Bug 1710533 - Apply the widget size constraints to newBounds r=mstange,gfx-reviewers

When nsView::CalcWidgetBounds() size might be applied to widget with modification. And next widget->GetClientBounds() could be different than nsView::CalcWidgetBounds() again with several reasons. But it seems OK to apply widget->ConstrainSize() in nsView::DoResetWidgetBounds(). It could remove repaint because of widget->ConstrainSize() call in the Resize().

Differential Revision: https://phabricator.services.mozilla.com/D114814

toolkit/content/tests/chrome/window_panel.xhtml

@@ -204,7 +204,7 @@ var tests = [
         is(screenRect.top, 210, testname + " screen top");
       }
       ok(screenRect.width >= 120 && screenRect.width <= 140, testname + " screen width");
-      ok(screenRect.height >= 40 && screenRect.height <= 80, testname + " screen height");
+      ok(screenRect.height >= 40 && screenRect.height <= 118, testname + " screen height");
 
       var gotMouseEvent = false;
       function mouseMoved(event)

view/nsView.cpp

@@ -332,6 +332,9 @@ void nsView::DoResetWidgetBounds(bool aMoveOnly, bool aInvalidateChangedSize) {
     return;
   }
 
+  // Apply the widget size constraints to newBounds.
+  widget->ConstrainSize(&newBounds.width, &newBounds.height);
+
   bool changedPos = curBounds.TopLeft() != newBounds.TopLeft();
   bool changedSize = curBounds.Size() != newBounds.Size();
 

widget/nsBaseWidget.h

@@ -578,7 +578,7 @@ class nsBaseWidget : public nsIWidget, public nsSupportsWeakReference {
    * @param aWidth width to constrain
    * @param aHeight height to constrain
    */
-  void ConstrainSize(int32_t* aWidth, int32_t* aHeight) {
+  void ConstrainSize(int32_t* aWidth, int32_t* aHeight) override {
     SizeConstraints c = GetSizeConstraints();
     *aWidth = std::max(c.mMinSize.width, std::min(c.mMaxSize.width, *aWidth));
     *aHeight =

widget/nsIWidget.h

@@ -2079,6 +2079,14 @@ class nsIWidget : public nsISupports {
    */
   virtual const SizeConstraints GetSizeConstraints() = 0;
 
+  /**
+   * Apply the current size constraints to the given size.
+   *
+   * @param aWidth width to constrain
+   * @param aHeight height to constrain
+   */
+  virtual void ConstrainSize(int32_t* aWidth, int32_t* aHeight) = 0;
+
   /**
    * If this is owned by a BrowserChild, return that.  Otherwise return
    * null.