gnome-shell/js/ui/screenshot.js

394 lines
14 KiB
JavaScript
Raw Permalink Normal View History

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
/* exported ScreenshotService */
const { Clutter, Gio, GLib, Meta, Shell, St } = imports.gi;
const Signals = imports.signals;
const GrabHelper = imports.ui.grabHelper;
const Lightbox = imports.ui.lightbox;
const Main = imports.ui.main;
const { loadInterfaceXML } = imports.misc.fileUtils;
const ScreenshotIface = loadInterfaceXML('org.gnome.Shell.Screenshot');
var ScreenshotService = class {
constructor() {
this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(ScreenshotIface, this);
this._dbusImpl.export(Gio.DBus.session, '/org/gnome/Shell/Screenshot');
this._screenShooter = new Map();
this._lockdownSettings = new Gio.Settings({ schema_id: 'org.gnome.desktop.lockdown' });
Gio.DBus.session.own_name('org.gnome.Shell.Screenshot', Gio.BusNameOwnerFlags.REPLACE, null, null);
}
_createScreenshot(invocation, needsDisk = true) {
let lockedDown = false;
if (needsDisk)
lockedDown = this._lockdownSettings.get_boolean('disable-save-to-disk');
let sender = invocation.get_sender();
if (this._screenShooter.has(sender) || lockedDown) {
invocation.return_value(GLib.Variant.new('(bs)', [false, '']));
return null;
}
let shooter = new Shell.Screenshot();
shooter._watchNameId =
Gio.bus_watch_name(Gio.BusType.SESSION, sender, 0, null,
this._onNameVanished.bind(this));
this._screenShooter.set(sender, shooter);
return shooter;
}
_onNameVanished(connection, name) {
this._removeShooterForSender(name);
}
_removeShooterForSender(sender) {
let shooter = this._screenShooter.get(sender);
if (!shooter)
return;
Gio.bus_unwatch_name(shooter._watchNameId);
this._screenShooter.delete(sender);
}
_checkArea(x, y, width, height) {
return x >= 0 && y >= 0 &&
width > 0 && height > 0 &&
x + width <= global.screen_width &&
y + height <= global.screen_height;
}
_onScreenshotComplete(result, area, filenameUsed, flash, invocation) {
if (result) {
if (flash) {
let flashspot = new Flashspot(area);
flashspot.fire(() => {
this._removeShooterForSender(invocation.get_sender());
});
} else {
this._removeShooterForSender(invocation.get_sender());
}
}
let retval = GLib.Variant.new('(bs)', [result, filenameUsed]);
invocation.return_value(retval);
}
_scaleArea(x, y, width, height) {
let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
x *= scaleFactor;
y *= scaleFactor;
width *= scaleFactor;
height *= scaleFactor;
return [x, y, width, height];
}
_unscaleArea(x, y, width, height) {
let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
x /= scaleFactor;
y /= scaleFactor;
width /= scaleFactor;
height /= scaleFactor;
return [x, y, width, height];
}
ScreenshotAreaAsync(params, invocation) {
let [x, y, width, height, flash, filename] = params;
[x, y, width, height] = this._scaleArea(x, y, width, height);
if (!this._checkArea(x, y, width, height)) {
invocation.return_error_literal(Gio.IOErrorEnum,
Gio.IOErrorEnum.CANCELLED,
"Invalid params");
return;
}
let screenshot = this._createScreenshot(invocation);
if (!screenshot)
return;
screenshot.screenshot_area (x, y, width, height, filename,
(o, res) => {
try {
let [result, area, filenameUsed] =
screenshot.screenshot_area_finish(res);
this._onScreenshotComplete(
result, area, filenameUsed, flash, invocation);
} catch (e) {
invocation.return_gerror (e);
}
});
}
ScreenshotWindowAsync(params, invocation) {
let [includeFrame, includeCursor, flash, filename] = params;
let screenshot = this._createScreenshot(invocation);
if (!screenshot)
return;
screenshot.screenshot_window (includeFrame, includeCursor, filename,
(o, res) => {
try {
let [result, area, filenameUsed] =
screenshot.screenshot_window_finish(res);
this._onScreenshotComplete(
result, area, filenameUsed, flash, invocation);
} catch (e) {
invocation.return_gerror (e);
}
});
}
ScreenshotAsync(params, invocation) {
let [includeCursor, flash, filename] = params;
let screenshot = this._createScreenshot(invocation);
if (!screenshot)
return;
screenshot.screenshot(includeCursor, filename,
(o, res) => {
try {
let [result, area, filenameUsed] =
screenshot.screenshot_finish(res);
this._onScreenshotComplete(
result, area, filenameUsed, flash, invocation);
} catch (e) {
invocation.return_gerror (e);
}
});
}
SelectAreaAsync(params, invocation) {
let selectArea = new SelectArea();
selectArea.show();
selectArea.connect('finished', (selectArea, areaRectangle) => {
if (areaRectangle) {
let retRectangle = this._unscaleArea(areaRectangle.x, areaRectangle.y,
areaRectangle.width, areaRectangle.height);
let retval = GLib.Variant.new('(iiii)', retRectangle);
invocation.return_value(retval);
} else {
invocation.return_error_literal(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED,
"Operation was cancelled");
}
});
}
FlashAreaAsync(params, invocation) {
let [x, y, width, height] = params;
[x, y, width, height] = this._scaleArea(x, y, width, height);
if (!this._checkArea(x, y, width, height)) {
invocation.return_error_literal(Gio.IOErrorEnum,
Gio.IOErrorEnum.CANCELLED,
"Invalid params");
return;
}
let flashspot = new Flashspot({ x: x, y: y, width: width, height: height });
flashspot.fire();
invocation.return_value(null);
}
PickColorAsync(params, invocation) {
let pickPixel = new PickPixel();
pickPixel.show();
pickPixel.connect('finished', (pickPixel, coords) => {
if (coords) {
let screenshot = this._createScreenshot(invocation, false);
if (!screenshot)
return;
screenshot.pick_color(...coords, (o, res) => {
let [success_, color] = screenshot.pick_color_finish(res);
let { red, green, blue } = color;
let retval = GLib.Variant.new('(a{sv})', [{
color: GLib.Variant.new('(ddd)', [
red / 255.0,
green / 255.0,
blue / 255.0
])
}]);
this._removeShooterForSender(invocation.get_sender());
invocation.return_value(retval);
});
} else {
invocation.return_error_literal(Gio.IOErrorEnum, Gio.IOErrorEnum.CANCELLED,
"Operation was cancelled");
}
});
}
};
var SelectArea = class {
constructor() {
this._startX = -1;
this._startY = -1;
this._lastX = 0;
this._lastY = 0;
this._result = null;
this._group = new St.Widget({ visible: false,
reactive: true,
x: 0,
y: 0 });
Main.uiGroup.add_actor(this._group);
this._grabHelper = new GrabHelper.GrabHelper(this._group);
this._group.connect('button-press-event',
this._onButtonPress.bind(this));
this._group.connect('button-release-event',
this._onButtonRelease.bind(this));
this._group.connect('motion-event',
this._onMotionEvent.bind(this));
let constraint = new Clutter.BindConstraint({ source: global.stage,
coordinate: Clutter.BindCoordinate.ALL });
this._group.add_constraint(constraint);
this._rubberband = new St.Widget({
style_class: 'select-area-rubberband',
visible: false
});
this._group.add_actor(this._rubberband);
}
show() {
if (!this._grabHelper.grab({ actor: this._group,
onUngrab: this._onUngrab.bind(this) }))
return;
global.display.set_cursor(Meta.Cursor.CROSSHAIR);
Main.uiGroup.set_child_above_sibling(this._group, null);
this._group.visible = true;
}
_getGeometry() {
return { x: Math.min(this._startX, this._lastX),
y: Math.min(this._startY, this._lastY),
width: Math.abs(this._startX - this._lastX) + 1,
height: Math.abs(this._startY - this._lastY) + 1 };
}
_onMotionEvent(actor, event) {
if (this._startX == -1 || this._startY == -1 || this._result)
return Clutter.EVENT_PROPAGATE;
[this._lastX, this._lastY] = event.get_coords();
this._lastX = Math.floor(this._lastX);
this._lastY = Math.floor(this._lastY);
let geometry = this._getGeometry();
this._rubberband.set_position(geometry.x, geometry.y);
this._rubberband.set_size(geometry.width, geometry.height);
this._rubberband.show();
return Clutter.EVENT_PROPAGATE;
}
_onButtonPress(actor, event) {
[this._startX, this._startY] = event.get_coords();
this._startX = Math.floor(this._startX);
this._startY = Math.floor(this._startY);
this._rubberband.set_position(this._startX, this._startY);
return Clutter.EVENT_PROPAGATE;
}
_onButtonRelease() {
this._result = this._getGeometry();
this._group.ease({
opacity: 0,
duration: 200,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
onComplete: () => this._grabHelper.ungrab()
});
return Clutter.EVENT_PROPAGATE;
}
_onUngrab() {
global.display.set_cursor(Meta.Cursor.DEFAULT);
this.emit('finished', this._result);
GLib.idle_add(GLib.PRIORITY_DEFAULT, () => {
this._group.destroy();
return GLib.SOURCE_REMOVE;
});
}
};
Signals.addSignalMethods(SelectArea.prototype);
var PickPixel = class {
constructor() {
this._result = null;
this._group = new St.Widget({ visible: false,
reactive: true });
Main.uiGroup.add_actor(this._group);
this._grabHelper = new GrabHelper.GrabHelper(this._group);
this._group.connect('button-release-event',
this._onButtonRelease.bind(this));
let constraint = new Clutter.BindConstraint({ source: global.stage,
coordinate: Clutter.BindCoordinate.ALL });
this._group.add_constraint(constraint);
}
show() {
if (!this._grabHelper.grab({ actor: this._group,
onUngrab: this._onUngrab.bind(this) }))
return;
global.display.set_cursor(Meta.Cursor.CROSSHAIR);
Main.uiGroup.set_child_above_sibling(this._group, null);
this._group.visible = true;
}
_onButtonRelease(actor, event) {
this._result = event.get_coords();
this._grabHelper.ungrab();
return Clutter.EVENT_PROPAGATE;
}
_onUngrab() {
global.display.set_cursor(Meta.Cursor.DEFAULT);
this.emit('finished', this._result);
GLib.idle_add(GLib.PRIORITY_DEFAULT, () => {
this._group.destroy();
return GLib.SOURCE_REMOVE;
});
}
};
Signals.addSignalMethods(PickPixel.prototype);
var FLASHSPOT_ANIMATION_OUT_TIME = 500; // milliseconds
var Flashspot = class extends Lightbox.Lightbox {
constructor(area) {
super(Main.uiGroup, { inhibitEvents: true,
width: area.width,
height: area.height });
this.actor.style_class = 'flashspot';
this.actor.set_position(area.x, area.y);
}
fire(doneCallback) {
this.actor.show();
this.actor.opacity = 255;
this.actor.ease({
opacity: 0,
duration: FLASHSPOT_ANIMATION_OUT_TIME,
mode: Clutter.AnimationMode.EASE_OUT_QUAD,
onComplete: () => {
if (doneCallback)
doneCallback();
this.destroy();
}
});
}
};