Implement operator<< for CFX_Rect and CFX_RectF.

This is for debugging, so gated by #ifndef NDEBUG.

Also make label the printed values to make them clear and
differentiate top>bottom and bottom>top rect systems.

Change-Id: I2d816b6b8b1be5fb5464630e771d200f2534917e
Reviewed-on: https://pdfium-review.googlesource.com/26911
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>

3 files changed, 46 insertions, 7 deletions

diff --git a/core/fxcrt/fx_coordinates.cpp b/core/fxcrt/fx_coordinates.cpp
index 69fedb5522..d25a754d7a 100644
--- a/core/fxcrt/fx_coordinates.cpp
+++ b/core/fxcrt/fx_coordinates.cpp
@@ -201,11 +201,11 @@ FX_RECT CFX_FloatRect::ToRoundedFxRect() const {
 
 #ifndef NDEBUG
 std::ostream& operator<<(std::ostream& os, const CFX_FloatRect& rect) {
-  os << "rect[" << rect.Width() << "x" << rect.Height() << " (" << rect.left
-     << ", " << rect.bottom << ")]";
+  os << "rect[w " << rect.Width() << " x h " << rect.Height() << " (left "
+     << rect.left << ", bot " << rect.bottom << ")]";
   return os;
 }
-#endif
+#endif  // NDEBUG
 
 CFX_Matrix CFX_Matrix::GetInverse() const {
   CFX_Matrix inverse;
diff --git a/core/fxcrt/fx_coordinates.h b/core/fxcrt/fx_coordinates.h
index 3d09652b13..2e8c1abca3 100644
--- a/core/fxcrt/fx_coordinates.h
+++ b/core/fxcrt/fx_coordinates.h
@@ -581,6 +581,16 @@ class CFX_RTemplate {
 using CFX_Rect = CFX_RTemplate<int32_t>;
 using CFX_RectF = CFX_RTemplate<float>;
 
+#ifndef NDEBUG
+template <class BaseType>
+std::ostream& operator<<(std::ostream& os,
+                         const CFX_RTemplate<BaseType>& rect) {
+  os << "rect[w " << rect.Width() << " x h " << rect.Height() << " (left "
+     << rect.left << ", top " << rect.top << ")]";
+  return os;
+}
+#endif  // NDEBUG
+
 // The matrix is of the form:
 // | a  b  0 |
 // | c  d  0 |
diff --git a/core/fxcrt/fx_coordinates_unittest.cpp b/core/fxcrt/fx_coordinates_unittest.cpp
index 15ee661509..7c25d0da28 100644
--- a/core/fxcrt/fx_coordinates_unittest.cpp
+++ b/core/fxcrt/fx_coordinates_unittest.cpp
@@ -197,19 +197,48 @@ TEST(CFX_FloatRect, Print) {
   std::ostringstream os;
   CFX_FloatRect rect;
   os << rect;
-  EXPECT_STREQ("rect[0x0 (0, 0)]", os.str().c_str());
+  EXPECT_STREQ("rect[w 0 x h 0 (left 0, bot 0)]", os.str().c_str());
 
   os.str("");
   rect = CFX_FloatRect(10, 20, 14, 23);
   os << rect;
-  EXPECT_STREQ("rect[4x3 (10, 20)]", os.str().c_str());
+  EXPECT_STREQ("rect[w 4 x h 3 (left 10, bot 20)]", os.str().c_str());
 
   os.str("");
   rect = CFX_FloatRect(10.5, 20.5, 14.75, 23.75);
   os << rect;
-  EXPECT_STREQ("rect[4.25x3.25 (10.5, 20.5)]", os.str().c_str());
+  EXPECT_STREQ("rect[w 4.25 x h 3.25 (left 10.5, bot 20.5)]", os.str().c_str());
 }
-#endif
+
+TEST(CFX_Rect, Print) {
+  std::ostringstream os;
+  CFX_Rect rect;
+  os << rect;
+  EXPECT_STREQ("rect[w 0 x h 0 (left 0, top 0)]", os.str().c_str());
+
+  os.str("");
+  rect = CFX_Rect(10, 20, 4, 3);
+  os << rect;
+  EXPECT_STREQ("rect[w 4 x h 3 (left 10, top 20)]", os.str().c_str());
+}
+
+TEST(CFX_RectF, Print) {
+  std::ostringstream os;
+  CFX_RectF rect;
+  os << rect;
+  EXPECT_STREQ("rect[w 0 x h 0 (left 0, top 0)]", os.str().c_str());
+
+  os.str("");
+  rect = CFX_RectF(10, 20, 4, 3);
+  os << rect;
+  EXPECT_STREQ("rect[w 4 x h 3 (left 10, top 20)]", os.str().c_str());
+
+  os.str("");
+  rect = CFX_RectF(10.5, 20.5, 4.25, 3.25);
+  os << rect;
+  EXPECT_STREQ("rect[w 4.25 x h 3.25 (left 10.5, top 20.5)]", os.str().c_str());
+}
+#endif  // NDEBUG
 
 TEST(CFX_Matrix, ReverseIdentity) {
   CFX_Matrix m;