1 files changed, 62 insertions, 0 deletions
diff --git a/gfx/src/nsRect.cpp b/gfx/src/nsRect.cpp
new file mode 100644
index 000000000..c17c249b2
--- /dev/null
+++ b/gfx/src/nsRect.cpp
@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsRect.h"
+#include "mozilla/gfx/Types.h"          // for NS_SIDE_BOTTOM, etc
+#include "mozilla/CheckedInt.h"         // for CheckedInt
+#include "nsDeviceContext.h"            // for nsDeviceContext
+#include "nsString.h"               // for nsAutoString, etc
+#include "nsMargin.h"                   // for nsMargin
+
+static_assert((int(NS_SIDE_TOP) == 0) &&
+              (int(NS_SIDE_RIGHT) == 1) &&
+              (int(NS_SIDE_BOTTOM) == 2) &&
+              (int(NS_SIDE_LEFT) == 3),
+              "The mozilla::css::Side sequence must match the nsMargin nscoord sequence");
+
+const mozilla::gfx::IntRect& GetMaxSizedIntRect() {
+  static const mozilla::gfx::IntRect r(0, 0, INT32_MAX, INT32_MAX);
+  return r;
+}
+
+
+bool nsRect::Overflows() const {
+#ifdef NS_COORD_IS_FLOAT
+  return false;
+#else
+  mozilla::CheckedInt<int32_t> xMost = this->x;
+  xMost += this->width;
+  mozilla::CheckedInt<int32_t> yMost = this->y;
+  yMost += this->height;
+  return !xMost.isValid() || !yMost.isValid();
+#endif
+}
+
+#ifdef DEBUG
+// Diagnostics
+
+FILE* operator<<(FILE* out, const nsRect& rect)
+{
+  nsAutoString tmp;
+
+  // Output the coordinates in fractional pixels so they're easier to read
+  tmp.Append('{');
+  tmp.AppendFloat(NSAppUnitsToFloatPixels(rect.x,
+                       nsDeviceContext::AppUnitsPerCSSPixel()));
+  tmp.AppendLiteral(", ");
+  tmp.AppendFloat(NSAppUnitsToFloatPixels(rect.y,
+                       nsDeviceContext::AppUnitsPerCSSPixel()));
+  tmp.AppendLiteral(", ");
+  tmp.AppendFloat(NSAppUnitsToFloatPixels(rect.width,
+                       nsDeviceContext::AppUnitsPerCSSPixel()));
+  tmp.AppendLiteral(", ");
+  tmp.AppendFloat(NSAppUnitsToFloatPixels(rect.height,
+                       nsDeviceContext::AppUnitsPerCSSPixel()));
+  tmp.Append('}');
+  fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
+  return out;
+}
+
+#endif // DEBUG