Adding upstream version 3.38.6.upstream/3.38.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 194 insertions, 0 deletions

diff --git a/js/ui/pageIndicators.js b/js/ui/pageIndicators.js
new file mode 100644
index 0000000..8ac44d4
--- /dev/null
+++ b/js/ui/pageIndicators.js
@@ -0,0 +1,194 @@
+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+/* exported PageIndicators, AnimatedPageIndicators */
+
+const { Clutter, GLib, Graphene, GObject, Meta, St } = imports.gi;
+
+const { ANIMATION_TIME_OUT, ANIMATION_MAX_DELAY_OUT_FOR_ITEM, AnimationDirection } = imports.ui.iconGrid;
+
+const INDICATOR_INACTIVE_OPACITY = 128;
+const INDICATOR_INACTIVE_OPACITY_HOVER = 255;
+const INDICATOR_INACTIVE_SCALE = 2 / 3;
+const INDICATOR_INACTIVE_SCALE_PRESSED = 0.5;
+
+var INDICATORS_BASE_TIME = 250;
+var INDICATORS_BASE_TIME_OUT = 125;
+var INDICATORS_ANIMATION_DELAY = 125;
+var INDICATORS_ANIMATION_DELAY_OUT = 62.5;
+var INDICATORS_ANIMATION_MAX_TIME = 750;
+var SWITCH_TIME = 400;
+var INDICATORS_ANIMATION_MAX_TIME_OUT =
+    Math.min(SWITCH_TIME,
+             ANIMATION_TIME_OUT + ANIMATION_MAX_DELAY_OUT_FOR_ITEM);
+
+var ANIMATION_DELAY = 100;
+
+var PageIndicators = GObject.registerClass({
+    Signals: { 'page-activated': { param_types: [GObject.TYPE_INT] } },
+}, class PageIndicators extends St.BoxLayout {
+    _init(orientation = Clutter.Orientation.VERTICAL) {
+        let vertical = orientation == Clutter.Orientation.VERTICAL;
+        super._init({
+            style_class: 'page-indicators',
+            vertical,
+            x_expand: true, y_expand: true,
+            x_align: vertical ? Clutter.ActorAlign.END : Clutter.ActorAlign.CENTER,
+            y_align: vertical ? Clutter.ActorAlign.CENTER : Clutter.ActorAlign.END,
+            reactive: true,
+            clip_to_allocation: true,
+        });
+        this._nPages = 0;
+        this._currentPosition = 0;
+        this._reactive = true;
+        this._reactive = true;
+    }
+
+    vfunc_get_preferred_height(forWidth) {
+        // We want to request the natural height of all our children as our
+        // natural height, so we chain up to St.BoxLayout, but we only request 0
+        // as minimum height, since it's not that important if some indicators
+        // are not shown
+        let [, natHeight] = super.vfunc_get_preferred_height(forWidth);
+        return [0, natHeight];
+    }
+
+    setReactive(reactive) {
+        let children = this.get_children();
+        for (let i = 0; i < children.length; i++)
+            children[i].reactive = reactive;
+
+        this._reactive = reactive;
+    }
+
+    setNPages(nPages) {
+        if (this._nPages == nPages)
+            return;
+
+        let diff = nPages - this._nPages;
+        if (diff > 0) {
+            for (let i = 0; i < diff; i++) {
+                let pageIndex = this._nPages + i;
+                let indicator = new St.Button({ style_class: 'page-indicator',
+                                                button_mask: St.ButtonMask.ONE |
+                                                             St.ButtonMask.TWO |
+                                                             St.ButtonMask.THREE,
+                                                reactive: this._reactive });
+                indicator.child = new St.Widget({
+                    style_class: 'page-indicator-icon',
+                    pivot_point: new Graphene.Point({ x: 0.5, y: 0.5 }),
+                });
+                indicator.connect('clicked', () => {
+                    this.emit('page-activated', pageIndex);
+                });
+                indicator.connect('notify::hover', () => {
+                    this._updateIndicator(indicator, pageIndex);
+                });
+                indicator.connect('notify::pressed', () => {
+                    this._updateIndicator(indicator, pageIndex);
+                });
+                this._updateIndicator(indicator, pageIndex);
+                this.add_actor(indicator);
+            }
+        } else {
+            let children = this.get_children().splice(diff);
+            for (let i = 0; i < children.length; i++)
+                children[i].destroy();
+        }
+        this._nPages = nPages;
+        this.visible = this._nPages > 1;
+    }
+
+    _updateIndicator(indicator, pageIndex) {
+        let progress =
+            Math.max(1 - Math.abs(this._currentPosition - pageIndex), 0);
+
+        let inactiveScale = indicator.pressed
+            ? INDICATOR_INACTIVE_SCALE_PRESSED : INDICATOR_INACTIVE_SCALE;
+        let inactiveOpacity = indicator.hover
+            ? INDICATOR_INACTIVE_OPACITY_HOVER : INDICATOR_INACTIVE_OPACITY;
+
+        let scale = inactiveScale + (1 - inactiveScale) * progress;
+        let opacity = inactiveOpacity + (255 - inactiveOpacity) * progress;
+
+        indicator.child.set_scale(scale, scale);
+        indicator.child.opacity = opacity;
+    }
+
+    setCurrentPosition(currentPosition) {
+        this._currentPosition = currentPosition;
+
+        let children = this.get_children();
+        for (let i = 0; i < children.length; i++)
+            this._updateIndicator(children[i], i);
+    }
+
+    get nPages() {
+        return this._nPages;
+    }
+});
+
+var AnimatedPageIndicators = GObject.registerClass(
+class AnimatedPageIndicators extends PageIndicators {
+    _init() {
+        super._init();
+        this.connect('destroy', this._onDestroy.bind(this));
+    }
+
+    _onDestroy() {
+        if (this.animateLater) {
+            Meta.later_remove(this.animateLater);
+            this.animateLater = 0;
+        }
+    }
+
+    vfunc_map() {
+        super.vfunc_map();
+
+        // Implicit animations are skipped for unmapped actors, and our
+        // children aren't mapped yet, so defer to a later handler
+        this.animateLater = Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
+            this.animateLater = 0;
+            this.animateIndicators(AnimationDirection.IN);
+            return GLib.SOURCE_REMOVE;
+        });
+    }
+
+    animateIndicators(animationDirection) {
+        if (!this.mapped)
+            return;
+
+        let children = this.get_children();
+        if (children.length == 0)
+            return;
+
+        for (let i = 0; i < this._nPages; i++)
+            children[i].remove_all_transitions();
+
+        let offset;
+        if (this.get_text_direction() == Clutter.TextDirection.RTL)
+            offset = -children[0].width;
+        else
+            offset = children[0].width;
+
+        let isAnimationIn = animationDirection == AnimationDirection.IN;
+        let delay = isAnimationIn
+            ? INDICATORS_ANIMATION_DELAY
+            : INDICATORS_ANIMATION_DELAY_OUT;
+        let baseTime = isAnimationIn ? INDICATORS_BASE_TIME : INDICATORS_BASE_TIME_OUT;
+        let totalAnimationTime = baseTime + delay * this._nPages;
+        let maxTime = isAnimationIn
+            ? INDICATORS_ANIMATION_MAX_TIME
+            : INDICATORS_ANIMATION_MAX_TIME_OUT;
+        if (totalAnimationTime > maxTime)
+            delay -= (totalAnimationTime - maxTime) / this._nPages;
+
+        for (let i = 0; i < this._nPages; i++) {
+            children[i].translation_x = isAnimationIn ? offset : 0;
+            children[i].ease({
+                translation_x: isAnimationIn ? 0 : offset,
+                duration: baseTime + delay * i,
+                mode: Clutter.AnimationMode.EASE_IN_OUT_QUAD,
+                delay: isAnimationIn ? ANIMATION_DELAY : 0,
+            });
+        }
+    }
+});