Make LayoutText::absoluteQuadsForRange to consider leading/trailing whitespaces

Source/core/layout/LayoutText.cpp

Index: Source/core/layout/LayoutText.cpp
diff --git a/Source/core/layout/LayoutText.cpp b/Source/core/layout/LayoutText.cpp
index ac36dc083ba35685a1bf8b5d22a0079e180c6ea5..834a9e33c28c4dd9dd38514da69ff856394d5eab 100644
--- a/Source/core/layout/LayoutText.cpp
+++ b/Source/core/layout/LayoutText.cpp
@@ -441,6 +441,12 @@ void LayoutText::absoluteQuadsForRange(Vector<FloatQuad>& quads, unsigned start,
     start = std::min(start, static_cast<unsigned>(INT_MAX));
     end = std::min(end, static_cast<unsigned>(INT_MAX));
 
+    const unsigned caretMinOffset = static_cast<unsigned>(this->caretMinOffset());
+    const unsigned caretMaxOffset = static_cast<unsigned>(this->caretMaxOffset());
+    // Skip leading and trailing unrendered whitespaces

[eae, 2015/08/18 16:14:45]

The comment doesn't explain how this accounts for whitespace, presumably the
caret max/min offset does that?

[yosin_UTC9, 2015/08/19 06:08:55]

Done.

+    start = std::min(std::max(caretMinOffset, start), caretMaxOffset);
+    end = std::min(std::max(caretMinOffset, end), caretMaxOffset);
+
     for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
         // Note: box->end() returns the index of the last character, not the index past it
         if (start <= box->start() && box->end() < end) {