1 files changed, 134 insertions, 0 deletions
diff --git a/js/ui/pointerA11yTimeout.js b/js/ui/pointerA11yTimeout.js
new file mode 100644
index 0000000..263cc3e
--- /dev/null
+++ b/js/ui/pointerA11yTimeout.js
@@ -0,0 +1,134 @@
+/* exported PointerA11yTimeout */
+const { Clutter, GObject, Meta, St } = imports.gi;
+const Main = imports.ui.main;
+const Cairo = imports.cairo;
+
+const SUCCESS_ZOOM_OUT_DURATION = 150;
+
+var PieTimer = GObject.registerClass({
+    Properties: {
+        'angle': GObject.ParamSpec.double(
+            'angle', 'angle', 'angle',
+            GObject.ParamFlags.READWRITE,
+            0, 2 * Math.PI, 0),
+    },
+}, class PieTimer extends St.DrawingArea {
+    _init() {
+        this._angle = 0;
+        super._init({
+            style_class: 'pie-timer',
+            opacity: 0,
+            visible: false,
+            can_focus: false,
+            reactive: false,
+        });
+
+        this.set_pivot_point(0.5, 0.5);
+    }
+
+    get angle() {
+        return this._angle;
+    }
+
+    set angle(angle) {
+        if (this._angle == angle)
+            return;
+
+        this._angle = angle;
+        this.notify('angle');
+        this.queue_repaint();
+    }
+
+    vfunc_repaint() {
+        let node = this.get_theme_node();
+        let backgroundColor = node.get_color('-pie-background-color');
+        let borderColor = node.get_color('-pie-border-color');
+        let borderWidth = node.get_length('-pie-border-width');
+        let [width, height] = this.get_surface_size();
+        let radius = Math.min(width / 2, height / 2);
+
+        let startAngle = 3 * Math.PI / 2;
+        let endAngle = startAngle + this._angle;
+
+        let cr = this.get_context();
+        cr.setLineCap(Cairo.LineCap.ROUND);
+        cr.setLineJoin(Cairo.LineJoin.ROUND);
+        cr.translate(width / 2, height / 2);
+
+        if (this._angle < 2 * Math.PI)
+            cr.moveTo(0, 0);
+
+        cr.arc(0, 0, radius - borderWidth, startAngle, endAngle);
+
+        if (this._angle < 2 * Math.PI)
+            cr.lineTo(0, 0);
+
+        cr.closePath();
+
+        cr.setLineWidth(0);
+        Clutter.cairo_set_source_color(cr, backgroundColor);
+        cr.fillPreserve();
+
+        cr.setLineWidth(borderWidth);
+        Clutter.cairo_set_source_color(cr, borderColor);
+        cr.stroke();
+
+        cr.$dispose();
+    }
+
+    start(x, y, duration) {
+        this.x = x - this.width / 2;
+        this.y = y - this.height / 2;
+        this.show();
+
+        this.ease({
+            opacity: 255,
+            duration: duration / 4,
+            mode: Clutter.AnimationMode.EASE_IN_QUAD,
+        });
+
+        this.ease_property('angle', 2 * Math.PI, {
+            duration,
+            mode: Clutter.AnimationMode.LINEAR,
+            onComplete: this._onTransitionComplete.bind(this),
+        });
+    }
+
+    _onTransitionComplete() {
+        this.ease({
+            scale_x: 2,
+            scale_y: 2,
+            opacity: 0,
+            duration: SUCCESS_ZOOM_OUT_DURATION,
+            mode: Clutter.AnimationMode.EASE_OUT_QUAD,
+            onStopped: () => this.destroy(),
+        });
+    }
+});
+
+var PointerA11yTimeout = class PointerA11yTimeout {
+    constructor() {
+        let seat = Clutter.get_default_backend().get_default_seat();
+
+        seat.connect('ptr-a11y-timeout-started', (o, device, type, timeout) => {
+            let [x, y] = global.get_pointer();
+
+            this._pieTimer = new PieTimer();
+            Main.uiGroup.add_actor(this._pieTimer);
+            Main.uiGroup.set_child_above_sibling(this._pieTimer, null);
+
+            this._pieTimer.start(x, y, timeout);
+
+            if (type == Clutter.PointerA11yTimeoutType.GESTURE)
+                global.display.set_cursor(Meta.Cursor.CROSSHAIR);
+        });
+
+        seat.connect('ptr-a11y-timeout-stopped', (o, device, type, clicked) => {
+            if (!clicked)
+                this._pieTimer.destroy();
+
+            if (type == Clutter.PointerA11yTimeoutType.GESTURE)
+                global.display.set_cursor(Meta.Cursor.DEFAULT);
+        });
+    }
+};