1/*
2 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this program; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21#include "config.h"
22#include "TapHighlightController.h"
23
24#if ENABLE(TOUCH_EVENTS)
25
26#include "ShareableBitmap.h"
27#include "WKPage.h"
28#include "WebCoreArgumentCoders.h"
29#include "WebPage.h"
30#include "WebPageProxyMessages.h"
31#include "WebProcess.h"
32#include <WebCore/FocusController.h>
33#include <WebCore/Frame.h>
34#include <WebCore/FrameView.h>
35#include <WebCore/GestureTapHighlighter.h>
36#include <WebCore/GraphicsContext.h>
37#include <WebCore/Page.h>
38#include <WebCore/RenderElement.h>
39
40using namespace std;
41using namespace WebCore;
42
43namespace WebKit {
44
45TapHighlightController::TapHighlightController(WebPage* webPage)
46    : m_webPage(webPage)
47    , m_overlay(0)
48{
49}
50
51TapHighlightController::~TapHighlightController()
52{
53}
54
55void TapHighlightController::highlight(Node* node)
56{
57    ASSERT(node);
58
59    m_path = GestureTapHighlighter::pathForNodeHighlight(node);
60    m_color = node->renderer()->style().tapHighlightColor();
61
62    if (!m_overlay) {
63        RefPtr<PageOverlay> overlay = PageOverlay::create(this);
64        m_overlay = overlay.get();
65        m_webPage->installPageOverlay(overlay.release());
66    } else
67        m_overlay->setNeedsDisplay();
68}
69
70void TapHighlightController::hideHighlight()
71{
72    if (m_overlay)
73        m_webPage->uninstallPageOverlay(m_overlay, PageOverlay::FadeMode::Fade);
74}
75
76void TapHighlightController::pageOverlayDestroyed(PageOverlay*)
77{
78}
79
80void TapHighlightController::willMoveToWebPage(PageOverlay*, WebPage* webPage)
81{
82    if (webPage)
83        return;
84
85    // The page overlay is moving away from the web page, reset it.
86    ASSERT(m_overlay);
87    m_overlay = 0;
88}
89
90void TapHighlightController::didMoveToWebPage(PageOverlay*, WebPage*)
91{
92}
93
94static Color highlightColor(Color baseColor, float fractionFadedIn)
95{
96    return Color(baseColor.red(), baseColor.green(), baseColor.blue(), int(baseColor.alpha() * fractionFadedIn));
97}
98
99void TapHighlightController::drawRect(PageOverlay* /*pageOverlay*/, GraphicsContext& context, const IntRect& /*dirtyRect*/)
100{
101    if (m_path.isEmpty())
102        return;
103
104    {
105        GraphicsContextStateSaver stateSaver(context);
106        context.setFillColor(highlightColor(m_color, 0.5f), ColorSpaceSRGB);
107        context.fillPath(m_path);
108    }
109}
110
111bool TapHighlightController::mouseEvent(PageOverlay*, const WebMouseEvent&)
112{
113    return false;
114}
115
116} // namespace WebKit
117
118#endif // ENABLE(TOUCH_EVENTS)
119