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// Copyright (c) 2010 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/instant/instant_controller.h"
#include "base/command_line.h"
#include "chrome/browser/autocomplete/autocomplete.h"
#include "chrome/browser/instant/instant_delegate.h"
#include "chrome/browser/instant/instant_loader.h"
#include "chrome/browser/instant/instant_loader_manager.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/search_engines/template_url.h"
#include "chrome/browser/search_engines/template_url_model.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/url_constants.h"
// static
bool InstantController::IsEnabled() {
static bool enabled = false;
static bool checked = false;
if (!checked) {
checked = true;
enabled = CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableMatchPreview);
}
return enabled;
}
InstantController::InstantController(InstantDelegate* delegate)
: delegate_(delegate),
tab_contents_(NULL),
is_active_(false),
commit_on_mouse_up_(false),
last_transition_type_(PageTransition::LINK) {
}
InstantController::~InstantController() {
}
void InstantController::Update(TabContents* tab_contents,
const AutocompleteMatch& match,
const string16& user_text,
string16* suggested_text) {
if (tab_contents != tab_contents_)
DestroyPreviewContents();
const GURL& url = match.destination_url;
tab_contents_ = tab_contents;
commit_on_mouse_up_ = false;
last_transition_type_ = match.transition;
if (loader_manager_.get() && loader_manager_->active_loader()->url() == url)
return;
if (url.is_empty() || !url.is_valid() || !ShouldShowPreviewFor(url)) {
DestroyPreviewContents();
return;
}
if (!loader_manager_.get())
loader_manager_.reset(new InstantLoaderManager(this));
const TemplateURL* template_url = match.template_url;
if (match.type == AutocompleteMatch::SEARCH_WHAT_YOU_TYPED ||
match.type == AutocompleteMatch::SEARCH_HISTORY ||
match.type == AutocompleteMatch::SEARCH_SUGGEST) {
TemplateURLModel* model = tab_contents->profile()->GetTemplateURLModel();
template_url = model ? model->GetDefaultSearchProvider() : NULL;
}
// TODO(sky): remove the id check. It's only necessary because the search
// engine saved to prefs doesn't have an id. Jean-luc is fixing separately.
if (template_url && (!template_url->supports_instant() ||
!template_url->id() ||
!TemplateURL::SupportsReplacement(template_url))) {
template_url = NULL;
}
TemplateURLID template_url_id = template_url ? template_url->id() : 0;
InstantLoader* old_loader = loader_manager_->current_loader();
scoped_ptr<InstantLoader> owned_loader;
InstantLoader* new_loader =
loader_manager_->UpdateLoader(template_url_id, &owned_loader);
new_loader->SetOmniboxBounds(omnibox_bounds_);
new_loader->Update(tab_contents, match, user_text, template_url,
suggested_text);
if (old_loader != new_loader && new_loader->ready())
delegate_->ShowInstant(new_loader->preview_contents());
}
void InstantController::SetOmniboxBounds(const gfx::Rect& bounds) {
if (omnibox_bounds_ == bounds)
return;
if (loader_manager_.get()) {
if (loader_manager_->current_loader())
loader_manager_->current_loader()->SetOmniboxBounds(bounds);
if (loader_manager_->pending_loader())
loader_manager_->pending_loader()->SetOmniboxBounds(bounds);
}
}
void InstantController::DestroyPreviewContents() {
if (!loader_manager_.get()) {
// We're not showing anything, nothing to do.
return;
}
delegate_->HideInstant();
delete ReleasePreviewContents(INSTANT_COMMIT_DESTROY);
}
void InstantController::CommitCurrentPreview(InstantCommitType type) {
DCHECK(loader_manager_.get());
DCHECK(loader_manager_->current_loader());
delegate_->CommitInstant(ReleasePreviewContents(type));
}
void InstantController::SetCommitOnMouseUp() {
commit_on_mouse_up_ = true;
}
bool InstantController::IsMouseDownFromActivate() {
DCHECK(loader_manager_.get());
DCHECK(loader_manager_->current_loader());
return loader_manager_->current_loader()->IsMouseDownFromActivate();
}
TabContents* InstantController::ReleasePreviewContents(InstantCommitType type) {
if (!loader_manager_.get())
return NULL;
scoped_ptr<InstantLoader> loader(loader_manager_->ReleaseCurrentLoader());
TabContents* tab = loader->ReleasePreviewContents(type);
is_active_ = false;
omnibox_bounds_ = gfx::Rect();
commit_on_mouse_up_ = false;
loader_manager_.reset(NULL);
return tab;
}
TabContents* InstantController::GetPreviewContents() {
return loader_manager_.get() ?
loader_manager_->current_loader()->preview_contents() : NULL;
}
bool InstantController::IsShowingInstant() {
return loader_manager_.get() &&
loader_manager_->current_loader()->is_showing_instant();
}
void InstantController::ShowInstantLoader(InstantLoader* loader) {
DCHECK(loader_manager_.get());
if (loader_manager_->current_loader() == loader) {
is_active_ = true;
delegate_->ShowInstant(loader->preview_contents());
} else if (loader_manager_->pending_loader() == loader) {
scoped_ptr<InstantLoader> old_loader;
loader_manager_->MakePendingCurrent(&old_loader);
delegate_->ShowInstant(loader->preview_contents());
} else {
NOTREACHED();
}
}
void InstantController::SetSuggestedTextFor(InstantLoader* loader,
const string16& text) {
if (loader_manager_->current_loader() == loader)
delegate_->SetSuggestedText(text);
}
gfx::Rect InstantController::GetInstantBounds() {
return delegate_->GetInstantBounds();
}
bool InstantController::ShouldCommitInstantOnMouseUp() {
return commit_on_mouse_up_;
}
void InstantController::CommitInstantLoader(InstantLoader* loader) {
if (loader_manager_.get() && loader_manager_->current_loader() == loader) {
CommitCurrentPreview(INSTANT_COMMIT_FOCUS_LOST);
} else {
// This can happen if the mouse was down, we swapped out the preview and
// the mouse was released. Generally this shouldn't happen, but if it does
// revert.
DestroyPreviewContents();
}
}
bool InstantController::ShouldShowPreviewFor(const GURL& url) {
return !url.SchemeIs(chrome::kJavaScriptScheme);
}
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