Fixup a bug about SVG text selection.

Source/platform/geometry/FloatRect.cpp

Index: Source/platform/geometry/FloatRect.cpp
diff --git a/Source/platform/geometry/FloatRect.cpp b/Source/platform/geometry/FloatRect.cpp
index 98cdab70cce1fdb6c051122c630e87f386aaa4dc..37bcb8efc06c9607de52f560805ee7ec9ea8d3e6 100644
--- a/Source/platform/geometry/FloatRect.cpp
+++ b/Source/platform/geometry/FloatRect.cpp
@@ -162,6 +162,14 @@ void FloatRect::scale(float sx, float sy)
     m_size.setHeight(height() * sy);
 }
 
+float FloatRect::distanceFromPoint(const FloatPoint& p)

[fs, 2015/04/27 13:02:17]

squaredDistance...

This is probably a bit to specialized ATM, so we could as well have this as a
static helper function in LayoutSVGInlineText.cpp.

+{
+    float closestX, closestY;

[fs, 2015/04/27 13:02:17]

If you made this a FloatPoint, you wouldn't need to open-code as much (could use
operator- and diagonalLengthSquared.)

+    closestX = std::max(std::min(p.x(), maxX()), x());
+    closestY = std::max(std::min(p.y(), maxY()), y());
+    return powf(p.x() - closestX, 2) + powf(p.y() - closestY, 2);
+}
+
 FloatRect unionRect(const Vector<FloatRect>& rects)
 {
     FloatRect result;