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// Copyright (c) 2011 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/ui/find_bar/find_tab_helper.h"
#include <vector>
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/find_bar/find_bar_state.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/tab_contents/tab_contents.h"
#include "content/common/notification_service.h"
#include "content/common/view_messages.h"
// static
int FindTabHelper::find_request_id_counter_ = -1;
FindTabHelper::FindTabHelper(TabContents* tab_contents)
: TabContentsObserver(tab_contents),
find_ui_active_(false),
find_op_aborted_(false),
current_find_request_id_(find_request_id_counter_++),
last_search_case_sensitive_(false),
last_search_result_() {
}
FindTabHelper::~FindTabHelper() {
}
void FindTabHelper::StartFinding(string16 search_string,
bool forward_direction,
bool case_sensitive) {
// If search_string is empty, it means FindNext was pressed with a keyboard
// shortcut so unless we have something to search for we return early.
if (search_string.empty() && find_text_.empty()) {
string16 last_search_prepopulate_text =
FindBarState::GetLastPrepopulateText(tab_contents()->profile());
// Try the last thing we searched for on this tab, then the last thing
// searched for on any tab.
if (!previous_find_text_.empty())
search_string = previous_find_text_;
else if (!last_search_prepopulate_text.empty())
search_string = last_search_prepopulate_text;
else
return;
}
// Keep track of the previous search.
previous_find_text_ = find_text_;
// This is a FindNext operation if we are searching for the same text again,
// or if the passed in search text is empty (FindNext keyboard shortcut). The
// exception to this is if the Find was aborted (then we don't want FindNext
// because the highlighting has been cleared and we need it to reappear). We
// therefore treat FindNext after an aborted Find operation as a full fledged
// Find.
bool find_next = (find_text_ == search_string || search_string.empty()) &&
(last_search_case_sensitive_ == case_sensitive) &&
!find_op_aborted_;
if (!find_next)
current_find_request_id_ = find_request_id_counter_++;
if (!search_string.empty())
find_text_ = search_string;
last_search_case_sensitive_ = case_sensitive;
find_op_aborted_ = false;
// Keep track of what the last search was across the tabs.
FindBarState* find_bar_state = tab_contents()->profile()->GetFindBarState();
find_bar_state->set_last_prepopulate_text(find_text_);
tab_contents()->render_view_host()->StartFinding(current_find_request_id_,
find_text_,
forward_direction,
case_sensitive,
find_next);
}
void FindTabHelper::StopFinding(
FindBarController::SelectionAction selection_action) {
if (selection_action == FindBarController::kClearSelection) {
// kClearSelection means the find string has been cleared by the user, but
// the UI has not been dismissed. In that case we want to clear the
// previously remembered search (http://crbug.com/42639).
previous_find_text_ = string16();
} else {
find_ui_active_ = false;
if (!find_text_.empty())
previous_find_text_ = find_text_;
}
find_text_.clear();
find_op_aborted_ = true;
last_search_result_ = FindNotificationDetails();
tab_contents()->render_view_host()->StopFinding(selection_action);
}
bool FindTabHelper::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(FindTabHelper, message)
IPC_MESSAGE_HANDLER(ViewHostMsg_Find_Reply, OnFindReply)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void FindTabHelper::OnFindReply(int request_id,
int number_of_matches,
const gfx::Rect& selection_rect,
int active_match_ordinal,
bool final_update) {
// Ignore responses for requests that have been aborted.
// Ignore responses for requests other than the one we have most recently
// issued. That way we won't act on stale results when the user has
// already typed in another query.
if (!find_op_aborted_ && request_id == current_find_request_id_) {
if (number_of_matches == -1)
number_of_matches = last_search_result_.number_of_matches();
if (active_match_ordinal == -1)
active_match_ordinal = last_search_result_.active_match_ordinal();
gfx::Rect selection = selection_rect;
if (selection.IsEmpty())
selection = last_search_result_.selection_rect();
// Notify the UI, automation and any other observers that a find result was
// found.
last_search_result_ = FindNotificationDetails(
request_id, number_of_matches, selection, active_match_ordinal,
final_update);
NotificationService::current()->Notify(
NotificationType::FIND_RESULT_AVAILABLE,
Source<TabContents>(tab_contents()),
Details<FindNotificationDetails>(&last_search_result_));
}
// Send a notification to the renderer that we are ready to receive more
// results from the scoping effort of the Find operation. The FindInPage
// scoping is asynchronous and periodically sends results back up to the
// browser using IPC. In an effort to not spam the browser we have the
// browser send an ACK for each FindReply message and have the renderer
// queue up the latest status message while waiting for this ACK.
Send(new ViewMsg_FindReplyACK(routing_id()));
}
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