Bug 634085 - Stacks do not show last-visited tab in the front for children after number 6 [r=ian, a=beltzner]

browser/base/content/tabview/groupitems.js

@@ -1316,7 +1316,6 @@ GroupItem.prototype = Utils.extend(new Item(), new Subscribable(), {
         {hideTitle:true});
      }
 
-
     // x is the left margin that the stack will have, within the content area (bb)
     // y is the vertical margin
     var x = (bb.width - size.x) / 2;
@@ -1325,14 +1324,19 @@ GroupItem.prototype = Utils.extend(new Item(), new Subscribable(), {
 
     var self = this;
     var children = [];
+
+    // ensure this.topChild is the first item in childrenToArrange
+    let topChildPos = childrenToArrange.indexOf(this.topChild);
+    if (topChildPos > 0) {
+      childrenToArrange.splice(topChildPos, 1);
+      childrenToArrange.unshift(this.topChild);
+    }
+
     childrenToArrange.forEach(function GroupItem__stackArrange_order(child) {
       // Children are still considered stacked even if they're hidden later.
       child.addClass("stacked");
       child.isStacked = true;
       if (numInPile-- > 0) {
-        if (child == self.topChild)
-          children.unshift(child);
-        else
         children.push(child);
       } else {
         child.setHidden(true);

browser/base/content/test/tabview/Makefile.in

@@ -114,6 +114,7 @@ _BROWSER_FILES = \
                  browser_tabview_bug630157.js \
                  browser_tabview_bug631662.js \
                  browser_tabview_bug634077.js \
+                 browser_tabview_bug634085.js \
                  browser_tabview_bug634158.js \
                  browser_tabview_dragdrop.js \
                  browser_tabview_exit_button.js \

browser/base/content/test/tabview/browser_tabview_bug588265.js

@@ -54,7 +54,7 @@ function setup() {
     is(groupItemOne.getChildren().length, 2, "Group one has 2 tab items");
 
     // create group two with a blank tab.
-    let groupItemTwo = createEmptyGroupItem(contentWindow, 250, 250, 40, true);
+    let groupItemTwo = createEmptyGroupItem(contentWindow, 250, 250, 40);
     createNewTabItemInGroupItem(groupItemTwo, contentWindow, function() {
       // start the first test.
       testGroups(groupItemOne, groupItemTwo, contentWindow);

browser/base/content/test/tabview/browser_tabview_bug634085.js

@@ -0,0 +1,49 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  let numChildren = 7;
+
+  let assertTopOfStack = function (tabItem) {
+    ok(!tabItem.getHidden(), "tabItem is visible");
+    is(tabItem.zIndex, tabItem.parent.getZ() + numChildren + 1, "zIndex");
+  }
+
+  let testTopOfStack = function (tabItem, callback) {
+    hideTabView(function () {
+      gBrowser.selectedTab = tabItem.tab;
+
+      showTabView(function () {
+        assertTopOfStack(tabItem);
+        callback();
+      });
+    });
+  }
+
+  let finishTest = function () {
+    registerCleanupFunction(function () {
+      is(1, gBrowser.tabs.length, "there is one tab, only");
+      ok(!TabView.isVisible(), "tabview is not visible");
+    });
+
+    finish();
+  }
+
+  waitForExplicitFinish();
+
+  showTabView(function () {
+    let groupItem = createGroupItemWithBlankTabs(window, 150, 150, 10, numChildren);
+
+    registerCleanupFunction(function () {
+      closeGroupItem(groupItem, function () TabView.hide());
+    });
+
+    testTopOfStack(groupItem.getChild(1), function () {
+      testTopOfStack(groupItem.getChild(6), function () {
+        closeGroupItem(groupItem, function () {
+          hideTabView(finishTest);
+        });
+      });
+    });
+  });
+}

browser/base/content/test/tabview/browser_tabview_group.js

@@ -65,7 +65,7 @@ function testEmptyGroupItem(contentWindow) {
   let groupItemCount = contentWindow.GroupItems.groupItems.length;
   
   // create empty group item
-  let emptyGroupItem = createEmptyGroupItem(contentWindow, 300, 300, 100, true);
+  let emptyGroupItem = createEmptyGroupItem(contentWindow, 300, 300, 100);
   ok(emptyGroupItem.isEmpty(), "This group is empty");
 
   is(contentWindow.GroupItems.groupItems.length, ++groupItemCount,
@@ -89,7 +89,7 @@ function testEmptyGroupItem(contentWindow) {
 }
 
 function testGroupItemWithTabItem(contentWindow) {
-  let groupItem = createEmptyGroupItem(contentWindow, 300, 300, 200, true);
+  let groupItem = createEmptyGroupItem(contentWindow, 300, 300, 200);
   let tabItemCount = 0;
 
   let onTabViewHidden = function() {

browser/base/content/test/tabview/browser_tabview_layout.js

@@ -73,7 +73,7 @@ function testEmptyGroupItem(contentWindow) {
   //
     
   // create empty group item
-  let emptyGroupItem = createEmptyGroupItem(contentWindow, 253, 335, 100, true);
+  let emptyGroupItem = createEmptyGroupItem(contentWindow, 253, 335, 100);
   ok(emptyGroupItem.isEmpty(), "This group is empty");
 
   is(contentWindow.GroupItems.groupItems.length, ++groupItemCount,

browser/base/content/test/tabview/head.js

@@ -37,7 +37,7 @@
  *
  * ***** END LICENSE BLOCK ***** */
 
-function createEmptyGroupItem(contentWindow, width, height, padding, noAnimation) {
+function createEmptyGroupItem(contentWindow, width, height, padding, animate) {
   let pageBounds = contentWindow.Items.getPageBounds();
   pageBounds.inset(padding, padding);
 
@@ -45,9 +45,8 @@ function createEmptyGroupItem(contentWindow, width, height, padding, noAnimation
   box.width = width;
   box.height = height;
 
-  let immediately = noAnimation ? true: false;
   let emptyGroupItem =
-    new contentWindow.GroupItem([], { bounds: box, immediately: immediately });
+    new contentWindow.GroupItem([], { bounds: box, immediately: !animate });
 
   return emptyGroupItem;
 }