Re-implement overscan & Implement Display Rotation

ash/display/display_info.cc

 // Copyright (c) 2013 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 <stdio.h>
+#include <string>
+#include <vector>
 
 #include "ash/display/display_info.h"
 #include "base/logging.h"
+#include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "ui/gfx/display.h"
 
 #if defined(OS_WIN)
 #include "ui/aura/root_window_host.h"
 #endif
 
 namespace ash {
 namespace internal {
 
@@ skipping 15 matching lines @@
 
 #if defined(OS_WIN)
   gfx::Rect bounds(aura::RootWindowHost::GetNativeScreenSize());
 #else
   gfx::Rect bounds(kDefaultHostWindowX, kDefaultHostWindowY,
                    kDefaultHostWindowWidth, kDefaultHostWindowHeight);
 #endif
 
   int x = 0, y = 0, width, height;
   float scale = 1.0f;
-  if (sscanf(spec.c_str(), "%dx%d*%f", &width, &height, &scale) >= 2 ||
-      sscanf(spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
+  std::vector<std::string> parts;
+  size_t count = Tokenize(spec, "/", &parts);
+  Rotation rotation(ROTATE_0);
+  bool has_overscan = false;
+  std::string main_spec = spec;
+  if (count) {
+    main_spec = parts[0];
+    if (count == 2) {
+      std::string options = parts[1];
+      for (size_t i = 0; i < options.size(); ++i) {
+        char c = options[i];
+        switch (c) {
+          case 'o':
+            has_overscan = true;
+            break;
+          case 'r':  // rotate 90 degrees to 'right'.
+            rotation = ROTATE_90;
+            break;
+          case 'u':  // 180 degrees, 'u'pside-down.
+            rotation = ROTATE_180;
+            break;
+          case 'l':  // rotate 90 degrees to 'left'.
+            rotation = ROTATE_270;
+            break;
+        }
+      }
+    }
+  }
+
+  if (sscanf(main_spec.c_str(), "%dx%d*%f", &width, &height, &scale) >= 2 ||
+      sscanf(main_spec.c_str(), "%d+%d-%dx%d*%f", &x, &y, &width, &height,
              &scale) >= 4) {
     bounds.SetRect(x, y, width, height);
   }
   if (id == gfx::Display::kInvalidDisplayID)
     id = synthesized_display_id++;
   DisplayInfo display_info(
-      id, base::StringPrintf("Display-%d", static_cast<int>(id)), false);
+      id, base::StringPrintf("Display-%d", static_cast<int>(id)), has_overscan);
   display_info.set_device_scale_factor(scale);
+  display_info.set_rotation(rotation);
   display_info.SetBounds(bounds);
   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
            << ", spec=" << spec;
   return display_info;
 }
 
 DisplayInfo::DisplayInfo()
     : id_(gfx::Display::kInvalidDisplayID),
       has_overscan_(false),
+      rotation_(ROTATE_0),
       device_scale_factor_(1.0f),
-      overscan_insets_in_dip_(-1, -1, -1, -1),
+      overscan_insets_in_dip_(0, 0, 0, 0),
       has_custom_overscan_insets_(false) {
 }
 
 DisplayInfo::DisplayInfo(int64 id,
                          const std::string& name,
                          bool has_overscan)
     : id_(id),
       name_(name),
       has_overscan_(has_overscan),
+      rotation_(ROTATE_0),
       device_scale_factor_(1.0f),
-      overscan_insets_in_dip_(-1, -1, -1, -1),
+      overscan_insets_in_dip_(0, 0, 0, 0),
       has_custom_overscan_insets_(false) {
 }
 
 DisplayInfo::~DisplayInfo() {
 }
 
 void DisplayInfo::CopyFromNative(const DisplayInfo& native_info) {
   DCHECK(id_ == native_info.id_);
   name_ = native_info.name_;
   has_overscan_ = native_info.has_overscan_;
 
-  DCHECK(!native_info.original_bounds_in_pixel_.IsEmpty());
-  original_bounds_in_pixel_ = native_info.original_bounds_in_pixel_;
+  DCHECK(!native_info.bounds_in_pixel_.IsEmpty());
   bounds_in_pixel_ = native_info.bounds_in_pixel_;
+  size_in_pixel_ = native_info.size_in_pixel_;
   device_scale_factor_ = native_info.device_scale_factor_;
+  rotation_ = native_info.rotation_;
+  // Don't copy insets as it may be given by preference.  |rotation_|
+  // is treated as a native so that it can be specified in
+  // |CreateFromSpec|.
 }
 
-void DisplayInfo::SetBounds(const gfx::Rect& new_original_bounds) {
-  original_bounds_in_pixel_ = bounds_in_pixel_ = new_original_bounds;
+void DisplayInfo::SetBounds(const gfx::Rect& new_bounds_in_pixel) {
+  bounds_in_pixel_ = new_bounds_in_pixel;
+  size_in_pixel_ = new_bounds_in_pixel.size();
+  UpdateDisplaySize();
 }
 
-void DisplayInfo::UpdateBounds(const gfx::Rect& new_original_bounds) {
-  bool overscan = original_bounds_in_pixel_ != bounds_in_pixel_;
-  original_bounds_in_pixel_ = bounds_in_pixel_ = new_original_bounds;
-  if (overscan) {
-    original_bounds_in_pixel_.Inset(
-        overscan_insets_in_dip_.Scale(-device_scale_factor_));
+void DisplayInfo::UpdateDisplaySize() {
+  size_in_pixel_ = bounds_in_pixel_.size();
+  if (has_custom_overscan_insets_) {
+    gfx::Insets insets_in_pixel =
+        overscan_insets_in_dip_.Scale(device_scale_factor_);
+    size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
+  } else if (has_overscan_) {
+    // Currently we assume 5% overscan and hope for the best if TV claims it
+    // overscan, but doesn't expose how much.
+    // TODO(oshima): The insets has to be applied after rotation.
+    // Fix this.
+    int width = bounds_in_pixel_.width() / 40;
+    int height = bounds_in_pixel_.height() / 40;
+    gfx::Insets insets_in_pixel(height, width, height, width);
+    overscan_insets_in_dip_ =
+        insets_in_pixel.Scale(1.0 / device_scale_factor_);
+    size_in_pixel_.Enlarge(-insets_in_pixel.width(), -insets_in_pixel.height());
+  } else {
+    overscan_insets_in_dip_.Set(0, 0, 0, 0);
   }
-}
 
-void DisplayInfo::UpdateOverscanInfo(bool can_overscan) {
-  bounds_in_pixel_ = original_bounds_in_pixel_;
-  if (can_overscan) {
-    if (has_custom_overscan_insets_) {
-      bounds_in_pixel_.Inset(
-          overscan_insets_in_dip_.Scale(device_scale_factor_));
-    } else if (has_overscan_) {
-      // Currently we assume 5% overscan and hope for the best if TV claims it
-      // overscan, but doesn't expose how much.
-      int width = bounds_in_pixel_.width() / 40;
-      int height = bounds_in_pixel_.height() / 40;
-      gfx::Insets insets_in_pixel(height, width, height, width);
-      overscan_insets_in_dip_ =
-          insets_in_pixel.Scale(1.0 / device_scale_factor_);
-      bounds_in_pixel_.Inset(
-          overscan_insets_in_dip_.Scale(device_scale_factor_));
-    }
-  }
+  if (rotation_ == ROTATE_90 || rotation_ == ROTATE_270)
+    size_in_pixel_.SetSize(size_in_pixel_.height(), size_in_pixel_.width());
 }
 
 void DisplayInfo::SetOverscanInsets(bool custom,
                                     const gfx::Insets& insets_in_dip) {
   has_custom_overscan_insets_ = custom;
   overscan_insets_in_dip_ = insets_in_dip;
 }
 
+gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
+  return overscan_insets_in_dip_.Scale(device_scale_factor_);
+}
+
 std::string DisplayInfo::ToString() const {
+  int rotation_degree = static_cast<int>(rotation_) * 90;
   return base::StringPrintf(
-      "DisplayInfo[%lld] bounds=%s, original=%s, scale=%f, overscan=%s",
+      "DisplayInfo[%lld] bounds=%s, size=%s, scale=%f, "
+      "overscan=%s, rotation=%d",
       static_cast<long long int>(id_),
       bounds_in_pixel_.ToString().c_str(),
-      original_bounds_in_pixel_.ToString().c_str(),
+      size_in_pixel_.ToString().c_str(),
       device_scale_factor_,
-      overscan_insets_in_dip_.ToString().c_str());
+      overscan_insets_in_dip_.ToString().c_str(),
+      rotation_degree);
 }
 
 }  // namespace internal
 }  // namespace ash