Bug 1370034 - Add -moz-window-opacity property, style system parts (excluding stylo). r=dbaron

MozReview-Commit-ID: J2SPMzh0I9C

--HG--
extra : rebase_source : b8c5f267f99fb7bab560af82a386cd3f3a9af5f3

devtools/shared/css/generated/properties-db.js

@@ -1501,6 +1501,20 @@ exports.CSS_PROPERTIES = {
       "unset"
     ]
   },
+  "-moz-window-opacity": {
+    "isInherited": false,
+    "subproperties": [
+      "-moz-window-opacity"
+    ],
+    "supports": [
+      7
+    ],
+    "values": [
+      "inherit",
+      "initial",
+      "unset"
+    ]
+  },
   "-webkit-align-content": {
     "isInherited": false,
     "subproperties": [
@@ -3150,6 +3164,7 @@ exports.CSS_PROPERTIES = {
       "will-change",
       "-moz-window-dragging",
       "-moz-window-shadow",
+      "-moz-window-opacity",
       "word-break",
       "word-spacing",
       "overflow-wrap",

layout/base/RestyleManager.cpp

@@ -459,6 +459,7 @@ RestyleManager::ChangeHintToString(nsChangeHint aHint)
     "ReflowChangesSizeOrPosition", "UpdateComputedBSize",
     "UpdateUsesOpacity", "UpdateBackgroundPosition",
     "AddOrRemoveTransform", "CSSOverflowChange",
+    "UpdateWidgetProperties"
   };
   static_assert(nsChangeHint_AllHints == (1 << ArrayLength(names)) - 1,
                 "Name list doesn't match change hints.");
@@ -1713,6 +1714,9 @@ RestyleManager::ProcessRestyledFrames(nsStyleChangeList& aChangeList)
         presContext->PresShell()->SynthesizeMouseMove(false);
         didUpdateCursor = true;
       }
+      if (hint & nsChangeHint_UpdateWidgetProperties) {
+        frame->UpdateWidgetProperties();
+      }
     }
   }
 

layout/base/nsChangeHint.h

@@ -232,6 +232,12 @@ enum nsChangeHint : uint32_t {
    */
   nsChangeHint_CSSOverflowChange = 1 << 28,
 
+  /**
+   * Indicates that nsIFrame::UpdateWidgetProperties needs to be called.
+   * This is used for -moz-window-* properties.
+   */
+  nsChangeHint_UpdateWidgetProperties = 1 << 29,
+
   // IMPORTANT NOTE: When adding a new hint, you will need to add it to
   // one of:
   //
@@ -247,7 +253,7 @@ enum nsChangeHint : uint32_t {
   /**
    * Dummy hint value for all hints. It exists for compile time check.
    */
-  nsChangeHint_AllHints = (1 << 29) - 1,
+  nsChangeHint_AllHints = (1 << 30) - 1,
 };
 
 // Redefine these operators to return nothing. This will catch any use
@@ -349,7 +355,8 @@ inline nsChangeHint operator^=(nsChangeHint& aLeft, nsChangeHint aRight)
   nsChangeHint_UpdatePostTransformOverflow |               \
   nsChangeHint_UpdateTransformLayer |                      \
   nsChangeHint_UpdateUsesOpacity |                         \
-  nsChangeHint_AddOrRemoveTransform                        \
+  nsChangeHint_AddOrRemoveTransform |                      \
+  nsChangeHint_UpdateWidgetProperties                      \
 )
 
 // The change hints that are sometimes considered to be handled for descendants.

layout/generic/nsIFrame.h

@@ -3934,6 +3934,8 @@ public:
    */
   bool IsScrolledOutOfView();
 
+  virtual void UpdateWidgetProperties() {}
+
   /**
    * @return true iff this frame has one or more associated image requests.
    * @see mozilla::css::ImageLoader.

layout/style/nsCSSPropList.h

@@ -4494,6 +4494,16 @@ CSS_PROP_UIRESET(
     kWindowShadowKTable,
     CSS_PROP_NO_OFFSET,
     eStyleAnimType_None)
+CSS_PROP_UIRESET(
+    -moz-window-opacity,
+    _moz_window_opacity,
+    CSS_PROP_DOMPROP_PREFIXED(WindowOpacity),
+    CSS_PROPERTY_INTERNAL | CSS_PROPERTY_PARSE_VALUE,
+    "",
+    VARIANT_HN,
+    nullptr,
+    offsetof(nsStyleUIReset, mWindowOpacity),
+    eStyleAnimType_float)
 #endif // CSS_PROP_LIST_EXCLUDE_INTERNAL
 CSS_PROP_TEXT(
     word-break,

layout/style/nsComputedDOMStyle.cpp

@@ -4226,6 +4226,14 @@ nsComputedDOMStyle::DoGetWindowShadow()
   return val.forget();
 }
 
+already_AddRefed<CSSValue>
+nsComputedDOMStyle::DoGetWindowOpacity()
+{
+  RefPtr<nsROCSSPrimitiveValue> val = new nsROCSSPrimitiveValue;
+  val->SetNumber(StyleUIReset()->mWindowOpacity);
+  return val.forget();
+}
+
 already_AddRefed<CSSValue>
 nsComputedDOMStyle::DoGetWordBreak()
 {

layout/style/nsComputedDOMStyle.h

@@ -528,6 +528,7 @@ private:
   already_AddRefed<CSSValue> DoGetUserModify();
   already_AddRefed<CSSValue> DoGetUserSelect();
   already_AddRefed<CSSValue> DoGetWindowDragging();
+  already_AddRefed<CSSValue> DoGetWindowOpacity();
 
   /* Column properties */
   already_AddRefed<CSSValue> DoGetColumnCount();

layout/style/nsComputedDOMStylePropertyList.h

@@ -305,6 +305,7 @@ COMPUTED_STYLE_PROP(_moz_user_modify,              UserModify)
 COMPUTED_STYLE_PROP(_moz_user_select,              UserSelect)
 COMPUTED_STYLE_PROP(_moz_window_dragging,          WindowDragging)
 COMPUTED_STYLE_PROP(_moz_window_shadow,            WindowShadow)
+COMPUTED_STYLE_PROP(_moz_window_opacity,           WindowOpacity)
 
 /* ********************************** *\
  * Implementations of -webkit- styles *

layout/style/nsRuleNode.cpp

@@ -5275,6 +5275,12 @@ nsRuleNode::ComputeUIResetData(void* aStartStruct,
            parentUI->mWindowShadow,
            NS_STYLE_WINDOW_SHADOW_DEFAULT);
 
+  // -moz-window-opacity: factor, inherit, initial
+  SetFactor(*aRuleData->ValueForWindowOpacity(),
+            ui->mWindowOpacity, conditions,
+            parentUI->mWindowOpacity, 1.0f,
+            SETFCT_OPACITY | SETFCT_UNSET_INITIAL);
+
   COMPUTE_END_RESET(UIReset, ui)
 }
 

layout/style/nsStyleStruct.cpp

@@ -4326,6 +4326,7 @@ nsStyleUIReset::nsStyleUIReset(const nsPresContext* aContext)
   , mIMEMode(NS_STYLE_IME_MODE_AUTO)
   , mWindowDragging(StyleWindowDragging::Default)
   , mWindowShadow(NS_STYLE_WINDOW_SHADOW_DEFAULT)
+  , mWindowOpacity(1.0)
 {
   MOZ_COUNT_CTOR(nsStyleUIReset);
 }
@@ -4336,6 +4337,7 @@ nsStyleUIReset::nsStyleUIReset(const nsStyleUIReset& aSource)
   , mIMEMode(aSource.mIMEMode)
   , mWindowDragging(aSource.mWindowDragging)
   , mWindowShadow(aSource.mWindowShadow)
+  , mWindowOpacity(aSource.mWindowOpacity)
 {
   MOZ_COUNT_CTOR(nsStyleUIReset);
 }
@@ -4348,29 +4350,35 @@ nsStyleUIReset::~nsStyleUIReset()
 nsChangeHint
 nsStyleUIReset::CalcDifference(const nsStyleUIReset& aNewData) const
 {
-  // ignore mIMEMode
+  nsChangeHint hint = nsChangeHint(0);
+
   if (mForceBrokenImageIcon != aNewData.mForceBrokenImageIcon) {
-    return nsChangeHint_ReconstructFrame;
+    hint |= nsChangeHint_ReconstructFrame;
   }
   if (mWindowShadow != aNewData.mWindowShadow) {
     // We really need just an nsChangeHint_SyncFrameView, except
     // on an ancestor of the frame, so we get that by doing a
     // reflow.
-    return NS_STYLE_HINT_REFLOW;
+    hint |= NS_STYLE_HINT_REFLOW;
   }
   if (mUserSelect != aNewData.mUserSelect) {
-    return NS_STYLE_HINT_VISUAL;
+    hint |= NS_STYLE_HINT_VISUAL;
   }
 
   if (mWindowDragging != aNewData.mWindowDragging) {
-    return nsChangeHint_SchedulePaint;
+    hint |= nsChangeHint_SchedulePaint;
   }
 
-  if (mIMEMode != aNewData.mIMEMode) {
-    return nsChangeHint_NeutralChange;
+  if (mWindowOpacity != aNewData.mWindowOpacity) {
+    hint |= nsChangeHint_UpdateWidgetProperties;
   }
 
-  return nsChangeHint(0);
+  if (!hint &&
+      mIMEMode != aNewData.mIMEMode) {
+    hint |= nsChangeHint_NeutralChange;
+  }
+
+  return hint;
 }
 
 //-----------------------

layout/style/nsStyleStruct.h

@@ -3228,6 +3228,7 @@ struct MOZ_NEEDS_MEMMOVABLE_MEMBERS nsStyleUIReset
   uint8_t                      mIMEMode;        // [reset]
   mozilla::StyleWindowDragging mWindowDragging; // [reset]
   uint8_t                      mWindowShadow;   // [reset]
+  float                        mWindowOpacity;  // [reset]
 };
 
 struct nsCursorImage

layout/style/test/ListCSSProperties.cpp

@@ -115,6 +115,7 @@ const char *gInaccessibleProperties[] = {
     "-moz-math-display", // parsed by UA sheets only
     "-moz-top-layer", // parsed by UA sheets only
     "-moz-min-font-size-ratio", // parsed by UA sheets only
+    "-moz-window-opacity", // chrome-only internal properties
     "-moz-window-shadow" // chrome-only internal properties
 };
 

layout/style/test/property_database.js

@@ -7905,6 +7905,15 @@ if (false) {
     invalid_values: []
   };
 
+  gCSSProperties["-moz-window-opacity"] = {
+    // domProp: "MozWindowOpacity",
+    inherited: false,
+    type: CSS_TYPE_LONGHAND,
+    initial_values: [ "1", "17", "397.376", "3e1", "3e+1", "3e0", "3e+0", "3e-0" ],
+    other_values: [ "0", "0.4", "0.0000", "-3", "3e-1" ],
+    invalid_values: [ "0px", "1px", "20%", "default", "auto" ]
+  };
+
   gCSSProperties["-moz-context-properties"] = {
     //domProp: "MozContextProperties",
     inherited: true,