Add base to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 217 insertions, 0 deletions

diff --git a/base/gfx/rect.cc b/base/gfx/rect.cc
new file mode 100644
index 0000000..dda7e67
--- /dev/null
+++ b/base/gfx/rect.cc
@@ -0,0 +1,217 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "base/gfx/rect.h"
+
+#include <windows.h>
+
+#include "base/logging.h"
+
+namespace {
+
+void AdjustAlongAxis(int dst_origin, int dst_size, int* origin, int* size) {
+  if (*origin < dst_origin) {
+    *origin = dst_origin;
+    *size = std::min(dst_size, *size);
+  } else {
+    *size = std::min(dst_size, *size);
+    *origin = std::min(dst_origin + dst_size, *origin + *size) - *size;
+  }
+}
+
+} // namespace
+
+namespace gfx {
+
+Rect::Rect() {
+}
+
+Rect::Rect(int width, int height) {
+  set_width(width);
+  set_height(height);
+}
+
+Rect::Rect(int x, int y, int width, int height)
+    : origin_(x, y) {
+  set_width(width);
+  set_height(height);
+}
+
+Rect::Rect(const RECT& r)
+    : origin_(r.left, r.top) {
+  set_width(r.right - r.left);
+  set_height(r.bottom - r.top);
+}
+
+Rect& Rect::operator=(const RECT& r) {
+  origin_.SetPoint(r.left, r.top);
+  set_width(r.right - r.left);
+  set_height(r.bottom - r.top);
+  return *this;
+}
+
+void Rect::set_width(int width) {
+  if (width < 0) {
+    NOTREACHED();
+    width = 0;
+  }
+
+  size_.set_width(width);
+}
+void Rect::set_height(int height) {
+  if (height < 0) {
+    NOTREACHED();
+    height = 0;
+  }
+
+  size_.set_height(height);
+}
+
+void Rect::SetRect(int x, int y, int width, int height) {
+  origin_.SetPoint(x, y);
+  set_width(width);
+  set_height(height);
+}
+
+void Rect::Inset(int horizontal, int vertical) {
+  set_x(x() + horizontal);
+  set_y(y() + vertical);
+  set_width(std::max(width() - (horizontal * 2), 0));
+  set_height(std::max(height() - (vertical * 2), 0));
+}
+
+void Rect::Offset(int horizontal, int vertical) {
+  set_x(x() + horizontal);
+  set_y(y() + vertical);
+}
+
+bool Rect::IsEmpty() const {
+  return width() == 0 || height() == 0;
+}
+
+bool Rect::operator==(const Rect& other) const {
+  return origin_ == other.origin_ && size_ == other.size_;
+}
+
+RECT Rect::ToRECT() const {
+  RECT r;
+  r.left = x();
+  r.right = right();
+  r.top = y();
+  r.bottom = bottom();
+  return r;
+}
+
+bool Rect::Contains(int point_x, int point_y) const {
+  return (point_x >= x()) && (point_x < right()) &&
+         (point_y >= y()) && (point_y < bottom());
+}
+
+bool Rect::Contains(const Rect& rect) const {
+  return (rect.x() >= x() && rect.right() <= right() &&
+          rect.y() >= y() && rect.bottom() <= bottom());
+}
+
+bool Rect::Intersects(const Rect& rect) const {
+  return !(rect.x() >= right() || rect.right() <= x() ||
+           rect.y() >= bottom() || rect.bottom() <= y());
+}
+
+Rect Rect::Intersect(const Rect& rect) const {
+  int rx = std::max(x(), rect.x());
+  int ry = std::max(y(), rect.y());
+  int rr = std::min(right(), rect.right());
+  int rb = std::min(bottom(), rect.bottom());
+
+  if (rx >= rr || ry >= rb)
+    rx = ry = rr = rb = 0;  // non-intersecting
+
+  return Rect(rx, ry, rr - rx, rb - ry);
+}
+
+Rect Rect::Union(const Rect& rect) const {
+  // special case empty rects...
+  if (IsEmpty())
+    return rect;
+  if (rect.IsEmpty())
+    return *this;
+
+  int rx = std::min(x(), rect.x());
+  int ry = std::min(y(), rect.y());
+  int rr = std::max(right(), rect.right());
+  int rb = std::max(bottom(), rect.bottom());
+
+  return Rect(rx, ry, rr - rx, rb - ry);
+}
+
+Rect Rect::Subtract(const Rect& rect) const {
+  // boundary cases:
+  if (!Intersects(rect))
+    return *this;
+  if (rect.Contains(*this))
+    return Rect();
+
+  int rx = x();
+  int ry = y();
+  int rr = right();
+  int rb = bottom();
+
+  if (rect.y() <= y() && rect.bottom() >= bottom()) {
+    // complete intersection in the y-direction
+    if (rect.x() <= x()) {
+      rx = rect.right();
+    } else {
+      rr = rect.x();
+    }
+  } else if (rect.x() <= x() && rect.right() >= right()) {
+    // complete intersection in the x-direction
+    if (rect.y() <= y()) {
+      ry = rect.bottom();
+    } else {
+      rb = rect.y();
+    }
+  }
+  return Rect(rx, ry, rr - rx, rb - ry);
+}
+
+Rect Rect::AdjustToFit(const Rect& rect) const {
+  int new_x = x();
+  int new_y = y();
+  int new_width = width();
+  int new_height = height();
+  AdjustAlongAxis(rect.x(), rect.width(), &new_x, &new_width);
+  AdjustAlongAxis(rect.y(), rect.height(), &new_y, &new_height);
+  return Rect(new_x, new_y, new_width, new_height);
+}
+
+Point Rect::CenterPoint() const {
+  return Point(x() + (width() + 1) / 2, y() + (height() + 1) / 2);
+}
+
+}  // namespace gfx