From 6a198e07c88224bfbbed4db41e2e664554903c2b Mon Sep 17 00:00:00 2001
From: Jorge Ruesga <jorge@ruesga.com>
Date: Thu, 23 May 2013 02:49:16 +0200
Subject: Trebuchet: Fix double tab on home button

Ensure that all transitions are complete while processing new intents, creating a queue
of pending intents. This way every transition is executed properly.
JIRA: CYAN-1115
Issue: https://jira.cyanogenmod.org/browse/CYAN-1115

Change-Id: I74e5e2e14cc7515acd1eeef0cfddf7161992b11b
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
---
 src/com/cyanogenmod/trebuchet/Launcher.java | 63 +++++++++++++++++++++++++----
 1 file changed, 55 insertions(+), 8 deletions(-)

diff --git a/src/com/cyanogenmod/trebuchet/Launcher.java b/src/com/cyanogenmod/trebuchet/Launcher.java
index 7569573..7208a9a 100644
--- a/src/com/cyanogenmod/trebuchet/Launcher.java
+++ b/src/com/cyanogenmod/trebuchet/Launcher.java
@@ -258,6 +258,9 @@ public final class Launcher extends Activity
     private boolean mWaitingForResult;
     private boolean mOnResumeNeedsLoad;
 
+    private final List<Runnable> mNewPendingIntents = new ArrayList<Runnable>();
+    private boolean mOnNewIntentProcessing;
+
     // Keep track of whether the user has left launcher
     private static boolean sPausedFromUserAction = false;
 
@@ -1559,15 +1562,20 @@ public final class Launcher extends Activity
                 public void run() {
                     if (mWorkspace == null) {
                         // Can be cases where mWorkspace is null, this prevents a NPE
+                        synchronized (mNewPendingIntents) {
+                            mOnNewIntentProcessing = false;
+                        }
                         return;
                     }
                     Folder openFolder = mWorkspace.getOpenFolder();
                     // In all these cases, only animate if we're already on home
                     mWorkspace.exitWidgetResizeMode();
+                    boolean waitForPendingTranstions = true;
                     if (alreadyOnHome && mState == State.WORKSPACE && !mWorkspace.isTouchActive() &&
                             openFolder == null) {
                         mWorkspace.moveToDefaultScreen(true);
                         mHotseat.moveToDefaultScreen(true);
+                        waitForPendingTranstions = false;
                     }
 
                     closeFolder();
@@ -1576,9 +1584,20 @@ public final class Launcher extends Activity
                     // If we are already on home, then just animate back to the workspace,
                     // otherwise, just wait until onResume to set the state back to Workspace
                     if (alreadyOnHome) {
-                        showWorkspace(true);
+                        showWorkspace(true, new Runnable() {
+                            @Override
+                            public void run() {
+                                processNewPendingIntents();
+                            }
+                        });
+                        // onCompleteRunnable is not called if there is no pending animations
+                        // so we must ensure that processNewPendingIntents is called.
+                        if (!waitForPendingTranstions) {
+                            processNewPendingIntents();
+                        }
                     } else {
                         mOnResumeState = State.WORKSPACE;
+                        processNewPendingIntents();
                     }
 
                     final View v = getWindow().peekDecorView();
@@ -1595,15 +1614,43 @@ public final class Launcher extends Activity
                 }
             };
 
-            if (alreadyOnHome && !mWorkspace.hasWindowFocus()) {
-                // Delay processing of the intent to allow the status bar animation to finish
-                // first in order to avoid janky animations.
-                mWorkspace.postDelayed(processIntent, 350);
-            } else {
-                // Process the intent immediately.
-                processIntent.run();
+            boolean markAsPending = false;
+            synchronized (mNewPendingIntents) {
+                if (mOnNewIntentProcessing) {
+                    mNewPendingIntents.add(processIntent);
+                    markAsPending = true;
+                } else {
+                    mOnNewIntentProcessing = true;
+                }
             }
 
+            if (!markAsPending) {
+                if (alreadyOnHome && !mWorkspace.hasWindowFocus()) {
+                    // Delay processing of the intent to allow the status bar animation to finish
+                    // first in order to avoid janky animations.
+                    mWorkspace.postDelayed(processIntent, 350);
+                } else {
+                    // Process the intent immediately.
+                    processIntent.run();
+                }
+            }
+
+        }
+    }
+
+    private void processNewPendingIntents() {
+        Runnable newIntent = null;
+        synchronized (mNewPendingIntents) {
+            if (mNewPendingIntents.size() > 0) {
+                if (mWorkspace != null) {
+                    newIntent = mNewPendingIntents.remove(0);
+                    mWorkspace.post(newIntent);
+                } else {
+                    mOnNewIntentProcessing = false;
+                }
+            } else {
+                mOnNewIntentProcessing = false;
+            }
         }
     }
 
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