gnome-shell/js/ui/screenshot.js
Florian Müllner 3b1330880f cleanup: Use Function.prototype.bind()
When not using arrow notation with anonymous functions, we use Lang.bind()
to bind `this` to named callbacks. However since ES5, this functionality
is already provided by Function.prototype.bind() - in fact, Lang.bind()
itself uses it when no extra arguments are specified. Just use the built-in
function directly where possible, and use arrow notation in the few places
where we pass additional arguments.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/23
2018-02-21 13:55:02 +00:00

374 lines
13 KiB
JavaScript

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Gdk = imports.gi.Gdk;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;
const Gtk = imports.gi.Gtk;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const St = imports.gi.St;
const GrabHelper = imports.ui.grabHelper;
const Lightbox = imports.ui.lightbox;
const Main = imports.ui.main;
const Tweener = imports.ui.tweener;
const ScreenshotIface = '<node> \
<interface name="org.gnome.Shell.Screenshot"> \
<method name="ScreenshotArea"> \
<arg type="i" direction="in" name="x"/> \
<arg type="i" direction="in" name="y"/> \
<arg type="i" direction="in" name="width"/> \
<arg type="i" direction="in" name="height"/> \
<arg type="b" direction="in" name="flash"/> \
<arg type="s" direction="in" name="filename"/> \
<arg type="b" direction="out" name="success"/> \
<arg type="s" direction="out" name="filename_used"/> \
</method> \
<method name="ScreenshotWindow"> \
<arg type="b" direction="in" name="include_frame"/> \
<arg type="b" direction="in" name="include_cursor"/> \
<arg type="b" direction="in" name="flash"/> \
<arg type="s" direction="in" name="filename"/> \
<arg type="b" direction="out" name="success"/> \
<arg type="s" direction="out" name="filename_used"/> \
</method> \
<method name="Screenshot"> \
<arg type="b" direction="in" name="include_cursor"/> \
<arg type="b" direction="in" name="flash"/> \
<arg type="s" direction="in" name="filename"/> \
<arg type="b" direction="out" name="success"/> \
<arg type="s" direction="out" name="filename_used"/> \
</method> \
<method name="SelectArea"> \
<arg type="i" direction="out" name="x"/> \
<arg type="i" direction="out" name="y"/> \
<arg type="i" direction="out" name="width"/> \
<arg type="i" direction="out" name="height"/> \
</method> \
<method name="FlashArea"> \
<arg type="i" direction="in" name="x"/> \
<arg type="i" direction="in" name="y"/> \
<arg type="i" direction="in" name="width"/> \
<arg type="i" direction="in" name="height"/> \
</method> \
</interface> \
</node>';
var ScreenshotService = new Lang.Class({
Name: 'ScreenshotService',
_init() {
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) {
let sender = invocation.get_sender();
if (this._screenShooter.has(sender) ||
this._lockdownSettings.get_boolean('disable-save-to-disk')) {
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(obj, 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, callback] = 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,
(obj, result, area, filenameUsed) => {
this._onScreenshotComplete(obj, result, area, filenameUsed,
flash, invocation);
});
},
ScreenshotWindowAsync(params, invocation) {
let [include_frame, include_cursor, flash, filename] = params;
let screenshot = this._createScreenshot(invocation);
if (!screenshot)
return;
screenshot.screenshot_window (include_frame, include_cursor, filename,
(obj, result, area, filenameUsed) => {
this._onScreenshotComplete(obj, result, area, filenameUsed,
flash, invocation);
});
},
ScreenshotAsync(params, invocation) {
let [include_cursor, flash, filename] = params;
let screenshot = this._createScreenshot(invocation);
if (!screenshot)
return;
screenshot.screenshot(include_cursor, filename,
(obj, result, area, filenameUsed) => {
this._onScreenshotComplete(obj, result, area, filenameUsed,
flash, invocation);
});
},
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);
}
});
var SelectArea = new Lang.Class({
Name: 'SelectArea',
_init() {
this._startX = -1;
this._startY = -1;
this._lastX = 0;
this._lastY = 0;
this._result = null;
this._initRubberbandColors();
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 Clutter.Rectangle({ color: this._background,
has_border: true,
border_width: 1,
border_color: this._border });
this._group.add_actor(this._rubberband);
},
show() {
if (!this._grabHelper.grab({ actor: this._group,
onUngrab: this._onUngrab.bind(this) }))
return;
global.screen.set_cursor(Meta.Cursor.CROSSHAIR);
Main.uiGroup.set_child_above_sibling(this._group, null);
this._group.visible = true;
},
_initRubberbandColors() {
function colorFromRGBA(rgba) {
return new Clutter.Color({ red: rgba.red * 255,
green: rgba.green * 255,
blue: rgba.blue * 255,
alpha: rgba.alpha * 255 });
}
let path = new Gtk.WidgetPath();
path.append_type(Gtk.IconView);
let context = new Gtk.StyleContext();
context.set_path(path);
context.add_class('rubberband');
this._background = colorFromRGBA(context.get_background_color(Gtk.StateFlags.NORMAL));
this._border = colorFromRGBA(context.get_border_color(Gtk.StateFlags.NORMAL));
},
_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)
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);
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(actor, event) {
this._result = this._getGeometry();
Tweener.addTween(this._group,
{ opacity: 0,
time: 0.2,
transition: 'easeOutQuad',
onComplete: () => {
this._grabHelper.ungrab();
}
});
return Clutter.EVENT_PROPAGATE;
},
_onUngrab() {
global.screen.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 FLASHSPOT_ANIMATION_OUT_TIME = 0.5; // seconds
var Flashspot = new Lang.Class({
Name: 'Flashspot',
Extends: Lightbox.Lightbox,
_init(area) {
this.parent(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;
Tweener.addTween(this.actor,
{ opacity: 0,
time: FLASHSPOT_ANIMATION_OUT_TIME,
transition: 'easeOutQuad',
onComplete: () => {
if (doneCallback)
doneCallback();
this.destroy();
}
});
}
});