Home | History | Annotate | Download | only in src 
      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 
     44 using namespace WebCore;
     45 
     46 namespace WebKit {
     47 
     48 ExternalPopupMenu::ExternalPopupMenu(PopupMenuClient* popupMenuClient,
     49                                      WebViewClient* webViewClient)
     50     : m_popupMenuClient(popupMenuClient)
     51     , m_webViewClient(webViewClient)
     52     , m_webExternalPopupMenu(0)
     53 {
     54 }
     55 
     56 ExternalPopupMenu::~ExternalPopupMenu()
     57 {
     58 }
     59 
     60 void 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 
     75 void 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 
     85 void ExternalPopupMenu::updateFromElement()
     86 {
     87 }
     88 
     89 void ExternalPopupMenu::disconnectClient()
     90 {
     91     hide();
     92     m_popupMenuClient = 0;
     93 }
     94 
     95 void ExternalPopupMenu::didChangeSelection(int index)
     96 {
     97     if (m_popupMenuClient)
     98         m_popupMenuClient->selectionChanged(index);
     99 }
    100 
    101 void 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 
    118 void 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 
    128 void 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