Place ellipsis correctly inside inline-blocks

third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  *               All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 2404 matching lines @@
       // need to see if the line can be truncated.  In order for truncation to
       // be possible, the line must have sufficient space to accommodate our
       // truncation string, and no replaced elements (images, tables) can
       // overlap the ellipsis space.
 
       LayoutUnit width(indentText == IndentText ? firstLineEllipsisWidth
                                                 : ellipsisWidth);
       LayoutUnit blockEdge = ltr ? blockRightEdge : blockLeftEdge;
       if (curr->lineCanAccommodateEllipsis(ltr, blockEdge, lineBoxEdge,
                                            width)) {
-        LayoutUnit totalLogicalWidth = curr->placeEllipsis(
-            selectedEllipsisStr, ltr, blockLeftEdge, blockRightEdge, width);
+        LayoutUnit totalLogicalWidth =
+            curr->placeEllipsis(selectedEllipsisStr, ltr, blockLeftEdge,
+                                blockRightEdge, width, LayoutUnit(), false);
         LayoutUnit logicalLeft;  // We are only interested in the delta from the
-                                 // base position.
+        // base position.
         LayoutUnit availableLogicalWidth = blockRightEdge - blockLeftEdge;
         updateLogicalWidthForAlignment(textAlign, curr, 0, logicalLeft,
                                        totalLogicalWidth, availableLogicalWidth,
                                        0);
         if (ltr)
           curr->moveInInlineDirection(logicalLeft);
         else
           curr->moveInInlineDirection(
               logicalLeft - (availableLogicalWidth - totalLogicalWidth));
+      } else {
+        tryPlacingEllipsisOnAtomicInlines(curr, blockRightEdge, blockLeftEdge,
+                                          width, selectedEllipsisStr);
       }
     }
     indentText = DoNotIndentText;
   }
 }
 
+void LayoutBlockFlow::tryPlacingEllipsisOnAtomicInlines(
+    RootInlineBox* root,
+    LayoutUnit blockRightEdge,
+    LayoutUnit blockLeftEdge,
+    LayoutUnit ellipsisWidth,
+    const AtomicString& selectedEllipsisStr) {
+  bool ltr = style()->isLeftToRightDirection();
+  LayoutUnit logicalLeftOffset = blockLeftEdge;
+
+  // Each atomic inline block (e.g. a <span>) inside a blockflow is managed by
+  // an
+  // InlineBox that allows us to access the lineboxes that live inside the
+  // atomic
+  // inline block.
+  bool foundBox = false;
+  for (InlineBox* box = ltr ? root->firstChild() : root->lastChild(); box;
+       box = ltr ? box->nextOnLine() : box->prevOnLine()) {
+    if (!box->getLineLayoutItem().isAtomicInlineLevel() ||
+        !box->getLineLayoutItem().isLayoutBlockFlow())
+      continue;
+
+    RootInlineBox* firstRootBox =
+        LineLayoutBlockFlow(box->getLineLayoutItem()).firstRootBox();
+    if (!firstRootBox)
+      continue;
+
+    bool placedEllipsis = false;
+    // Move the right edge of the block in so that we can test it against the
+    // width of the root line boxes.  We don't resize or move the linebox to
+    // respect text-align because it is the final one of a sequence on the line.
+    if (ltr) {
+      for (RootInlineBox* curr = firstRootBox; curr;
+           curr = curr->nextRootBox()) {
+        LayoutUnit currLogicalLeft = logicalLeftOffset + curr->logicalLeft();
+        LayoutUnit ellipsisEdge =
+            currLogicalLeft + curr->logicalWidth() + ellipsisWidth;
+        if (ellipsisEdge <= blockRightEdge)
+          continue;
+        curr->placeEllipsis(selectedEllipsisStr, ltr, blockLeftEdge,
+                            blockRightEdge, ellipsisWidth, logicalLeftOffset,
+                            foundBox);
+        placedEllipsis = true;
+      }
+    } else {
+      LayoutUnit maxRootBoxWidth;
+      for (RootInlineBox* curr = firstRootBox; curr;
+           curr = curr->nextRootBox()) {
+        LayoutUnit ellipsisEdge =
+            box->logicalLeft() + curr->logicalLeft() - ellipsisWidth;
+        if (ellipsisEdge >= blockLeftEdge)
+          continue;
+        // Root boxes can vary in width so move our offset out to allow
+        // comparison with the right hand edge of the block.
+        LayoutUnit logicalLeftOffset = box->logicalLeft();
+        maxRootBoxWidth =
+            std::max<LayoutUnit>(curr->logicalWidth(), maxRootBoxWidth);
+        if (logicalLeftOffset < 0)
+          logicalLeftOffset += maxRootBoxWidth - curr->logicalWidth();
+        curr->placeEllipsis(selectedEllipsisStr, ltr, blockLeftEdge,
+                            blockRightEdge, ellipsisWidth,
+                            LayoutUnit(logicalLeftOffset.ceil()), foundBox);
+        placedEllipsis = true;
+      }
+    }
+    foundBox |= placedEllipsis;
+    logicalLeftOffset += box->logicalWidth();
+  }
+}
+
 void LayoutBlockFlow::markLinesDirtyInBlockRange(LayoutUnit logicalTop,
                                                  LayoutUnit logicalBottom,
                                                  RootInlineBox* highest) {
   if (logicalTop >= logicalBottom)
     return;
 
   RootInlineBox* lowestDirtyLine = lastRootBox();
   RootInlineBox* afterLowest = lowestDirtyLine;
   while (lowestDirtyLine &&
          lowestDirtyLine->lineBottomWithLeading() >= logicalBottom &&
@@ skipping 58 matching lines @@
 
 bool LayoutBlockFlow::paintedOutputOfObjectHasNoEffectRegardlessOfSize() const {
   // LayoutBlockFlow is in charge of paint invalidation of the first line.
   if (firstLineBox())
     return false;
 
   return LayoutBlock::paintedOutputOfObjectHasNoEffectRegardlessOfSize();
 }
 
 }  // namespace blink