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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/chromeos/tablet_mode/tablet_mode_page_behavior.h"
#include <utility>
#include "base/functional/bind.h"
#include "chrome/browser/chromeos/arc/arc_web_contents_data.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_tab_strip_tracker.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/web_contents.h"
#include "ui/base/pointer/touch_ui_controller.h"
#include "ui/display/screen.h"
#include "ui/display/tablet_state.h"
TabletModePageBehavior::TabletModePageBehavior() {
display::Screen::GetScreen()->AddObserver(this);
OnTabletModeToggled(display::Screen::GetScreen()->InTabletMode());
}
TabletModePageBehavior::~TabletModePageBehavior() {
display::Screen::GetScreen()->RemoveObserver(this);
}
void TabletModePageBehavior::OnTabletModeToggled(bool enabled) {
SetMobileLikeBehaviorEnabled(enabled);
ui::TouchUiController::Get()->OnTabletModeToggled(enabled);
}
void TabletModePageBehavior::OnDisplayTabletStateChanged(
display::TabletState state) {
switch (state) {
case display::TabletState::kInTabletMode:
OnTabletModeToggled(true);
return;
case display::TabletState::kInClamshellMode:
OnTabletModeToggled(false);
return;
case display::TabletState::kEnteringTabletMode:
case display::TabletState::kExitingTabletMode:
break;
}
}
bool TabletModePageBehavior::ShouldTrackBrowser(Browser* browser) {
return display::Screen::GetScreen()->InTabletMode();
}
void TabletModePageBehavior::OnTabStripModelChanged(
TabStripModel* tab_strip_model,
const TabStripModelChange& change,
const TabStripSelectionChange& selection) {
if (change.type() != TabStripModelChange::kInserted)
return;
// We limit the mobile-like behavior to webcontents in tabstrips since many
// apps and extensions draw their own caption buttons and header frames. We
// don't want those to shrink down and resize to fit the width of their
// windows like webpages on mobile do. So this behavior is limited to webpages
// in tabs and packaged apps.
for (const auto& contents : change.GetInsert()->contents)
contents.contents->NotifyPreferencesChanged();
}
void TabletModePageBehavior::SetMobileLikeBehaviorEnabled(bool enabled) {
// Toggling tablet mode on/off should trigger refreshing the WebKit
// preferences, since in tablet mode, we enable certain mobile-like features
// such as "double tap to zoom", "shrink page contents to fit", ... etc.
// Do this only for webpages that belong to existing browsers as well as
// future browsers and webcontents.
if (enabled) {
// On calling Init() of the |tab_strip_tracker_|, we will get a call to
// TabInsertedAt() for all the existing webcontents, upon which we will
// trigger a refresh of their WebKit preferences.
tab_strip_tracker_ = std::make_unique<BrowserTabStripTracker>(this, this);
tab_strip_tracker_->Init();
} else {
// Manually trigger a refresh for the existing webcontents' preferences.
for (Browser* browser : *BrowserList::GetInstance()) {
TabStripModel* tab_strip_model = browser->tab_strip_model();
for (int i = 0; i < tab_strip_model->count(); ++i) {
content::WebContents* web_contents =
tab_strip_model->GetWebContentsAt(i);
DCHECK(web_contents);
web_contents->NotifyPreferencesChanged();
// For a tab that is requesting its mobile version site (via
// chrome::ToggleRequestTabletSite()), and is not originated from ARC
// context, return to its normal version site when exiting tablet mode.
content::NavigationController& controller =
web_contents->GetController();
content::NavigationEntry* entry = controller.GetLastCommittedEntry();
if (entry && entry->GetIsOverridingUserAgent() &&
!web_contents->GetUserData(
arc::ArcWebContentsData::ArcWebContentsData::
kArcTransitionFlag)) {
entry->SetIsOverridingUserAgent(false);
controller.LoadOriginalRequestURL();
}
}
}
tab_strip_tracker_ = nullptr;
}
}
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