Add a single monitor implementation of WindowSizer for Linux.

BUG=10005
Review URL: http://codereview.chromium.org/114041

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16796 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 85 insertions, 0 deletions

diff --git a/chrome/browser/window_sizer_linux.cc b/chrome/browser/window_sizer_linux.cc
new file mode 100644
index 0000000..524dfb4
--- /dev/null
+++ b/chrome/browser/window_sizer_linux.cc
@@ -0,0 +1,85 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/window_sizer.h"
+
+#include <gtk/gtk.h>
+
+#include "base/logging.h"
+#include "chrome/browser/browser.h"
+
+// How much horizontal and vertical offset there is between newly
+// opened windows. We don't care on Linux since the window manager generally
+// does a good job of window placement.
+const int WindowSizer::kWindowTilePixels = 0;
+
+// An implementation of WindowSizer::MonitorInfoProvider that gets the actual
+// monitor information from X via GDK.
+class DefaultMonitorInfoProvider : public WindowSizer::MonitorInfoProvider {
+ public:
+  DefaultMonitorInfoProvider() { }
+
+  virtual gfx::Rect GetPrimaryMonitorWorkArea() const {
+    gfx::Rect rect = GetScreenWorkArea();
+    return rect.Intersect(GetPrimaryMonitorBounds());
+  }
+
+  virtual gfx::Rect GetPrimaryMonitorBounds() const {
+    GdkScreen* screen = gdk_screen_get_default();
+    GdkRectangle rect;
+    gdk_screen_get_monitor_geometry(screen, 0, &rect);
+    return gfx::Rect(rect);
+  }
+
+  virtual gfx::Rect GetMonitorWorkAreaMatching(
+      const gfx::Rect& match_rect) const {
+    // TODO(thestig) Implement multi-monitor support.
+    return GetPrimaryMonitorWorkArea();
+  }
+
+  virtual gfx::Point GetBoundsOffsetMatching(
+      const gfx::Rect& match_rect) const {
+    // TODO(thestig) Implement multi-monitor support.
+    return GetPrimaryMonitorWorkArea().origin();
+  }
+
+  void UpdateWorkAreas() {
+    // TODO(thestig) Implement multi-monitor support.
+    work_areas_.clear();
+    work_areas_.push_back(GetPrimaryMonitorBounds());
+  }
+
+ private:
+  gfx::Rect GetScreenWorkArea() const {
+    gboolean r;
+    glong *data;
+    gint data_len;
+    r = gdk_property_get(gdk_get_default_root_window(),  // a gdk window
+                         gdk_atom_intern("_NET_WORKAREA", FALSE),  // property
+                         gdk_atom_intern("CARDINAL", FALSE),  // property type
+                         0,  // byte offset into property
+                         0xff,  // property length to retrieve
+                         false,  // delete property after retrieval?
+                         NULL,  // returned property type
+                         NULL,  // returned data format
+                         &data_len,  // returned data len
+                         reinterpret_cast<guchar**>(&data));  // returned data
+    CHECK(r);
+    CHECK(data_len >= 16);
+    gint x = data[0];
+    gint y = data[1];
+    gint width = data[0] + data[2];
+    gint height = data[1] + data[3];
+    g_free(data);
+    return gfx::Rect(x, y, width, height);
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(DefaultMonitorInfoProvider);
+};
+
+// static
+WindowSizer::MonitorInfoProvider*
+WindowSizer::CreateDefaultMonitorInfoProvider() {
+  return new DefaultMonitorInfoProvider();
+}