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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/find_bar_controller.h"
#include "base/i18n/rtl.h"
#include "build/build_config.h"
#include "chrome/browser/find_bar.h"
#include "chrome/browser/find_bar_state.h"
#include "chrome/browser/tab_contents/navigation_entry.h"
#include "chrome/common/notification_service.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "gfx/rect.h"
// The minimum space between the FindInPage window and the search result.
static const int kMinFindWndDistanceFromSelection = 5;
FindBarController::FindBarController(FindBar* find_bar)
: find_bar_(find_bar),
tab_contents_(NULL),
last_reported_matchcount_(0) {
}
FindBarController::~FindBarController() {
DCHECK(!tab_contents_);
}
void FindBarController::Show() {
// Only show the animation if we're not already showing a find bar for the
// selected TabContents.
if (!tab_contents_->find_ui_active()) {
MaybeSetPrepopulateText();
tab_contents_->set_find_ui_active(true);
find_bar_->Show(true);
}
find_bar_->SetFocusAndSelection();
}
void FindBarController::EndFindSession(SelectionAction action) {
find_bar_->Hide(true);
// |tab_contents_| can be NULL for a number of reasons, for example when the
// tab is closing. We must guard against that case. See issue 8030.
if (tab_contents_) {
// When we hide the window, we need to notify the renderer that we are done
// for now, so that we can abort the scoping effort and clear all the
// tickmarks and highlighting.
tab_contents_->StopFinding(action);
if (action != kKeepSelection)
find_bar_->ClearResults(tab_contents_->find_result());
// When we get dismissed we restore the focus to where it belongs.
find_bar_->RestoreSavedFocus();
}
}
void FindBarController::ChangeTabContents(TabContents* contents) {
if (tab_contents_) {
registrar_.RemoveAll();
find_bar_->StopAnimation();
}
tab_contents_ = contents;
// Hide any visible find window from the previous tab if NULL |tab_contents|
// is passed in or if the find UI is not active in the new tab.
if (find_bar_->IsFindBarVisible() &&
(!tab_contents_ || !tab_contents_->find_ui_active())) {
find_bar_->Hide(false);
}
if (!tab_contents_)
return;
registrar_.Add(this, NotificationType::FIND_RESULT_AVAILABLE,
Source<TabContents>(tab_contents_));
registrar_.Add(this, NotificationType::NAV_ENTRY_COMMITTED,
Source<NavigationController>(&tab_contents_->controller()));
MaybeSetPrepopulateText();
if (tab_contents_->find_ui_active()) {
// A tab with a visible find bar just got selected and we need to show the
// find bar but without animation since it was already animated into its
// visible state. We also want to reset the window location so that
// we don't surprise the user by popping up to the left for no apparent
// reason.
find_bar_->Show(false);
}
UpdateFindBarForCurrentResult();
}
////////////////////////////////////////////////////////////////////////////////
// FindBarHost, NotificationObserver implementation:
void FindBarController::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type == NotificationType::FIND_RESULT_AVAILABLE) {
// Don't update for notifications from TabContentses other than the one we
// are actively tracking.
if (Source<TabContents>(source).ptr() == tab_contents_) {
UpdateFindBarForCurrentResult();
if (tab_contents_->find_result().final_update() &&
tab_contents_->find_result().number_of_matches() == 0) {
const string16& last_search = tab_contents_->previous_find_text();
const string16& current_search = tab_contents_->find_text();
if (last_search.find(current_search) != 0)
find_bar_->AudibleAlert();
}
}
} else if (type == NotificationType::NAV_ENTRY_COMMITTED) {
NavigationController* source_controller =
Source<NavigationController>(source).ptr();
if (source_controller == &tab_contents_->controller()) {
NavigationController::LoadCommittedDetails* commit_details =
Details<NavigationController::LoadCommittedDetails>(details).ptr();
PageTransition::Type transition_type =
commit_details->entry->transition_type();
// We hide the FindInPage window when the user navigates away, except on
// reload.
if (find_bar_->IsFindBarVisible()) {
if (PageTransition::StripQualifier(transition_type) !=
PageTransition::RELOAD) {
EndFindSession(kKeepSelection);
} else {
// On Reload we want to make sure FindNext is converted to a full Find
// to make sure highlights for inactive matches are repainted.
tab_contents_->set_find_op_aborted(true);
}
}
}
}
}
// static
gfx::Rect FindBarController::GetLocationForFindbarView(
gfx::Rect view_location,
const gfx::Rect& dialog_bounds,
const gfx::Rect& avoid_overlapping_rect) {
if (base::i18n::IsRTL()) {
int boundary = dialog_bounds.width() - view_location.width();
view_location.set_x(std::min(view_location.x(), boundary));
} else {
view_location.set_x(std::max(view_location.x(), dialog_bounds.x()));
}
gfx::Rect new_pos = view_location;
// If the selection rectangle intersects the current position on screen then
// we try to move our dialog to the left (right for RTL) of the selection
// rectangle.
if (!avoid_overlapping_rect.IsEmpty() &&
avoid_overlapping_rect.Intersects(new_pos)) {
if (base::i18n::IsRTL()) {
new_pos.set_x(avoid_overlapping_rect.x() +
avoid_overlapping_rect.width() +
(2 * kMinFindWndDistanceFromSelection));
// If we moved it off-screen to the right, we won't move it at all.
if (new_pos.x() + new_pos.width() > dialog_bounds.width())
new_pos = view_location; // Reset.
} else {
new_pos.set_x(avoid_overlapping_rect.x() - new_pos.width() -
kMinFindWndDistanceFromSelection);
// If we moved it off-screen to the left, we won't move it at all.
if (new_pos.x() < 0)
new_pos = view_location; // Reset.
}
}
return new_pos;
}
void FindBarController::UpdateFindBarForCurrentResult() {
const FindNotificationDetails& find_result = tab_contents_->find_result();
// Avoid bug 894389: When a new search starts (and finds something) it reports
// an interim match count result of 1 before the scoping effort starts. This
// is to provide feedback as early as possible that we will find something.
// As you add letters to the search term, this creates a flashing effect when
// we briefly show "1 of 1" matches because there is a slight delay until
// the scoping effort starts updating the match count. We avoid this flash by
// ignoring interim results of 1 if we already have a positive number.
if (find_result.number_of_matches() > -1) {
if (last_reported_matchcount_ > 0 &&
find_result.number_of_matches() == 1 &&
!find_result.final_update())
return; // Don't let interim result override match count.
last_reported_matchcount_ = find_result.number_of_matches();
}
find_bar_->UpdateUIForFindResult(find_result, tab_contents_->find_text());
}
void FindBarController::MaybeSetPrepopulateText() {
#if !defined(OS_MACOSX)
// Find out what we should show in the find text box. Usually, this will be
// the last search in this tab, but if no search has been issued in this tab
// we use the last search string (from any tab).
string16 find_string = tab_contents_->find_text();
if (find_string.empty())
find_string = tab_contents_->previous_find_text();
if (find_string.empty()) {
find_string =
FindBarState::GetLastPrepopulateText(tab_contents_->profile());
}
// Update the find bar with existing results and search text, regardless of
// whether or not the find bar is visible, so that if it's subsequently
// shown it is showing the right state for this tab. We update the find text
// _first_ since the FindBarView checks its emptiness to see if it should
// clear the result count display when there's nothing in the box.
find_bar_->SetFindText(find_string);
#else
// Having a per-tab find_string is not compatible with OS X's find pasteboard,
// so we always have the same find text in all find bars. This is done through
// the find pasteboard mechanism, so don't set the text here.
#endif
}
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