Refactoring display configuration state to allow generic state objects

ui/display/chromeos/x11/display_snapshot_x11.cc

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Copyright 2014 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 "chromeos/display/output_util.h"
+#include "ui/display/chromeos/x11/display_snapshot_x11.h"
 
-#include <X11/extensions/Xrandr.h>
-#include <X11/Xatom.h>
 #include <X11/Xlib.h>
 
-#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/x11/edid_parser_x11.h"
+#include "ui/display/chromeos/x11/display_mode_x11.h"
 
-namespace chromeos {
+namespace ui {
+
 namespace {
 
-// Prefixes for the built-in displays.
-const char kInternal_LVDS[] = "LVDS";
-const char kInternal_eDP[] = "eDP";
-const char kInternal_DSI[] = "DSI";
-
 // Gets some useful data from the specified output device, such like
 // manufacturer's ID, product code, and human readable name. Returns false if it
 // fails to get those data and doesn't touch manufacturer ID/product code/name.
 // NULL can be passed for unwanted output parameters.
 bool GetOutputDeviceData(XID output,
                          uint16* manufacturer_id,
                          std::string* human_readable_name) {
   unsigned long nitems = 0;
-  unsigned char *prop = NULL;
+  unsigned char* prop = NULL;
   if (!base::GetEDIDProperty(output, &nitems, &prop))
     return false;
 
   bool result = base::ParseOutputDeviceData(
       prop, nitems, manufacturer_id, human_readable_name);
   XFree(prop);
   return result;
 }
 
-}  // namespace
-
-std::string GetDisplayName(XID output_id) {
-  std::string display_name;
-  GetOutputDeviceData(output_id, NULL, &display_name);
-  return display_name;
-}
-
-bool GetOutputOverscanFlag(XID output, bool* flag) {
-  unsigned long nitems = 0;
-  unsigned char *prop = NULL;
-  if (!base::GetEDIDProperty(output, &nitems, &prop))
-    return false;
-
-  bool found = ParseOutputOverscanFlag(prop, nitems, flag);
-  XFree(prop);
-  return found;
-}
-
 bool ParseOutputOverscanFlag(const unsigned char* prop,
                              unsigned long nitems,
-                             bool *flag) {
+                             bool* flag) {
   // See http://en.wikipedia.org/wiki/Extended_display_identification_data
   // for the extension format of EDID.  Also see EIA/CEA-861 spec for
   // the format of the extensions and how video capability is encoded.
   //  - byte 0: tag.  should be 02h.
   //  - byte 1: revision.  only cares revision 3 (03h).
   //  - byte 4-: data block.
   const unsigned int kExtensionBase = 128;
   const unsigned int kExtensionSize = 128;
   const unsigned int kNumExtensionsOffset = 126;
   const unsigned int kDataBlockOffset = 4;
@@ skipping 56 matching lines @@
       } else {
         *flag = false;
       }
       return true;
     }
   }
 
   return false;
 }
 
-bool IsInternalOutputName(const std::string& name) {
-  return name.find(kInternal_LVDS) == 0 || name.find(kInternal_eDP) == 0 ||
-      name.find(kInternal_DSI) == 0;
+}  // namespace
+
+DisplaySnapshotX11::DisplaySnapshotX11(
+    int64_t display_id,
+    bool has_proper_display_id,
+    const gfx::Point& origin,
+    const gfx::Size& physical_size,
+    OutputType type,
+    bool is_aspect_preserving_scaling,
+    const std::vector<const DisplayMode*>& modes,
+    const DisplayMode* current_mode,
+    const DisplayMode* native_mode,
+    RROutput output,
+    RRCrtc crtc,
+    int index)
+    : DisplaySnapshot(display_id,
+                      has_proper_display_id,
+                      origin,
+                      physical_size,
+                      type,
+                      is_aspect_preserving_scaling,
+                      modes,
+                      current_mode,
+                      native_mode),
+      output_(output),
+      crtc_(crtc),
+      index_(index) {}
+
+DisplaySnapshotX11::~DisplaySnapshotX11() {}
+
+std::string DisplaySnapshotX11::GetDisplayName() {
+  std::string display_name;
+  GetOutputDeviceData(output_, NULL, &display_name);
+  return display_name;
 }
 
-const XRRModeInfo* FindXRRModeInfo(const XRRScreenResources* screen_resources,
-                                   XID current_mode) {
-  for (int m = 0; m < screen_resources->nmode; m++) {
-    XRRModeInfo *mode = &screen_resources->modes[m];
-    if (mode->id == current_mode)
-      return mode;
-  }
-  return NULL;
+bool DisplaySnapshotX11::GetOverscanFlag() {
+  unsigned long nitems = 0;
+  unsigned char* prop = NULL;
+  bool flag = false;
+  if (!base::GetEDIDProperty(output_, &nitems, &prop))
+    return false;
+
+  ParseOutputOverscanFlag(prop, nitems, &flag);
+  XFree(prop);
+
+  return flag;
 }
 
-namespace test {
-
-XRRModeInfo CreateModeInfo(int id,
-                           int width,
-                           int height,
-                           bool interlaced,
-                           float refresh_rate) {
-  XRRModeInfo mode_info = {0};
-  mode_info.id = id;
-  mode_info.width = width;
-  mode_info.height = height;
-  if (interlaced)
-    mode_info.modeFlags = RR_Interlace;
-  if (refresh_rate != 0.0f) {
-    mode_info.hTotal = 1;
-    mode_info.vTotal = 1;
-    mode_info.dotClock = refresh_rate;
-  }
-  return mode_info;
+std::string DisplaySnapshotX11::ToString() const {
+  return base::StringPrintf(
+      "[type=%d, output=%ld, crtc=%ld, mode=%ld, dim=%dx%d]",
+      type_,
+      output_,
+      crtc_,
+      current_mode_
+          ? static_cast<const DisplayModeX11*>(current_mode_)->mode_id()
+          : 0,
+      physical_size_.width(),
+      physical_size_.height());
 }
 
-}  // namespace test
-
-}  // namespace chromeos
+}  // namespace ui