Make TextIterator not stop at IMG element for finding text separating inline image

Source/core/editing/TextIterator.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 248 matching lines @@
     , m_emitsCharactersBetweenAllVisiblePositions(behavior & TextIteratorEmitsCharactersBetweenAllVisiblePositions)
     , m_entersTextControls(behavior & TextIteratorEntersTextControls)
     , m_emitsOriginalText(behavior & TextIteratorEmitsOriginalText)
     , m_handledFirstLetter(false)
     , m_ignoresStyleVisibility(behavior & TextIteratorIgnoresStyleVisibility)
     , m_stopsOnFormControls(behavior & TextIteratorStopsOnFormControls)
     , m_shouldStop(false)
     , m_emitsImageAltText(behavior & TextIteratorEmitsImageAltText)
     , m_entersAuthorShadowRoots(behavior & TextIteratorEntersAuthorShadowRoots)
     , m_emitsObjectReplacementCharacter(behavior & TextIteratorEmitsObjectReplacementCharacter)
+    , m_breakAtZeroLengthBoundary(behavior & TextIteratorBreakAtZeroLengthBoundary)
 {
     if (range)
         initialize(range->startPosition(), range->endPosition());
 }
 
 TextIterator::TextIterator(const Position& start, const Position& end, TextIteratorBehaviorFlags behavior)
     : m_startContainer(nullptr)
     , m_startOffset(0)
     , m_endContainer(nullptr)
     , m_endOffset(0)
@@ skipping 11 matching lines @@
     , m_emitsCharactersBetweenAllVisiblePositions(behavior & TextIteratorEmitsCharactersBetweenAllVisiblePositions)
     , m_entersTextControls(behavior & TextIteratorEntersTextControls)
     , m_emitsOriginalText(behavior & TextIteratorEmitsOriginalText)
     , m_handledFirstLetter(false)
     , m_ignoresStyleVisibility(behavior & TextIteratorIgnoresStyleVisibility)
     , m_stopsOnFormControls(behavior & TextIteratorStopsOnFormControls)
     , m_shouldStop(false)
     , m_emitsImageAltText(behavior & TextIteratorEmitsImageAltText)
     , m_entersAuthorShadowRoots(behavior & TextIteratorEntersAuthorShadowRoots)
     , m_emitsObjectReplacementCharacter(behavior & TextIteratorEmitsObjectReplacementCharacter)
+    , m_breakAtZeroLengthBoundary(behavior & TextIteratorBreakAtZeroLengthBoundary)
 {
     initialize(start, end);
 }
 
 void TextIterator::initialize(const Position& start, const Position& end)
 {
     ASSERT(comparePositions(start, end) <= 0);
 
     // Get and validate |start| and |end|.
     Node* startContainer = start.containerNode();
@@ skipping 1429 matching lines @@
     }
 
     // exhaust the current m_textIterator run
     count -= remaining;
     m_offset += remaining;
 
     // move to a subsequent m_textIterator run
     for (m_textIterator.advance(); !atEnd(); m_textIterator.advance()) {
         int runLength = m_textIterator.length();
         if (!runLength) {
-            m_atBreak = true;
+            m_atBreak = m_textIterator.breakAtZeroLengthBoundary();

[yosin_UTC9, 2014/10/03 07:53:56]

Please make default value of |m_breakAtZeroLengthBoundary| to true to keep
current behavior. We need to change call sites in Find-In-Page to pass
NotBreakAtZeroLengthBoundary flag to TextIterator.

         } else {
             // see whether this is m_textIterator to use
             if (count < runLength) {
                 m_runOffset = count;
                 m_offset += count;
                 return;
             }
 
             // exhaust this m_textIterator run
             count -= runLength;
@@ skipping 659 matching lines @@
             resultEnd = collapseTo;
             return;
         }
     }
 
     CharacterIterator computeRangeIterator(inputStart, inputEnd, iteratorFlagsForFindPlainText);
     calculateCharacterSubrange(computeRangeIterator, matchStart, matchLength, resultStart, resultEnd);
 }
 
 }