1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "ExternalPopupMenu.h"
33
34#include "FrameView.h"
35#include "IntPoint.h"
36#include "PopupMenuClient.h"
37#include "TextDirection.h"
38#include "WebExternalPopupMenu.h"
39#include "WebMenuItemInfo.h"
40#include "WebPopupMenuInfo.h"
41#include "WebVector.h"
42#include "WebViewClient.h"
43
44using namespace WebCore;
45
46namespace WebKit {
47
48ExternalPopupMenu::ExternalPopupMenu(PopupMenuClient* popupMenuClient,
49                                     WebViewClient* webViewClient)
50    : m_popupMenuClient(popupMenuClient)
51    , m_webViewClient(webViewClient)
52    , m_webExternalPopupMenu(0)
53{
54}
55
56ExternalPopupMenu::~ExternalPopupMenu()
57{
58}
59
60void ExternalPopupMenu::show(const IntRect& rect, FrameView* v, int index)
61{
62    // WebCore reuses the PopupMenu of a page.
63    // For simplicity, we do recreate the actual external popup everytime.
64    hide();
65
66    WebPopupMenuInfo info;
67    getPopupMenuInfo(&info);
68    if (info.items.isEmpty())
69        return;
70    m_webExternalPopupMenu =
71        m_webViewClient->createExternalPopupMenu(info, this);
72    m_webExternalPopupMenu->show(v->contentsToWindow(rect));
73}
74
75void ExternalPopupMenu::hide()
76{
77    if (m_popupMenuClient)
78        m_popupMenuClient->popupDidHide();
79    if (!m_webExternalPopupMenu)
80        return;
81    m_webExternalPopupMenu->close();
82    m_webExternalPopupMenu = 0;
83}
84
85void ExternalPopupMenu::updateFromElement()
86{
87}
88
89void ExternalPopupMenu::disconnectClient()
90{
91    hide();
92    m_popupMenuClient = 0;
93}
94
95void ExternalPopupMenu::didChangeSelection(int index)
96{
97    if (m_popupMenuClient)
98        m_popupMenuClient->selectionChanged(index);
99}
100
101void ExternalPopupMenu::didAcceptIndex(int index)
102{
103    // Calling methods on the PopupMenuClient might lead to this object being
104    // derefed. This ensures it does not get deleted while we are running this
105    // method.
106    RefPtr<ExternalPopupMenu> guard(this);
107
108    if (m_popupMenuClient) {
109        m_popupMenuClient->valueChanged(index);
110        // The call to valueChanged above might have lead to a call to
111        // disconnectClient, so we might not have a PopupMenuClient anymore.
112        if (m_popupMenuClient)
113            m_popupMenuClient->popupDidHide();
114    }
115    m_webExternalPopupMenu = 0;
116}
117
118void ExternalPopupMenu::didCancel()
119{
120    // See comment in didAcceptIndex on why we need this.
121    RefPtr<ExternalPopupMenu> guard(this);
122
123    if (m_popupMenuClient)
124        m_popupMenuClient->popupDidHide();
125    m_webExternalPopupMenu = 0;
126}
127
128void ExternalPopupMenu::getPopupMenuInfo(WebPopupMenuInfo* info)
129{
130    int itemCount = m_popupMenuClient->listSize();
131    WebVector<WebMenuItemInfo> items(
132        static_cast<size_t>(itemCount));
133    for (int i = 0; i < itemCount; ++i) {
134        WebMenuItemInfo& popupItem = items[i];
135        popupItem.label = m_popupMenuClient->itemText(i);
136        if (m_popupMenuClient->itemIsSeparator(i))
137            popupItem.type = WebMenuItemInfo::Separator;
138        else if (m_popupMenuClient->itemIsLabel(i))
139            popupItem.type = WebMenuItemInfo::Group;
140        else
141            popupItem.type = WebMenuItemInfo::Option;
142        popupItem.enabled = m_popupMenuClient->itemIsEnabled(i);
143        PopupMenuStyle style = m_popupMenuClient->itemStyle(i);
144        if (style.textDirection() == WebCore::RTL)
145            popupItem.textDirection = WebTextDirectionRightToLeft;
146        else
147            popupItem.textDirection = WebTextDirectionLeftToRight;
148        popupItem.hasTextDirectionOverride = style.hasTextDirectionOverride();
149    }
150
151    info->itemHeight = m_popupMenuClient->menuStyle().font().fontMetrics().height();
152    info->itemFontSize =
153        static_cast<int>(m_popupMenuClient->menuStyle().font().size());
154    info->selectedIndex = m_popupMenuClient->selectedIndex();
155    info->rightAligned =
156        m_popupMenuClient->menuStyle().textDirection() == WebCore::RTL;
157    info->items.swap(items);
158}
159
160} // namespace WebKit
161