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skel/.local/share/gnome-shell/extensions/dash-to-dock@micxgx.gmail.com/intellihide.js

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+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+
+const GLib = imports.gi.GLib;
+const Mainloop = imports.mainloop;
+const Meta = imports.gi.Meta;
+const Shell = imports.gi.Shell;
+
+const Main = imports.ui.main;
+const Signals = imports.signals;
+
+const Me = imports.misc.extensionUtils.getCurrentExtension();
+const Docking = Me.imports.docking;
+const Utils = Me.imports.utils;
+
+// A good compromise between reactivity and efficiency; to be tuned.
+const INTELLIHIDE_CHECK_INTERVAL = 100;
+
+const OverlapStatus = {
+    UNDEFINED: -1,
+    FALSE: 0,
+    TRUE: 1
+};
+
+const IntellihideMode = {
+    ALL_WINDOWS: 0,
+    FOCUS_APPLICATION_WINDOWS: 1,
+    MAXIMIZED_WINDOWS : 2
+};
+
+// List of windows type taken into account. Order is important (keep the original
+// enum order).
+const handledWindowTypes = [
+    Meta.WindowType.NORMAL,
+    Meta.WindowType.DOCK,
+    Meta.WindowType.DIALOG,
+    Meta.WindowType.MODAL_DIALOG,
+    Meta.WindowType.TOOLBAR,
+    Meta.WindowType.MENU,
+    Meta.WindowType.UTILITY,
+    Meta.WindowType.SPLASHSCREEN
+];
+
+/**
+ * A rough and ugly implementation of the intellihide behaviour.
+ * Intallihide object: emit 'status-changed' signal when the overlap of windows
+ * with the provided targetBoxClutter.ActorBox changes;
+ */
+var Intellihide = class DashToDock_Intellihide {
+
+    constructor(monitorIndex) {
+        // Load settings
+        this._monitorIndex = monitorIndex;
+
+        this._signalsHandler = new Utils.GlobalSignalsHandler();
+        this._tracker = Shell.WindowTracker.get_default();
+        this._focusApp = null; // The application whose window is focused.
+        this._topApp = null; // The application whose window is on top on the monitor with the dock.
+
+        this._isEnabled = false;
+        this.status = OverlapStatus.UNDEFINED;
+        this._targetBox = null;
+
+        this._checkOverlapTimeoutContinue = false;
+        this._checkOverlapTimeoutId = 0;
+
+        this._trackedWindows = new Map();
+
+        // Connect global signals
+        this._signalsHandler.add([
+            // Add signals on windows created from now on
+            global.display,
+            'window-created',
+            this._windowCreated.bind(this)
+        ], [
+            // triggered for instance when the window list order changes,
+            // included when the workspace is switched
+            global.display,
+            'restacked',
+            this._checkOverlap.bind(this)
+        ], [
+            // when windows are alwasy on top, the focus window can change
+            // without the windows being restacked. Thus monitor window focus change.
+            this._tracker,
+            'notify::focus-app',
+            this._checkOverlap.bind(this)
+        ], [
+            // update wne monitor changes, for instance in multimonitor when monitor are attached
+            Meta.MonitorManager.get(),
+            'monitors-changed',
+            this._checkOverlap.bind(this)
+        ]);
+    }
+
+    destroy() {
+        // Disconnect global signals
+        this._signalsHandler.destroy();
+
+        // Remove  residual windows signals
+        this.disable();
+    }
+
+    enable() {
+        this._isEnabled = true;
+        this._status = OverlapStatus.UNDEFINED;
+        global.get_window_actors().forEach(function(wa) {
+            this._addWindowSignals(wa);
+        }, this);
+        this._doCheckOverlap();
+    }
+
+    disable() {
+        this._isEnabled = false;
+
+        for (let wa of this._trackedWindows.keys()) {
+            this._removeWindowSignals(wa);
+        }
+        this._trackedWindows.clear();
+
+        if (this._checkOverlapTimeoutId > 0) {
+            Mainloop.source_remove(this._checkOverlapTimeoutId);
+            this._checkOverlapTimeoutId = 0;
+        }
+    }
+
+    _windowCreated(display, metaWindow) {
+        this._addWindowSignals(metaWindow.get_compositor_private());
+    }
+
+    _addWindowSignals(wa) {
+        if (!this._handledWindow(wa))
+            return;
+        let signalId = wa.connect('allocation-changed', this._checkOverlap.bind(this));
+        this._trackedWindows.set(wa, signalId);
+        wa.connect('destroy', this._removeWindowSignals.bind(this));
+    }
+
+    _removeWindowSignals(wa) {
+        if (this._trackedWindows.get(wa)) {
+           wa.disconnect(this._trackedWindows.get(wa));
+           this._trackedWindows.delete(wa);
+        }
+
+    }
+
+    updateTargetBox(box) {
+        this._targetBox = box;
+        this._checkOverlap();
+    }
+
+    forceUpdate() {
+        this._status = OverlapStatus.UNDEFINED;
+        this._doCheckOverlap();
+    }
+
+    getOverlapStatus() {
+        return (this._status == OverlapStatus.TRUE);
+    }
+
+    _checkOverlap() {
+        if (!this._isEnabled || (this._targetBox == null))
+            return;
+
+        /* Limit the number of calls to the doCheckOverlap function */
+        if (this._checkOverlapTimeoutId) {
+            this._checkOverlapTimeoutContinue = true;
+            return
+        }
+
+        this._doCheckOverlap();
+
+        this._checkOverlapTimeoutId = Mainloop.timeout_add(INTELLIHIDE_CHECK_INTERVAL, () => {
+            this._doCheckOverlap();
+            if (this._checkOverlapTimeoutContinue) {
+                this._checkOverlapTimeoutContinue = false;
+                return GLib.SOURCE_CONTINUE;
+            } else {
+                this._checkOverlapTimeoutId = 0;
+                return GLib.SOURCE_REMOVE;
+            }
+        });
+    }
+
+    _doCheckOverlap() {
+
+        if (!this._isEnabled || (this._targetBox == null))
+            return;
+
+        let overlaps = OverlapStatus.FALSE;
+        let windows = global.get_window_actors();
+
+        if (windows.length > 0) {
+            /*
+             * Get the top window on the monitor where the dock is placed.
+             * The idea is that we dont want to overlap with the windows of the topmost application,
+             * event is it's not the focused app -- for instance because in multimonitor the user
+             * select a window in the secondary monitor.
+             */
+
+            let topWindow = null;
+            for (let i = windows.length - 1; i >= 0; i--) {
+                let meta_win = windows[i].get_meta_window();
+                if (this._handledWindow(windows[i]) && (meta_win.get_monitor() == this._monitorIndex)) {
+                    topWindow = meta_win;
+                    break;
+                }
+            }
+
+            if (topWindow !== null) {
+                this._topApp = this._tracker.get_window_app(topWindow);
+                // If there isn't a focused app, use that of the window on top
+                this._focusApp = this._tracker.focus_app || this._topApp
+
+                windows = windows.filter(this._intellihideFilterInteresting, this);
+
+                for (let i = 0;  i < windows.length; i++) {
+                    let win = windows[i].get_meta_window();
+
+                    if (win) {
+                        let rect = win.get_frame_rect();
+
+                        let test = (rect.x < this._targetBox.x2) &&
+                                   (rect.x + rect.width > this._targetBox.x1) &&
+                                   (rect.y < this._targetBox.y2) &&
+                                   (rect.y + rect.height > this._targetBox.y1);
+
+                        if (test) {
+                            overlaps = OverlapStatus.TRUE;
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+
+        if (this._status !== overlaps) {
+            this._status = overlaps;
+            this.emit('status-changed', this._status);
+        }
+
+    }
+
+    // Filter interesting windows to be considered for intellihide.
+    // Consider all windows visible on the current workspace.
+    // Optionally skip windows of other applications
+    _intellihideFilterInteresting(wa) {
+        let meta_win = wa.get_meta_window();
+        if (!this._handledWindow(wa))
+            return false;
+
+        let currentWorkspace = global.workspace_manager.get_active_workspace_index();
+        let wksp = meta_win.get_workspace();
+        let wksp_index = wksp.index();
+
+        // Depending on the intellihide mode, exclude non-relevent windows
+        switch (Docking.DockManager.settings.get_enum('intellihide-mode')) {
+            case IntellihideMode.ALL_WINDOWS:
+                // Do nothing
+                break;
+
+            case IntellihideMode.FOCUS_APPLICATION_WINDOWS:
+                // Skip windows of other apps
+                if (this._focusApp) {
+                    // The DropDownTerminal extension is not an application per se
+                    // so we match its window by wm class instead
+                    if (meta_win.get_wm_class() == 'DropDownTerminalWindow')
+                        return true;
+
+                    let currentApp = this._tracker.get_window_app(meta_win);
+                    let focusWindow = global.display.get_focus_window()
+
+                    // Consider half maximized windows side by side
+                    // and windows which are alwayson top
+                    if((currentApp != this._focusApp) && (currentApp != this._topApp)
+                        && !((focusWindow && focusWindow.maximized_vertically && !focusWindow.maximized_horizontally)
+                              && (meta_win.maximized_vertically && !meta_win.maximized_horizontally)
+                              && meta_win.get_monitor() == focusWindow.get_monitor())
+                        && !meta_win.is_above())
+                        return false;
+                }
+                break;
+
+            case IntellihideMode.MAXIMIZED_WINDOWS:
+                // Skip unmaximized windows
+                if (!meta_win.maximized_vertically && !meta_win.maximized_horizontally)
+                    return false;
+                break;
+        }
+
+        if ( wksp_index == currentWorkspace && meta_win.showing_on_its_workspace() )
+            return true;
+        else
+            return false;
+
+    }
+
+    // Filter windows by type
+    // inspired by Opacify@gnome-shell.localdomain.pl
+    _handledWindow(wa) {
+        let metaWindow = wa.get_meta_window();
+
+        if (!metaWindow)
+            return false;
+
+        // The DropDownTerminal extension uses the POPUP_MENU window type hint
+        // so we match its window by wm class instead
+        if (metaWindow.get_wm_class() == 'DropDownTerminalWindow')
+            return true;
+
+        let wtype = metaWindow.get_window_type();
+        for (let i = 0; i < handledWindowTypes.length; i++) {
+            var hwtype = handledWindowTypes[i];
+            if (hwtype == wtype)
+                return true;
+            else if (hwtype > wtype)
+                return false;
+        }
+        return false;
+    }
+};
+
+Signals.addSignalMethods(Intellihide.prototype);