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// Copyright 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 "ash/display/display_change_observer_chromeos.h"
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include "ash/ash_switches.h"
#include "ash/display/display_info.h"
#include "ash/display/display_layout_store.h"
#include "ash/display/display_manager.h"
#include "ash/shell.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "chromeos/display/output_util.h"
#include "grit/ash_strings.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/x/x11_util.h"
#include "ui/compositor/dip_util.h"
#include "ui/gfx/display.h"
namespace ash {
namespace internal {
using chromeos::OutputConfigurator;
namespace {
// The DPI threshold to detect high density screen.
// Higher DPI than this will use device_scale_factor=2.
const unsigned int kHighDensityDPIThreshold = 160;
// 1 inch in mm.
const float kInchInMm = 25.4f;
// Resolution list are sorted by the area in pixels and the larger
// one comes first.
struct ResolutionSorter {
bool operator()(const Resolution& a, const Resolution& b) {
return a.size.width() * a.size.height() > b.size.width() * b.size.height();
}
};
} // namespace
// static
std::vector<Resolution> DisplayChangeObserver::GetResolutionList(
const OutputConfigurator::OutputSnapshot& output) {
typedef std::map<std::pair<int,int>, Resolution> ResolutionMap;
ResolutionMap resolution_map;
for (std::map<RRMode, OutputConfigurator::ModeInfo>::const_iterator it =
output.mode_infos.begin(); it != output.mode_infos.end(); ++it) {
const OutputConfigurator::ModeInfo& mode_info = it->second;
const std::pair<int, int> size(mode_info.width, mode_info.height);
const Resolution resolution(gfx::Size(mode_info.width, mode_info.height),
mode_info.interlaced);
// Add the resolution if it isn't already present and override interlaced
// resolutions with non-interlaced ones.
ResolutionMap::iterator resolution_it = resolution_map.find(size);
if (resolution_it == resolution_map.end())
resolution_map.insert(std::make_pair(size, resolution));
else if (resolution_it->second.interlaced && !resolution.interlaced)
resolution_it->second = resolution;
}
std::vector<Resolution> resolution_list;
for (ResolutionMap::const_iterator iter = resolution_map.begin();
iter != resolution_map.end();
++iter) {
resolution_list.push_back(iter->second);
}
std::sort(resolution_list.begin(), resolution_list.end(), ResolutionSorter());
return resolution_list;
}
DisplayChangeObserver::DisplayChangeObserver() {
Shell::GetInstance()->AddShellObserver(this);
}
DisplayChangeObserver::~DisplayChangeObserver() {
Shell::GetInstance()->RemoveShellObserver(this);
}
chromeos::OutputState DisplayChangeObserver::GetStateForDisplayIds(
const std::vector<int64>& display_ids) const {
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kAshForceMirrorMode)) {
return chromeos::STATE_DUAL_MIRROR;
}
CHECK_EQ(2U, display_ids.size());
DisplayIdPair pair = std::make_pair(display_ids[0], display_ids[1]);
DisplayLayout layout = Shell::GetInstance()->display_manager()->
layout_store()->GetRegisteredDisplayLayout(pair);
return layout.mirrored ?
chromeos::STATE_DUAL_MIRROR : chromeos::STATE_DUAL_EXTENDED;
}
bool DisplayChangeObserver::GetResolutionForDisplayId(int64 display_id,
int* width,
int* height) const {
gfx::Size resolution;
if (!Shell::GetInstance()->display_manager()->
GetSelectedResolutionForDisplayId(display_id, &resolution)) {
return false;
}
*width = resolution.width();
*height = resolution.height();
return true;
}
void DisplayChangeObserver::OnDisplayModeChanged(
const std::vector<OutputConfigurator::OutputSnapshot>& outputs) {
std::vector<DisplayInfo> displays;
std::set<int64> ids;
for (size_t i = 0; i < outputs.size(); ++i) {
const OutputConfigurator::OutputSnapshot& output = outputs[i];
if (output.is_internal &&
gfx::Display::InternalDisplayId() == gfx::Display::kInvalidDisplayID) {
// Fall back to output index. crbug.com/180100
gfx::Display::SetInternalDisplayId(
output.display_id == gfx::Display::kInvalidDisplayID ? output.index :
output.display_id);
}
const OutputConfigurator::ModeInfo* mode_info =
OutputConfigurator::GetModeInfo(output, output.current_mode);
if (!mode_info)
continue;
float device_scale_factor = 1.0f;
if (!ui::IsXDisplaySizeBlackListed(output.width_mm, output.height_mm) &&
(kInchInMm * mode_info->width / output.width_mm) >
kHighDensityDPIThreshold) {
device_scale_factor = 2.0f;
}
gfx::Rect display_bounds(
output.x, output.y, mode_info->width, mode_info->height);
std::vector<Resolution> resolutions;
if (!output.is_internal)
resolutions = GetResolutionList(output);
std::string name = output.is_internal ?
l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME) :
chromeos::GetDisplayName(output.output);
if (name.empty())
name = l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
bool has_overscan = false;
chromeos::GetOutputOverscanFlag(output.output, &has_overscan);
int64 id = output.display_id;
if (id == gfx::Display::kInvalidDisplayID || ids.find(id) != ids.end())
id = output.index;
ids.insert(id);
displays.push_back(DisplayInfo(id, name, has_overscan));
displays.back().set_device_scale_factor(device_scale_factor);
displays.back().SetBounds(display_bounds);
displays.back().set_native(true);
displays.back().set_resolutions(resolutions);
displays.back().set_touch_support(
output.touch_device_id == 0 ? gfx::Display::TOUCH_SUPPORT_UNAVAILABLE :
gfx::Display::TOUCH_SUPPORT_AVAILABLE);
}
// DisplayManager can be null during the boot.
Shell::GetInstance()->display_manager()->OnNativeDisplaysChanged(displays);
}
void DisplayChangeObserver::OnAppTerminating() {
#if defined(USE_ASH)
// Stop handling display configuration events once the shutdown
// process starts. crbug.com/177014.
Shell::GetInstance()->output_configurator()->Stop();
#endif
}
} // namespace internal
} // namespace ash
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