[gnome-shell/wip/carlosg/osk-gesture-feedback: 2/3] keyboard: Make OSK follow gesture progress

[Carlos Garnacho <carlosg src gnome org>]

commit d1f9def7196c408c4fedb2ff301e96ed7cce16ea
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Feb 12 00:54:55 2021 +0100

    keyboard: Make OSK follow gesture progress
    
    With all other gestures offering live feedback of progress, seems
    to make sense to update the "swipe from bottom edge to show OSK"
    gesture as well.

 js/ui/keyboard.js | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/keyboard.js b/js/ui/keyboard.js
index ae3cdd35c2..50a1cd7f44 100644
--- a/js/ui/keyboard.js
+++ b/js/ui/keyboard.js
@@ -1148,7 +1148,10 @@ var KeyboardManager = class KeyBoardManager {
         const mode = Shell.ActionMode.ALL & ~Shell.ActionMode.LOCK_SCREEN;
         const bottomDragAction = new EdgeDragAction.EdgeDragAction(St.Side.BOTTOM, mode);
         bottomDragAction.connect('activated', () => {
-            this.open(Main.layoutManager.bottomIndex);
+            this._keyboard.gestureActivate(Main.layoutManager.bottomIndex);
+        });
+        bottomDragAction.connect('progress', (_action, progress) => {
+            this._keyboard.gestureProgress(progress);
         });
         global.stage.add_action(bottomDragAction);
         this._bottomDragAction = bottomDragAction;
@@ -1725,7 +1728,7 @@ var Keyboard = GObject.registerClass({
         this._keyboardRestingId = 0;
     }
 
-    open() {
+    open(immediate = false) {
         this._clearShowIdle();
         this._keyboardRequested = true;
 
@@ -1734,6 +1737,11 @@ var Keyboard = GObject.registerClass({
             return;
         }
 
+        if (immediate) {
+            this._open();
+            return;
+        }
+
         this._clearKeyboardRestTimer();
         this._keyboardRestingId = GLib.timeout_add(GLib.PRIORITY_DEFAULT,
             KEYBOARD_REST_TIME,
@@ -1835,6 +1843,21 @@ var Keyboard = GObject.registerClass({
         Main.layoutManager.keyboardBox.hide();
     }
 
+    gestureProgress(delta) {
+        Main.layoutManager.keyboardBox.show();
+        let progress = Math.min(delta, this.height) / this.height;
+        this.translation_y = -this.height * progress;
+        this.opacity = 255 * progress;
+        if (this._focusWindow) {
+            const windowActor = this._focusWindow.get_compositor_private();
+            windowActor.translation_y = -this.height * progress;
+        }
+    }
+
+    gestureActivate() {
+        this.open(true);
+    }
+
     resetSuggestions() {
         if (this._suggestions)
             this._suggestions.clear();