caretTrackingMode = GDesktopEnums.MagnifierCaretTrackingMode.NONE;
|
|
this._clampScrollingAtEdges = false;
|
|
this._lensMode = false;
|
|
this._screenPosition = GDesktopEnums.MagnifierScreenPosition.FULL_SCREEN;
|
|
this._invertLightness = false;
|
|
this._colorSaturation = 1.0;
|
|
this._brightness = { r: NO_CHANGE, g: NO_CHANGE, b: NO_CHANGE };
|
|
this._contrast = { r: NO_CHANGE, g: NO_CHANGE, b: NO_CHANGE };
|
|
|
|
this._magView = null;
|
|
this._background = null;
|
|
this._uiGroupClone = null;
|
|
this._mouseSourceActor = mouseSourceActor;
|
|
this._mouseActor = null;
|
|
this._crossHairs = null;
|
|
this._crossHairsActor = null;
|
|
|
|
this._viewPortX = 0;
|
|
this._viewPortY = 0;
|
|
this._viewPortWidth = global.screen_width;
|
|
this._viewPortHeight = global.screen_height;
|
|
this._xCenter = this._viewPortWidth / 2;
|
|
this._yCenter = this._viewPortHeight / 2;
|
|
this._xMagFactor = 1;
|
|
this._yMagFactor = 1;
|
|
this._followingCursor = false;
|
|
this._xFocus = 0;
|
|
this._yFocus = 0;
|
|
this._xCaret = 0;
|
|
this._yCaret = 0;
|
|
|
|
this._pointerIdleMonitor = Meta.IdleMonitor.get_core();
|
|
this._scrollContentsTimerId = 0;
|
|
}
|
|
|
|
_connectSignals() {
|
|
if (this._signalConnections)
|
|
return;
|
|
|
|
this._signalConnections = [];
|
|
let id = Main.layoutManager.connect('monitors-changed',
|
|
this._monitorsChanged.bind(this));
|
|
this._signalConnections.push([Main.layoutManager, id]);
|
|
|
|
id = this._focusCaretTracker.connect('caret-moved', this._updateCaret.bind(this));
|
|
this._signalConnections.push([this._focusCaretTracker, id]);
|
|
|
|
id = this._focusCaretTracker.connect('focus-changed', this._updateFocus.bind(this));
|
|
this._signalConnections.push([this._focusCaretTracker, id]);
|
|
}
|
|
|
|
_disconnectSignals() {
|
|
for (let [obj, id] of this._signalConnections)
|
|
obj.disconnect(id);
|
|
|
|
delete this._signalConnections;
|
|
}
|
|
|
|
_updateScreenPosition() {
|
|
if (this._screenPosition == GDesktopEnums.MagnifierScreenPosition.NONE) {
|
|
this._setViewPort({
|
|
x: this._viewPortX,
|
|
y: this._viewPortY,
|
|
width: this._viewPortWidth,
|
|
height: this._viewPortHeight,
|
|
});
|
|
} else {
|
|
this.setScreenPosition(this._screenPosition);
|
|
}
|
|
}
|
|
|
|
_updateFocus(caller, event) {
|
|
let component = event.source.get_component_iface();
|
|
if (!component || event.detail1 != 1)
|
|
return;
|
|
let extents;
|
|
try {
|
|
extents = component.get_extents(Atspi.CoordType.SCREEN);
|
|
} catch (e) {
|
|
log(`Failed to read extents of focused component: ${e.message}`);
|
|
return;
|
|
}
|
|
|
|
let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
|
|
let [xFocus, yFocus] = [(extents.x + (extents.width / 2)) * scaleFactor,
|
|
(extents.y + (extents.height / 2)) * scaleFactor];
|
|
|
|
if (this._xFocus !== xFocus || this._yFocus !== yFocus) {
|
|
[this._xFocus, this._yFocus] = [xFocus, yFocus];
|
|
this._centerFromFocusPosition();
|
|
}
|
|
}
|
|
|
|
_updateCaret(caller, event) {
|
|
let text = event.source.get_text_iface();
|
|
if (!text)
|
|
return;
|
|
let extents;
|
|
try {
|
|
extents = text.get_character_extents(text.get_caret_offset(), 0);
|
|
} catch (e) {
|
|
log(`Failed to read extents of text caret: ${e.message}`);
|
|
return;
|
|
}
|
|
|
|
let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
|
|
let [xCaret, yCaret] = [extents.x * scaleFactor, extents.y * scaleFactor];
|
|
|
|
if (this._xCaret !== xCaret || this._yCaret !== yCaret) {
|
|
[this._xCaret, this._yCaret] = [xCaret, yCaret];
|
|
this._centerFromCaretPosition();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* setActive:
|
|
* @param {bool} activate: Boolean to show/hide the ZoomRegion.
|
|
*/
|
|
setActive(activate) {
|
|
if (activate == this.isActive())
|
|
return;
|
|
|
|
if (activate) {
|
|
this._createActors();
|
|
if (this._isMouseOverRegion())
|
|
this._magnifier.hideSystemCursor();
|
|
this._updateScreenPosition();
|
|
this._updateMagViewGeometry();
|
|
this._updateCloneGeometry();
|
|
this._updateMousePosition();
|
|
this._connectSignals();
|
|
} else {
|
|
this._disconnectSignals();
|
|
this._destroyActors();
|
|
}
|
|
|
|
this._syncCaretTracking();
|
|
this._syncFocusTracking();
|
|
}
|
|
|
|
/**
|
|
* isActive:
|
|
* @returns {bool} Whether this ZoomRegion is active
|
|
*/
|
|
isActive() {
|
|
return this._magView != null;
|
|
}
|
|
|
|
/**
|
|
* setMagFactor:
|
|
* @param {number} xMagFactor: The power to set the horizontal
|
|
* magnification factor to of the magnified view. A value of 1.0
|
|
* means no magnification. A value of 2.0 doubles the size.
|
|
* @param {number} yMagFactor: The power to set the vertical
|
|
* magnification factor to of the magnified view.
|
|
*/
|
|
setMagFactor(xMagFactor, yMagFactor) {
|
|
this._changeROI({ xMagFactor,
|
|
yMagFactor,
|
|
redoCursorTracking: this._followingCursor,
|
|
animate: true });
|
|
}
|
|
|
|
/**
|
|
* getMagFactor:
|
|
* @returns {number[]} an array, [xMagFactor, yMagFactor], containing
|
|
* the horizontal and vertical magnification powers. A value of
|
|
* 1.0 means no magnification. A value of 2.0 means the contents
|
|
* are doubled in size, and so on.
|
|
*/
|
|
getMagFactor() {
|
|
return [this._xMagFactor, this._yMagFactor];
|
|
}
|
|
|
|
/**
|
|
* setMouseTrackingMode
|
|
* @param {GDesktopEnums.MagnifierMouseTrackingMode} mode: the new mode
|
|
*/
|
|
setMouseTrackingMode(mode) {
|
|
if (mode >= GDesktopEnums.MagnifierMouseTrackingMode.NONE &&
|
|
mode <= GDesktopEnums.MagnifierMouseTrackingMode.PUSH)
|
|
this._mouseTrackingMode = mode;
|
|
}
|
|
|
|
/**
|
|
* getMouseTrackingMode
|
|
* @returns {GDesktopEnums.MagnifierMouseTrackingMode} the current mode
|
|
*/
|
|
getMouseTrackingMode() {
|
|
return this._mouseTrackingMode;
|
|
}
|
|
|
|
/**
|
|
* setFocusTrackingMode
|
|
* @param {GDesktopEnums.MagnifierFocusTrackingMode} mode: the new mode
|
|
*/
|
|
setFocusTrackingMode(mode) {
|
|
this._focusTrackingMode = mode;
|
|
this._syncFocusTracking();
|
|
}
|
|
|
|
/**
|
|
* setCaretTrackingMode
|
|
* @param {GDesktopEnums.MagnifierCaretTrackingMode} mode: the new mode
|
|
*/
|
|
setCaretTrackingMode(mode) {
|
|
this._caretTrackingMode = mode;
|
|
this._syncCaretTracking();
|
|
}
|
|
|
|
_syncFocusTracking() {
|
|
let enabled = this._focusTrackingMode != GDesktopEnums.MagnifierFocusTrackingMode.NONE &&
|
|
this.isActive();
|
|
|
|
if (enabled)
|
|
this._focusCaretTracker.registerFocusListener();
|
|
else
|
|
this._focusCaretTracker.deregisterFocusListener();
|
|
}
|
|
|
|
_syncCaretTracking() {
|
|
let enabled = this._caretTrackingMode != GDesktopEnums.MagnifierCaretTrackingMode.NONE &&
|
|
this.isActive();
|
|
|
|
if (enabled)
|
|
this._focusCaretTracker.registerCaretListener();
|
|
else
|
|
this._focusCaretTracker.deregisterCaretListener();
|
|
}
|
|
|
|
/**
|
|
* setViewPort
|
|
* Sets the position and size of the ZoomRegion on screen.
|
|
* @param {{x: number, y: number, width: number, height: number}} viewPort:
|
|
* Object defining the position and size of the view port.
|
|
* The values are in stage coordinate space.
|
|
*/
|
|
setViewPort(viewPort) {
|
|
this._setViewPort(viewPort);
|
|
this._screenPosition = GDesktopEnums.MagnifierScreenPosition.NONE;
|
|
}
|
|
|
|
/**
|
|
* setROI
|
|
* Sets the "region of interest" that the ZoomRegion is magnifying.
|
|
* @param {{x: number, y: number, width: number, height: number}} roi:
|
|
* Object that defines the region of the screen to magnify.
|
|
* The values are in screen (unmagnified) coordinate space.
|
|
*/
|
|
setROI(roi) {
|
|
if (roi.width <= 0 || roi.height <= 0)
|
|
return;
|
|
|
|
this._followingCursor = false;
|
|
this._changeROI({ xMagFactor: this._viewPortWidth / roi.width,
|
|
yMagFactor: this._viewPortHeight / roi.height,
|
|
xCenter: roi.x + roi.width / 2,
|
|
yCenter: roi.y + roi.height / 2 });
|
|
}
|
|
|
|
/**
|
|
* getROI:
|
|
* Retrieves the "region of interest" -- the rectangular bounds of that part
|
|
* of the desktop that the magnified view is showing (x, y, width, height).
|
|
* The bounds are given in non-magnified coordinates.
|
|
* @returns {number[]} an array, [x, y, width, height], representing
|
|
* the bounding rectangle of what is shown in the magnified view.
|
|
*/
|
|
getROI() {
|
|
let roiWidth = this._viewPortWidth / this._xMagFactor;
|
|
let roiHeight = this._viewPortHeight / this._yMagFactor;
|
|
|
|
return [this._xCenter - roiWidth / 2,
|
|
this._yCenter - roiHeight / 2,
|
|
roiWidth, roiHeight];
|
|
}
|
|
|
|
/**
|
|
* setLensMode:
|
|
* Turn lens mode on/off. In full screen mode, lens mode does nothing since
|
|
* a lens the size of the screen is pointless.
|
|
* @param {bool} lensMode: Whether lensMode should be active
|
|
*/
|
|
setLensMode(lensMode) {
|
|
this._lensMode = lensMode;
|
|
if (!this._lensMode)
|
|
this.setScreenPosition(this._screenPosition);
|
|
}
|
|
|
|
/**
|
|
* isLensMode:
|
|
* Is lens mode on or off?
|
|
* @returns {bool} The lens mode state.
|
|
*/
|
|
isLensMode() {
|
|
return this._lensMode;
|
|
}
|
|
|
|
/**
|
|
* setClampScrollingAtEdges:
|
|
* Stop vs. allow scrolling of the magnified contents when it scroll beyond
|
|
* the edges of the screen.
|
|
* @param {bool} clamp: Boolean to turn on/off clamping.
|
|
*/
|
|
setClampScrollingAtEdges(clamp) {
|
|
this._clampScrollingAtEdges = clamp;
|
|
if (clamp)
|
|
this._changeROI();
|
|
}
|
|
|
|
/**
|
|
* setTopHalf:
|
|
* Magnifier view occupies the top half of the screen.
|
|
*/
|
|
setTopHalf() {
|
|
let viewPort = {};
|
|
viewPort.x = 0;
|
|
viewPort.y = 0;
|
|
viewPort.width = global.screen_width;
|
|
viewPort.height = global.screen_height / 2;
|
|
this._setViewPort(viewPort);
|
|
this._screenPosition = GDesktopEnums.MagnifierScreenPosition.TOP_HALF;
|
|
}
|
|
|
|
/**
|
|
* setBottomHalf:
|
|
* Magnifier view occupies the bottom half of the screen.
|
|
*/
|
|
setBottomHalf() {
|
|
let viewPort = {};
|
|
viewPort.x = 0;
|
|
viewPort.y = global.screen_height / 2;
|
|
viewPort.width = global.screen_width;
|
|
viewPort.height = global.screen_height / 2;
|
|
this._setViewPort(viewPort);
|
|
this._screenPosition = GDesktopEnums.MagnifierScreenPosition.BOTTOM_HALF;
|
|
}
|
|
|
|
/**
|
|
* setLeftHalf:
|
|
* Magnifier view occupies the left half of the screen.
|
|
*/
|
|
setLeftHalf() {
|
|
let viewPort = {};
|
|
viewPort.x = 0;
|
|
viewPort.y = 0;
|
|
viewPort.width = global.screen_width / 2;
|
|
viewPort.height = global.screen_height;
|
|
this._setViewPort(viewPort);
|
|
this._screenPosition = GDesktopEnums.MagnifierScreenPosition.LEFT_HALF;
|
|
}
|
|
|
|
/**
|
|
* setRightHalf:
|
|
* Magnifier view occupies the right half of the screen.
|
|
*/
|
|
setRightHalf() {
|
|
let viewPort = {};
|
|
viewPort.x = global.screen_width / 2;
|
|
viewPort.y = 0;
|
|
viewPort.width = global.screen_width / 2;
|
|
viewPort.height = global.screen_height;
|
|
this._setViewPort(viewPort);
|
|
this._screenPosition = GDesktopEnums.MagnifierScreenPosition.RIGHT_HALF;
|
|
}
|
|
|
|
/**
|
|
* setFullScreenMode:
|
|
* Set the ZoomRegion to full-screen mode.
|
|
* Note: disallows lens mode.
|
|
*/
|
|
setFullScreenMode() {
|
|
let viewPort = {};
|
|
viewPort.x = 0;
|
|
viewPort.y = 0;
|
|
viewPort.width = global.screen_width;
|
|
viewPort.height = global.screen_height;
|
|
this.setViewPort(viewPort);
|
|
|
|
this._screenPosition = GDesktopEnums.MagnifierScreenPosition.FULL_SCREEN;
|
|
}
|
|
|
|
/**
|
|
* setScreenPosition:
|
|
* Positions the zoom region to one of the enumerated positions on the
|
|
* screen.
|
|
* @param {GDesktopEnums.MagnifierScreenPosition} inPosition: the position
|
|
*/
|
|
setScreenPosition(inPosition) {
|
|
switch (inPosition) {
|
|
case GDesktopEnums.MagnifierScreenPosition.FULL_SCREEN:
|
|
this.setFullScreenMode();
|
|
break;
|
|
case GDesktopEnums.MagnifierScreenPosition.TOP_HALF:
|
|
this.setTopHalf();
|
|
break;
|
|
case GDesktopEnums.MagnifierScreenPosition.BOTTOM_HALF:
|
|
this.setBottomHalf();
|
|
break;
|
|
case GDesktopEnums.MagnifierScreenPosition.LEFT_HALF:
|
|
this.setLeftHalf();
|
|
break;
|
|
case GDesktopEnums.MagnifierScreenPosition.RIGHT_HALF:
|
|
this.setRightHalf();
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* getScreenPosition:
|
|
* Tell the outside world what the current mode is -- magnifiying the
|
|
* top half, bottom half, etc.
|
|
* @returns {GDesktopEnums.MagnifierScreenPosition}: the current position.
|
|
*/
|
|
getScreenPosition() {
|
|
return this._screenPosition;
|
|
}
|
|
|
|
_clearScrollContentsTimer() {
|
|
if (this._scrollContentsTimerId !== 0) {
|
|
GLib.source_remove(this._scrollContentsTimerId);
|
|
this._scrollContentsTimerId = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* scrollToMousePos:
|
|
* Set the region of interest based on the position of the system pointer.
|
|
* @returns {bool}: Whether the system mouse pointer is over the
|
|
* magnified view.
|
|
*/
|
|
scrollToMousePos() {
|
|
this._followingCursor = true;
|
|
if (this._mouseTrackingMode != GDesktopEnums.MagnifierMouseTrackingMode.NONE)
|
|
this._changeROI({ redoCursorTracking: true });
|
|
else
|
|
this._updateMousePosition();
|
|
|
|
this._clearScrollContentsTimer();
|
|
this._scrollContentsTimerId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, POINTER_REST_TIME, () => {
|
|
this._followingCursor = false;
|
|
if (this._xDelayed !== null && this._yDelayed !== null) {
|
|
this._scrollContentsToDelayed(this._xDelayed, this._yDelayed);
|
|
this._xDelayed = null;
|
|
this._yDelayed = null;
|
|
}
|
|
|
|
return GLib.SOURCE_REMOVE;
|
|
});
|
|
|
|
// Determine whether the system mouse pointer is over this zoom region.
|
|
return this._isMouseOverRegion();
|
|
}
|
|
|
|
_scrollContentsToDelayed(x, y) {
|
|
if (this._followingCursor) {
|
|
this._xDelayed = x;
|
|
this._yDelayed = y;
|
|
} else {
|
|
this.scrollContentsTo(x, y);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* scrollContentsTo:
|
|
* Shift the contents of the magnified view such it is centered on the given
|
|
* coordinate.
|
|
* @param {number} x: The x-coord of the point to center on.
|
|
* @param {number} y: The y-coord of the point to center on.
|
|
*/
|
|
scrollContentsTo(x, y) {
|
|
if (x < 0 || x > global.screen_width ||
|
|
y < 0 || y > global.screen_height)
|
|
return;
|
|
|
|
this._clearScrollContentsTimer();
|
|
|
|
this._followingCursor = false;
|
|
this._changeROI({ xCenter: x,
|
|
yCenter: y,
|
|
animate: true });
|
|
}
|
|
|
|
/**
|
|
* addCrosshairs:
|
|
* Add crosshairs centered on the magnified mouse.
|
|
* @param {Crosshairs} crossHairs: Crosshairs instance
|
|
*/
|
|
addCrosshairs(crossHairs) {
|
|
this._crossHairs = crossHairs;
|
|
|
|
// If the crossHairs is not already within a larger container, add it
|
|
// to this zoom region. Otherwise, add a clone.
|
|
if (crossHairs && this.isActive())
|
|
this._crossHairsActor = crossHairs.addToZoomRegion(this, this._mouseActor);
|
|
}
|
|
|
|
/**
|
|
* setInvertLightness:
|
|
* Set whether to invert the lightness of the magnified view.
|
|
* @param {bool} flag: whether brightness should be inverted
|
|
*/
|
|
setInvertLightness(flag) {
|
|
this._invertLightness = flag;
|
|
if (this._magShaderEffects)
|
|
this._magShaderEffects.setInvertLightness(this._invertLightness);
|
|
}
|
|
|
|
/**
|
|
* getInvertLightness:
|
|
* Retrieve whether the lightness is inverted.
|
|
* @returns {bool} whether brightness should be inverted
|
|
*/
|
|
getInvertLightness() {
|
|
return this._invertLightness;
|
|
}
|
|
|
|
/**
|
|
* setColorSaturation:
|
|
* Set the color saturation of the magnified view.
|
|
* @param {number} saturation: A value from 0.0 to 1.0 that defines
|
|
* the color saturation, with 0.0 defining no color (grayscale),
|
|
* and 1.0 defining full color.
|
|
*/
|
|
setColorSaturation(saturation) {
|
|
this._colorSaturation = saturation;
|
|
if (this._magShaderEffects)
|
|
this._magShaderEffects.setColorSaturation(this._colorSaturation);
|
|
}
|
|
|
|
/**
|
|
* getColorSaturation:
|
|
* Retrieve the color saturation of the magnified view.
|
|
* @returns {number} the color saturation
|
|
*/
|
|
getColorSaturation() {
|
|
return this._colorSaturation;
|
|
}
|
|
|
|
/**
|
|
* setBrightness:
|
|
* Alter the brightness of the magnified view.
|
|
* @param {Object} brightness: Object containing the contrast for the
|
|
* red, green, and blue channels. Values of 0.0 represent "standard"
|
|
* brightness (no change), whereas values less or greater than
|
|
* 0.0 indicate decreased or incresaed brightness, respectively.
|
|
*
|
|
* {number} brightness.r - the red component
|
|
* {number} brightness.g - the green component
|
|
* {number} brightness.b - the blue component
|
|
*/
|
|
setBrightness(brightness) {
|
|
this._brightness.r = brightness.r;
|
|
this._brightness.g = brightness.g;
|
|
this._brightness.b = brightness.b;
|
|
if (this._magShaderEffects)
|
|
this._magShaderEffects.setBrightness(this._brightness);
|
|
}
|
|
|
|
/**
|
|
* setContrast:
|
|
* Alter the contrast of the magnified view.
|
|
* @param {Object} contrast: Object containing the contrast for the
|
|
* red, green, and blue channels. Values of 0.0 represent "standard"
|
|
* contrast (no change), whereas values less or greater than
|
|
* 0.0 indicate decreased or incresaed contrast, respectively.
|
|
*
|
|
* {number} contrast.r - the red component
|
|
* {number} contrast.g - the green component
|
|
* {number} contrast.b - the blue component
|
|
*/
|
|
setContrast(contrast) {
|
|
this._contrast.r = contrast.r;
|
|
this._contrast.g = contrast.g;
|
|
this._contrast.b = contrast.b;
|
|
if (this._magShaderEffects)
|
|
this._magShaderEffects.setContrast(this._contrast);
|
|
}
|
|
|
|
/**
|
|
* getContrast:
|
|
* Retrieve the contrast of the magnified view.
|
|
* @returns {{r: number, g: number, b: number}}: Object containing
|
|
* the contrast for the red, green, and blue channels.
|
|
*/
|
|
getContrast() {
|
|
let contrast = {};
|
|
contrast.r = this._contrast.r;
|
|
contrast.g = this._contrast.g;
|
|
contrast.b = this._contrast.b;
|
|
return contrast;
|
|
}
|
|
|
|
// Private methods //
|
|
|
|
_createActors() {
|
|
// The root actor for the zoom region
|
|
this._magView = new St.Bin({ style_class: 'magnifier-zoom-region' });
|
|
global.stage.add_actor(this._magView);
|
|
|
|
// hide the magnified region from CLUTTER_PICK_ALL
|
|
Shell.util_set_hidden_from_pick(this._magView, true);
|
|
|
|
// Add a group to clip the contents of the magnified view.
|
|
let mainGroup = new Clutter.Actor({ clip_to_allocation: true });
|
|
this._magView.set_child(mainGroup);
|
|
|
|
// Add a background for when the magnified uiGroup is scrolled
|
|
// out of view (don't want to see desktop showing through).
|
|
this._background = new Background.SystemBackground();
|
|
mainGroup.add_actor(this._background);
|
|
|
|
// Clone the group that contains all of UI on the screen. This is the
|
|
// chrome, the windows, etc.
|
|
this._uiGroupClone = new Clutter.Clone({ source: Main.uiGroup,
|
|
clip_to_allocation: true });
|
|
mainGroup.add_actor(this._uiGroupClone);
|
|
|
|
// Add either the given mouseSourceActor to the ZoomRegion, or a clone of
|
|
// it.
|
|
if (this._mouseSourceActor.get_parent() != null)
|
|
this._mouseActor = new Clutter.Clone({ source: this._mouseSourceActor });
|
|
else
|
|
this._mouseActor = this._mouseSourceActor;
|
|
mainGroup.add_actor(this._mouseActor);
|
|
|
|
if (this._crossHairs)
|
|
this._crossHairsActor = this._crossHairs.addToZoomRegion(this, this._mouseActor);
|
|
else
|
|
this._crossHairsActor = null;
|
|
|
|
// Contrast and brightness effects.
|
|
this._magShaderEffects = new MagShaderEffects(mainGroup);
|
|
this._magShaderEffects.setColorSaturation(this._colorSaturation);
|
|
this._magShaderEffects.setInvertLightness(this._invertLightness);
|
|
this._magShaderEffects.setBrightness(this._brightness);
|
|
this._magShaderEffects.setContrast(this._contrast);
|
|
}
|
|
|
|
_destroyActors() {
|
|
if (this._mouseActor == this._mouseSourceActor)
|
|
this._mouseActor.get_parent().remove_actor(this._mouseActor);
|
|
if (this._crossHairs)
|
|
this._crossHairs.removeFromParent(this._crossHairsActor);
|
|
|
|
this._magShaderEffects.destroyEffects();
|
|
this._magShaderEffects = null;
|
|
this._magView.destroy();
|
|
this._magView = null;
|
|
this._background = null;
|
|
this._uiGroupClone = null;
|
|
this._mouseActor = null;
|
|
this._crossHairsActor = null;
|
|
}
|
|
|
|
_setViewPort(viewPort, fromROIUpdate) {
|
|
// Sets the position of the zoom region on the screen
|
|
|
|
let width = Math.round(Math.min(viewPort.width, global.screen_width));
|
|
let height = Math.round(Math.min(viewPort.height, global.screen_height));
|
|
let x = Math.max(viewPort.x, 0);
|
|
let y = Math.max(viewPort.y, 0);
|
|
|
|
x = Math.round(Math.min(x, global.screen_width - width));
|
|
y = Math.round(Math.min(y, global.screen_height - height));
|
|
|
|
this._viewPortX = x;
|
|
this._viewPortY = y;
|
|
this._viewPortWidth = width;
|
|
this._viewPortHeight = height;
|
|
|
|
this._updateMagViewGeometry();
|
|
|
|
if (!fromROIUpdate)
|
|
this._changeROI({ redoCursorTracking: this._followingCursor }); // will update mouse
|
|
|
|
if (this.isActive() && this._isMouseOverRegion())
|
|
this._magnifier.hideSystemCursor();
|
|
}
|
|
|
|
_changeROI(params) {
|
|
// Updates the area we are viewing; the magnification factors
|
|
// and center can be set explicitly, or we can recompute
|
|
// the position based on the mouse cursor position
|
|
|
|
params = Params.parse(params, { xMagFactor: this._xMagFactor,
|
|
yMagFactor: this._yMagFactor,
|
|
xCenter: this._xCenter,
|
|
yCenter: this._yCenter,
|
|
redoCursorTracking: false,
|
|
animate: false });
|
|
|
|
if (params.xMagFactor <= 0)
|
|
params.xMagFactor = this._xMagFactor;
|
|
if (params.yMagFactor <= 0)
|
|
params.yMagFactor = this._yMagFactor;
|
|
|
|
this._xMagFactor = params.xMagFactor;
|
|
this._yMagFactor = params.yMagFactor;
|
|
|
|
if (params.redoCursorTracking &&
|
|
this._mouseTrackingMode != GDesktopEnums.MagnifierMouseTrackingMode.NONE) {
|
|
// This depends on this.xMagFactor/yMagFactor already being updated
|
|
[params.xCenter, params.yCenter] = this._centerFromMousePosition();
|
|
}
|
|
|
|
if (this._clampScrollingAtEdges) {
|
|
let roiWidth = this._viewPortWidth / this._xMagFactor;
|
|
let roiHeight = this._viewPortHeight / this._yMagFactor;
|
|
|
|
params.xCenter = Math.min(params.xCenter, global.screen_width - roiWidth / 2);
|
|
params.xCenter = Math.max(params.xCenter, roiWidth / 2);
|
|
params.yCenter = Math.min(params.yCenter, global.screen_height - roiHeight / 2);
|
|
params.yCenter = Math.max(params.yCenter, roiHeight / 2);
|
|
}
|
|
|
|
this._xCenter = params.xCenter;
|
|
this._yCenter = params.yCenter;
|
|
|
|
// If in lens mode, move the magnified view such that it is centered
|
|
// over the actual mouse. However, in full screen mode, the "lens" is
|
|
// the size of the screen -- pointless to move such a large lens around.
|
|
if (this._lensMode && !this._isFullScreen()) {
|
|
this._setViewPort({ x: this._xCenter - this._viewPortWidth / 2,
|
|
y: this._yCenter - this._viewPortHeight / 2,
|
|
width: this._viewPortWidth,
|
|
height: this._viewPortHeight }, true);
|
|
}
|
|
|
|
this._updateCloneGeometry(params.animate);
|
|
}
|
|
|
|
_isMouseOverRegion() {
|
|
// Return whether the system mouse sprite is over this ZoomRegion. If the
|
|
// mouse's position is not given, then it is fetched.
|
|
let mouseIsOver = false;
|
|
if (this.isActive()) {
|
|
let xMouse = this._magnifier.xMouse;
|
|
let yMouse = this._magnifier.yMouse;
|
|
|
|
mouseIsOver =
|
|
xMouse >= this._viewPortX && xMouse < (this._viewPortX + this._viewPortWidth) &&
|
|
yMouse >= this._viewPortY && yMouse < (this._viewPortY + this._viewPortHeight);
|
|
}
|
|
return mouseIsOver;
|
|
}
|
|
|
|
_isFullScreen() {
|
|
// Does the magnified view occupy the whole screen? Note that this
|
|
// doesn't necessarily imply
|
|
// this._screenPosition = GDesktopEnums.MagnifierScreenPosition.FULL_SCREEN;
|
|
|
|
if (this._viewPortX != 0 || this._viewPortY != 0)
|
|
return false;
|
|
if (this._viewPortWidth != global.screen_width ||
|
|
this._viewPortHeight != global.screen_height)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
_centerFromMousePosition() {
|
|
// Determines where the center should be given the current cursor
|
|
// position and mouse tracking mode
|
|
|
|
let xMouse = this._magnifier.xMouse;
|
|
let yMouse = this._magnifier.yMouse;
|
|
|
|
if (this._mouseTrackingMode == GDesktopEnums.MagnifierMouseTrackingMode.PROPORTIONAL)
|
|
return this._centerFromPointProportional(xMouse, yMouse);
|
|
else if (this._mouseTrackingMode == GDesktopEnums.MagnifierMouseTrackingMode.PUSH)
|
|
return this._centerFromPointPush(xMouse, yMouse);
|
|
else if (this._mouseTrackingMode == GDesktopEnums.MagnifierMouseTrackingMode.CENTERED)
|
|
return this._centerFromPointCentered(xMouse, yMouse);
|
|
|
|
return null; // Should never be hit
|
|
}
|
|
|
|
_centerFromCaretPosition() {
|
|
let xCaret = this._xCaret;
|
|
let yCaret = this._yCaret;
|
|
|
|
if (this._caretTrackingMode == GDesktopEnums.MagnifierCaretTrackingMode.PROPORTIONAL)
|
|
[xCaret, yCaret] = this._centerFromPointProportional(xCaret, yCaret);
|
|
else if (this._caretTrackingMode == GDesktopEnums.MagnifierCaretTrackingMode.PUSH)
|
|
[xCaret, yCaret] = this._centerFromPointPush(xCaret, yCaret);
|
|
else if (this._caretTrackingMode == GDesktopEnums.MagnifierCaretTrackingMode.CENTERED)
|
|
[xCaret, yCaret] = this._centerFromPointCentered(xCaret, yCaret);
|
|
|
|
this._scrollContentsToDelayed(xCaret, yCaret);
|
|
}
|
|
|
|
_centerFromFocusPosition() {
|
|
let xFocus = this._xFocus;
|
|
let yFocus = this._yFocus;
|
|
|
|
if (this._focusTrackingMode == GDesktopEnums.MagnifierFocusTrackingMode.PROPORTIONAL)
|
|
[xFocus, yFocus] = this._centerFromPointProportional(xFocus, yFocus);
|
|
else if (this._focusTrackingMode == GDesktopEnums.MagnifierFocusTrackingMode.PUSH)
|
|
[xFocus, yFocus] = this._centerFromPointPush(xFocus, yFocus);
|
|
else if (this._focusTrackingMode == GDesktopEnums.MagnifierFocusTrackingMode.CENTERED)
|
|
[xFocus, yFocus] = this._centerFromPointCentered(xFocus, yFocus);
|
|
|
|
this._scrollContentsToDelayed(xFocus, yFocus);
|
|
}
|
|
|
|
_centerFromPointPush(xPoint, yPoint) {
|
|
let [xRoi, yRoi, widthRoi, heightRoi] = this.getROI();
|
|
let [cursorWidth, cursorHeight] = this._mouseSourceActor.get_size();
|
|
let xPos = xRoi + widthRoi / 2;
|
|
let yPos = yRoi + heightRoi / 2;
|
|
let xRoiRight = xRoi + widthRoi - cursorWidth;
|
|
let yRoiBottom = yRoi + heightRoi - cursorHeight;
|
|
|
|
if (xPoint < xRoi)
|
|
xPos -= xRoi - xPoint;
|
|
else if (xPoint > xRoiRight)
|
|
xPos += xPoint - xRoiRight;
|
|
|
|
if (yPoint < yRoi)
|
|
yPos -= yRoi - yPoint;
|
|
else if (yPoint > yRoiBottom)
|
|
yPos += yPoint - yRoiBottom;
|
|
|
|
return [xPos, yPos];
|
|
}
|
|
|
|
_centerFromPointProportional(xPoint, yPoint) {
|
|
let [xRoi_, yRoi_, widthRoi, heightRoi] = this.getROI();
|
|
let halfScreenWidth = global.screen_width / 2;
|
|
let halfScreenHeight = global.screen_height / 2;
|
|
// We want to pad with a constant distance after zooming, so divide
|
|
// by the magnification factor.
|
|
let unscaledPadding = Math.min(this._viewPortWidth, this._viewPortHeight) / 5;
|
|
let xPadding = unscaledPadding / this._xMagFactor;
|
|
let yPadding = unscaledPadding / this._yMagFactor;
|
|
let xProportion = (xPoint - halfScreenWidth) / halfScreenWidth; // -1 ... 1
|
|
let yProportion = (yPoint - halfScreenHeight) / halfScreenHeight; // -1 ... 1
|
|
let xPos = xPoint - xProportion * (widthRoi / 2 - xPadding);
|
|
let yPos = yPoint - yProportion * (heightRoi / 2 - yPadding);
|
|
|
|
return [xPos, yPos];
|
|
}
|
|
|
|
_centerFromPointCentered(xPoint, yPoint) {
|
|
return [xPoint, yPoint];
|
|
}
|
|
|
|
_screenToViewPort(screenX, screenY) {
|
|
// Converts coordinates relative to the (unmagnified) screen to coordinates
|
|
// relative to the origin of this._magView
|
|
return [this._viewPortWidth / 2 + (screenX - this._xCenter) * this._xMagFactor,
|
|
this._viewPortHeight / 2 + (screenY - this._yCenter) * this._yMagFactor];
|
|
}
|
|
|
|
_updateMagViewGeometry() {
|
|
if (!this.isActive())
|
|
return;
|
|
|
|
if (this._isFullScreen())
|
|
this._magView.add_style_class_name('full-screen');
|
|
else
|
|
this._magView.remove_style_class_name('full-screen');
|
|
|
|
this._magView.set_size(this._viewPortWidth, this._viewPortHeight);
|
|
this._magView.set_position(this._viewPortX, this._viewPortY);
|
|
}
|
|
|
|
_updateCloneGeometry(animate = false) {
|
|
if (!this.isActive())
|
|
return;
|
|
|
|
let [x, y] = this._screenToViewPort(0, 0);
|
|
this._uiGroupClone.ease({
|
|
x: Math.round(x),
|
|
y: Math.round(y),
|
|
scale_x: this._xMagFactor,
|
|
scale_y: this._yMagFactor,
|
|
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
|
|
duration: animate ? 100 : 0,
|
|
});
|
|
|
|
let [mouseX, mouseY] = this._getMousePosition();
|
|
this._mouseActor.ease({
|
|
x: mouseX,
|
|
y: mouseY,
|
|
scale_x: this._xMagFactor,
|
|
scale_y: this._yMagFactor,
|
|
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
|
|
duration: animate ? 100 : 0,
|
|
});
|
|
|
|
if (this._crossHairsActor) {
|
|
let [crossX, crossY] = this._getCrossHairsPosition();
|
|
this._crossHairsActor.ease({
|
|
x: crossX,
|
|
y: crossY,
|
|
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
|
|
duration: animate ? 100 : 0,
|
|
});
|
|
}
|
|
}
|
|
|
|
_updateMousePosition() {
|
|
let [xMagMouse, yMagMouse] = this._getMousePosition();
|
|
this._mouseActor.set_position(xMagMouse, yMagMouse);
|
|
|
|
if (this._crossHairsActor) {
|
|
let [crossX, crossY] = this._getCrossHairsPosition();
|
|
this._crossHairsActor.set_position(crossX, crossY);
|
|
}
|
|
}
|
|
|
|
_getMousePosition() {
|
|
let [xMagMouse, yMagMouse] = this._screenToViewPort(
|
|
this._magnifier.xMouse, this._magnifier.yMouse);
|
|
return [Math.round(xMagMouse), Math.round(yMagMouse)];
|
|
}
|
|
|
|
_getCrossHairsPosition() {
|
|
let [xMagMouse, yMagMouse] = this._getMousePosition();
|
|
let [groupWidth, groupHeight] = this._crossHairsActor.get_size();
|
|
|
|
return [xMagMouse - groupWidth / 2, yMagMouse - groupHeight / 2];
|
|
}
|
|
|
|
_monitorsChanged() {
|
|
this._background.set_size(global.screen_width, global.screen_height);
|
|
this._updateScreenPosition();
|
|
}
|
|
};
|
|
|
|
var Crosshairs = GObject.registerClass(
|
|
class Crosshairs extends Clutter.Actor {
|
|
_init() {
|
|
// Set the group containing the crosshairs to three times the desktop
|
|
// size in case the crosshairs need to appear to be infinite in
|
|
// length (i.e., extend beyond the edges of the view they appear in).
|
|
let groupWidth = global.screen_width * 3;
|
|
let groupHeight = global.screen_height * 3;
|
|
|
|
super._init({
|
|
clip_to_allocation: false,
|
|
width: groupWidth,
|
|
height: groupHeight,
|
|
});
|
|
this._horizLeftHair = new Clutter.Actor();
|
|
this._horizRightHair = new Clutter.Actor();
|
|
this._vertTopHair = new Clutter.Actor();
|
|
this._vertBottomHair = new Clutter.Actor();
|
|
this.add_actor(this._horizLeftHair);
|
|
this.add_actor(this._horizRightHair);
|
|
this.add_actor(this._vertTopHair);
|
|
this.add_actor(this._vertBottomHair);
|
|
this._clipSize = [0, 0];
|
|
this._clones = [];
|
|
this.reCenter();
|
|
|
|
Main.layoutManager.connect('monitors-changed',
|
|
this._monitorsChanged.bind(this));
|
|
}
|
|
|
|
_monitorsChanged() {
|
|
this.set_size(global.screen_width * 3, global.screen_height * 3);
|
|
this.reCenter();
|
|
}
|
|
|
|
/**
|
|
* addToZoomRegion
|
|
* Either add the crosshairs actor to the given ZoomRegion, or, if it is
|
|
* already part of some other ZoomRegion, create a clone of the crosshairs
|
|
* actor, and add the clone instead. Returns either the original or the
|
|
* clone.
|
|
* @param {ZoomRegion} zoomRegion: The container to add the crosshairs
|
|
* group to.
|
|
* @param {Clutter.Actor} magnifiedMouse: The mouse actor for the
|
|
* zoom region -- used to position the crosshairs and properly
|
|
* layer them below the mouse.
|
|
* @returns {Clutter.Actor} The crosshairs actor, or its clone.
|
|
*/
|
|
addToZoomRegion(zoomRegion, magnifiedMouse) {
|
|
let crosshairsActor = null;
|
|
if (zoomRegion && magnifiedMouse) {
|
|
let container = magnifiedMouse.get_parent();
|
|
if (container) {
|
|
crosshairsActor = this;
|
|
if (this.get_parent() != null) {
|
|
crosshairsActor = new Clutter.Clone({ source: this });
|
|
this._clones.push(crosshairsActor);
|
|
|
|
// Clones don't share visibility.
|
|
this.bind_property('visible', crosshairsActor, 'visible',
|
|
GObject.BindingFlags.SYNC_CREATE);
|
|
}
|
|
|
|
container.add_actor(crosshairsActor);
|
|
container.set_child_above_sibling(magnifiedMouse, crosshairsActor);
|
|
let [xMouse, yMouse] = magnifiedMouse.get_position();
|
|
let [crosshairsWidth, crosshairsHeight] = crosshairsActor.get_size();
|
|
crosshairsActor.set_position(xMouse - crosshairsWidth / 2, yMouse - crosshairsHeight / 2);
|
|
}
|
|
}
|
|
return crosshairsActor;
|
|
}
|
|
|
|
/**
|
|
* removeFromParent:
|
|
* @param {Clutter.Actor} childActor: the actor returned from
|
|
* addToZoomRegion
|
|
* Remove the crosshairs actor from its parent container, or destroy the
|
|
* child actor if it was just a clone of the crosshairs actor.
|
|
*/
|
|
removeFromParent(childActor) {
|
|
if (childActor == this)
|
|
childActor.get_parent().remove_actor(childActor);
|
|
else
|
|
childActor.destroy();
|
|
}
|
|
|
|
/**
|
|
* setColor:
|
|
* Set the color of the crosshairs.
|
|
* @param {Clutter.Color} clutterColor: The color
|
|
*/
|
|
setColor(clutterColor) {
|
|
this._horizLeftHair.background_color = clutterColor;
|
|
this._horizRightHair.background_color = clutterColor;
|
|
this._vertTopHair.background_color = clutterColor;
|
|
this._vertBottomHair.background_color = clutterColor;
|
|
}
|
|
|
|
/**
|
|
* getColor:
|
|
* Get the color of the crosshairs.
|
|
* @returns {ClutterColor} the crosshairs color
|
|
*/
|
|
getColor() {
|
|
return this._horizLeftHair.get_color();
|
|
}
|
|
|
|
/**
|
|
* setThickness:
|
|
* Set the width of the vertical and horizontal lines of the crosshairs.
|
|
* @param {number} thickness: the new thickness value
|
|
*/
|
|
setThickness(thickness) {
|
|
this._horizLeftHair.set_height(thickness);
|
|
this._horizRightHair.set_height(thickness);
|
|
this._vertTopHair.set_width(thickness);
|
|
this._vertBottomHair.set_width(thickness);
|
|
this.reCenter();
|
|
}
|
|
|
|
/**
|
|
* getThickness:
|
|
* Get the width of the vertical and horizontal lines of the crosshairs.
|
|
* @returns {number} The thickness of the crosshairs.
|
|
*/
|
|
getThickness() {
|
|
return this._horizLeftHair.get_height();
|
|
}
|
|
|
|
/**
|
|
* setOpacity:
|
|
* Set how opaque the crosshairs are.
|
|
* @param {number} opacity: Value between 0 (fully transparent)
|
|
* and 255 (full opaque).
|
|
*/
|
|
setOpacity(opacity) {
|
|
// set_opacity() throws an exception for values outside the range
|
|
// [0, 255].
|
|
if (opacity < 0)
|
|
opacity = 0;
|
|
else if (opacity > 255)
|
|
opacity = 255;
|
|
|
|
this._horizLeftHair.set_opacity(opacity);
|
|
this._horizRightHair.set_opacity(opacity);
|
|
this._vertTopHair.set_opacity(opacity);
|
|
this._vertBottomHair.set_opacity(opacity);
|
|
}
|
|
|
|
/**
|
|
* setLength:
|
|
* Set the length of the vertical and horizontal lines in the crosshairs.
|
|
* @param {number} length: The length of the crosshairs.
|
|
*/
|
|
setLength(length) {
|
|
this._horizLeftHair.set_width(length);
|
|
this._horizRightHair.set_width(length);
|
|
this._vertTopHair.set_height(length);
|
|
this._vertBottomHair.set_height(length);
|
|
this.reCenter();
|
|
}
|
|
|
|
/**
|
|
* getLength:
|
|
* Get the length of the vertical and horizontal lines in the crosshairs.
|
|
* @returns {number} The length of the crosshairs.
|
|
*/
|
|
getLength() {
|
|
return this._horizLeftHair.get_width();
|
|
}
|
|
|
|
/**
|
|
* setClip:
|
|
* Set the width and height of the rectangle that clips the crosshairs at
|
|
* their intersection
|
|
* @param {number[]} size: Array of [width, height] defining the size
|
|
* of the clip rectangle.
|
|
*/
|
|
setClip(size) {
|
|
if (size) {
|
|
// Take a chunk out of the crosshairs where it intersects the
|
|
// mouse.
|
|
this._clipSize = size;
|
|
this.reCenter();
|
|
} else {
|
|
// Restore the missing chunk.
|
|
this._clipSize = [0, 0];
|
|
this.reCenter();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* reCenter:
|
|
* Reposition the horizontal and vertical hairs such that they cross at
|
|
* the center of crosshairs group. If called with the dimensions of
|
|
* the clip rectangle, these are used to update the size of the clip.
|
|
* @param {number[]=} clipSize: If present, the clip's [width, height].
|
|
*/
|
|
reCenter(clipSize) {
|
|
let [groupWidth, groupHeight] = this.get_size();
|
|
let leftLength = this._horizLeftHair.get_width();
|
|
let topLength = this._vertTopHair.get_height();
|
|
let thickness = this._horizLeftHair.get_height();
|
|
|
|
// Deal with clip rectangle.
|
|
if (clipSize)
|
|
this._clipSize = clipSize;
|
|
let clipWidth = this._clipSize[0];
|
|
let clipHeight = this._clipSize[1];
|
|
|
|
let left = groupWidth / 2 - clipWidth / 2 - leftLength - thickness / 2;
|
|
let right = groupWidth / 2 + clipWidth / 2 + thickness / 2;
|
|
let top = groupHeight / 2 - clipHeight / 2 - topLength - thickness / 2;
|
|
let bottom = groupHeight / 2 + clipHeight / 2 + thickness / 2;
|
|
this._horizLeftHair.set_position(left, (groupHeight - thickness) / 2);
|
|
this._horizRightHair.set_position(right, (groupHeight - thickness) / 2);
|
|
this._vertTopHair.set_position((groupWidth - thickness) / 2, top);
|
|
this._vertBottomHair.set_position((groupWidth - thickness) / 2, bottom);
|
|
}
|
|
});
|
|
|
|
var MagShaderEffects = class MagShaderEffects {
|
|
constructor(uiGroupClone) {
|
|
this._inverse = new Shell.InvertLightnessEffect();
|
|
this._brightnessContrast = new Clutter.BrightnessContrastEffect();
|
|
this._colorDesaturation = new Clutter.DesaturateEffect();
|
|
this._inverse.set_enabled(false);
|
|
this._brightnessContrast.set_enabled(false);
|
|
|
|
this._magView = uiGroupClone;
|
|
this._magView.add_effect(this._inverse);
|
|
this._magView.add_effect(this._brightnessContrast);
|
|
this._magView.add_effect(this._colorDesaturation);
|
|
}
|
|
|
|
/**
|
|
* destroyEffects:
|
|
* Remove contrast and brightness effects from the magnified view, and
|
|
* lose the reference to the actor they were applied to. Don't use this
|
|
* object after calling this.
|
|
*/
|
|
destroyEffects() {
|
|
this._magView.clear_effects();
|
|
this._colorDesaturation = null;
|
|
this._brightnessContrast = null;
|
|
this._inverse = null;
|
|
this._magView = null;
|
|
}
|
|
|
|
/**
|
|
* setInvertLightness:
|
|
* Enable/disable invert lightness effect.
|
|
* @param {bool} invertFlag: Enabled flag.
|
|
*/
|
|
setInvertLightness(invertFlag) {
|
|
this._inverse.set_enabled(invertFlag);
|
|
}
|
|
|
|
setColorSaturation(factor) {
|
|
this._colorDesaturation.set_factor(1.0 - factor);
|
|
}
|
|
|
|
/**
|
|
* setBrightness:
|
|
* Set the brightness of the magnified view.
|
|
* @param {Object} brightness: Object containing the contrast for the
|
|
* red, green, and blue channels. Values of 0.0 represent "standard"
|
|
* brightness (no change), whereas values less or greater than
|
|
* 0.0 indicate decreased or incresaed brightness, respectively.
|
|
*
|
|
* {number} brightness.r - the red component
|
|
* {number} brightness.g - the green component
|
|
* {number} brightness.b - the blue component
|
|
*/
|
|
setBrightness(brightness) {
|
|
let bRed = brightness.r;
|
|
let bGreen = brightness.g;
|
|
let bBlue = brightness.b;
|
|
this._brightnessContrast.set_brightness_full(bRed, bGreen, bBlue);
|
|
|
|
// Enable the effect if the brightness OR contrast change are such that
|
|
// it modifies the brightness and/or contrast.
|
|
let [cRed, cGreen, cBlue] = this._brightnessContrast.get_contrast();
|
|
this._brightnessContrast.set_enabled(
|
|
bRed !== NO_CHANGE || bGreen !== NO_CHANGE || bBlue !== NO_CHANGE ||
|
|
cRed !== NO_CHANGE || cGreen !== NO_CHANGE || cBlue !== NO_CHANGE);
|
|
}
|
|
|
|
/**
|
|
* Set the contrast of the magnified view.
|
|
* @param {Object} contrast: Object containing the contrast for the
|
|
* red, green, and blue channels. Values of 0.0 represent "standard"
|
|
* contrast (no change), whereas values less or greater than
|
|
* 0.0 indicate decreased or incresaed contrast, respectively.
|
|
*
|
|
* {number} contrast.r - the red component
|
|
* {number} contrast.g - the green component
|
|
* {number} contrast.b - the blue component
|
|
*/
|
|
setContrast(contrast) {
|
|
let cRed = contrast.r;
|
|
let cGreen = contrast.g;
|
|
let cBlue = contrast.b;
|
|
|
|
this._brightnessContrast.set_contrast_full(cRed, cGreen, cBlue);
|
|
|
|
// Enable the effect if the contrast OR brightness change are such that
|
|
// it modifies the brightness and/or contrast.
|
|
// should be able to use Clutter.color_equal(), but that complains of
|
|
// a null first argument.
|
|
let [bRed, bGreen, bBlue] = this._brightnessContrast.get_brightness();
|
|
this._brightnessContrast.set_enabled(
|
|
cRed !== NO_CHANGE || cGreen !== NO_CHANGE || cBlue !== NO_CHANGE ||
|
|
bRed !== NO_CHANGE || bGreen !== NO_CHANGE || bBlue !== NO_CHANGE);
|
|
}
|
|
};
|