/usr/share/gnome-shell/js/ui/xdndHandler.js is in gnome-shell-common 3.4.1-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | // -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const Shell = imports.gi.Shell;
const Signals = imports.signals;
const DND = imports.ui.dnd;
const XdndHandler = new Lang.Class({
Name: 'XdndHandler',
_init: function() {
// Used to display a clone of the cursor window when the
// window group is hidden (like it happens in the overview)
this._cursorWindowClone = null;
// Used as a drag actor in case we don't have a cursor window clone
this._dummy = new Clutter.Rectangle({ width: 1, height: 1, opacity: 0 });
global.stage.add_actor(this._dummy);
Shell.util_set_hidden_from_pick(this._dummy, true);
this._dummy.hide();
// Mutter delays the creation of the output window as long
// as possible to avoid flicker. In case a plugin wants to
// access it directly it has to connect to the stage's show
// signal. (see comment in compositor.c:meta_compositor_manage_screen)
global.stage.connect('show', function () {
global.init_xdnd();
return false;
});
global.connect('xdnd-enter', Lang.bind(this, this._onEnter));
global.connect('xdnd-position-changed', Lang.bind(this, this._onPositionChanged));
global.connect('xdnd-leave', Lang.bind(this, this._onLeave));
this._windowGroupVisibilityHandlerId = 0;
},
// Called when the user cancels the drag (i.e release the button)
_onLeave: function() {
if (this._windowGroupVisibilityHandlerId != 0) {
global.window_group.disconnect(this._windowGroupVisibilityHandlerId);
this._windowGroupVisibilityHandlerId = 0;
}
if (this._cursorWindowClone) {
this._cursorWindowClone.destroy();
this._cursorWindowClone = null;
}
this.emit('drag-end');
},
_onEnter: function() {
this._windowGroupVisibilityHandlerId =
global.window_group.connect('notify::visible',
Lang.bind(this, this._onWindowGroupVisibilityChanged));
this.emit('drag-begin', global.get_current_time());
},
_onWindowGroupVisibilityChanged: function() {
if (!global.window_group.visible) {
if (this._cursorWindowClone)
return;
let windows = global.get_window_actors();
let cursorWindow = windows[windows.length - 1];
// FIXME: more reliable way?
if (!cursorWindow.is_override_redirect())
return;
let constraint_position = new Clutter.BindConstraint({ coordinate : Clutter.BindCoordinate.POSITION,
source: cursorWindow});
this._cursorWindowClone = new Clutter.Clone({ source: cursorWindow });
global.overlay_group.add_actor(this._cursorWindowClone);
Shell.util_set_hidden_from_pick(this._cursorWindowClone, true);
// Make sure that the clone has the same position as the source
this._cursorWindowClone.add_constraint(constraint_position);
} else {
if (this._cursorWindowClone) {
this._cursorWindowClone.destroy();
this._cursorWindowClone = null;
}
}
},
_onPositionChanged: function(obj, x, y) {
let pickedActor = global.stage.get_actor_at_pos(Clutter.PickMode.ALL, x, y);
// Make sure that the cursor window is on top
if (this._cursorWindowClone)
this._cursorWindowClone.raise_top();
let dragEvent = {
x: x,
y: y,
dragActor: this._cursorWindowClone ? this._cursorWindowClone : this._dummy,
source: this,
targetActor: pickedActor
};
for (let i = 0; i < DND.dragMonitors.length; i++) {
let motionFunc = DND.dragMonitors[i].dragMotion;
if (motionFunc) {
let result = motionFunc(dragEvent);
if (result != DND.DragMotionResult.CONTINUE)
return;
}
}
while (pickedActor) {
if (pickedActor._delegate && pickedActor._delegate.handleDragOver) {
let [r, targX, targY] = pickedActor.transform_stage_point(x, y);
let result = pickedActor._delegate.handleDragOver(this,
dragEvent.dragActor,
targX,
targY,
global.get_current_time());
if (result != DND.DragMotionResult.CONTINUE)
return;
}
pickedActor = pickedActor.get_parent();
}
}
});
Signals.addSignalMethods(XdndHandler.prototype);
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