Home | History | Annotate | Download | only in web 
      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 "WebExternalPopupMenu.h"
     35 #include "WebMenuItemInfo.h"
     36 #include "WebPopupMenuInfo.h"
     37 #include "WebViewClient.h"
     38 #include "core/page/FrameView.h"
     39 #include "core/platform/PopupMenuClient.h"
     40 #include "core/platform/graphics/FloatQuad.h"
     41 #include "core/platform/graphics/IntPoint.h"
     42 #include "core/platform/text/TextDirection.h"
     43 #include "public/platform/WebVector.h"
     44 
     45 using namespace WebCore;
     46 
     47 namespace WebKit {
     48 
     49 ExternalPopupMenu::ExternalPopupMenu(Frame& frame, PopupMenuClient* popupMenuClient, WebViewClient* webViewClient)
     50     : m_popupMenuClient(popupMenuClient)
     51     , m_frameView(frame.view())
     52     , m_webViewClient(webViewClient)
     53     , m_webExternalPopupMenu(0)
     54 {
     55 }
     56 
     57 ExternalPopupMenu::~ExternalPopupMenu()
     58 {
     59 }
     60 
     61 void ExternalPopupMenu::show(const FloatQuad& controlPosition, const IntSize&, int index)
     62 {
     63     IntRect rect(controlPosition.enclosingBoundingBox());
     64     // WebCore reuses the PopupMenu of a page.
     65     // For simplicity, we do recreate the actual external popup everytime.
     66     hide();
     67 
     68     WebPopupMenuInfo info;
     69     getPopupMenuInfo(&info);
     70     if (info.items.isEmpty())
     71         return;
     72     m_webExternalPopupMenu =
     73         m_webViewClient->createExternalPopupMenu(info, this);
     74     if (m_webExternalPopupMenu)
     75         m_webExternalPopupMenu->show(m_frameView->contentsToWindow(rect));
     76     else {
     77         // The client might refuse to create a popup (when there is already one pending to be shown for example).
     78         didCancel();
     79     }
     80 }
     81 
     82 void ExternalPopupMenu::hide()
     83 {
     84     if (m_popupMenuClient)
     85         m_popupMenuClient->popupDidHide();
     86     if (!m_webExternalPopupMenu)
     87         return;
     88     m_webExternalPopupMenu->close();
     89     m_webExternalPopupMenu = 0;
     90 }
     91 
     92 void ExternalPopupMenu::updateFromElement()
     93 {
     94 }
     95 
     96 void ExternalPopupMenu::disconnectClient()
     97 {
     98     hide();
     99     m_popupMenuClient = 0;
    100 }
    101 
    102 void ExternalPopupMenu::didChangeSelection(int index)
    103 {
    104     if (m_popupMenuClient)
    105         m_popupMenuClient->selectionChanged(index);
    106 }
    107 
    108 void ExternalPopupMenu::didAcceptIndex(int index)
    109 {
    110     // Calling methods on the PopupMenuClient might lead to this object being
    111     // derefed. This ensures it does not get deleted while we are running this
    112     // method.
    113     RefPtr<ExternalPopupMenu> guard(this);
    114 
    115     if (m_popupMenuClient) {
    116         m_popupMenuClient->valueChanged(index);
    117         // The call to valueChanged above might have lead to a call to
    118         // disconnectClient, so we might not have a PopupMenuClient anymore.
    119         if (m_popupMenuClient)
    120             m_popupMenuClient->popupDidHide();
    121     }
    122     m_webExternalPopupMenu = 0;
    123 }
    124 
    125 void ExternalPopupMenu::didAcceptIndices(const WebVector<int>& indices)
    126 {
    127     if (!m_popupMenuClient) {
    128         m_webExternalPopupMenu = 0;
    129         return;
    130     }
    131 
    132     // Calling methods on the PopupMenuClient might lead to this object being
    133     // derefed. This ensures it does not get deleted while we are running this
    134     // method.
    135     RefPtr<ExternalPopupMenu> protect(this);
    136 
    137     if (!indices.size())
    138         m_popupMenuClient->valueChanged(-1, true);
    139     else {
    140         for (size_t i = 0; i < indices.size(); ++i)
    141             m_popupMenuClient->listBoxSelectItem(indices[i], (i > 0), false, (i == indices.size() - 1));
    142     }
    143 
    144     // The call to valueChanged above might have lead to a call to
    145     // disconnectClient, so we might not have a PopupMenuClient anymore.
    146     if (m_popupMenuClient)
    147         m_popupMenuClient->popupDidHide();
    148 
    149     m_webExternalPopupMenu = 0;
    150 }
    151 
    152 void ExternalPopupMenu::didCancel()
    153 {
    154     // See comment in didAcceptIndex on why we need this.
    155     RefPtr<ExternalPopupMenu> guard(this);
    156 
    157     if (m_popupMenuClient)
    158         m_popupMenuClient->popupDidHide();
    159     m_webExternalPopupMenu = 0;
    160 }
    161 
    162 void ExternalPopupMenu::getPopupMenuInfo(WebPopupMenuInfo* info)
    163 {
    164     int itemCount = m_popupMenuClient->listSize();
    165     WebVector<WebMenuItemInfo> items(static_cast<size_t>(itemCount));
    166     for (int i = 0; i < itemCount; ++i) {
    167         WebMenuItemInfo& popupItem = items[i];
    168         popupItem.label = m_popupMenuClient->itemText(i);
    169         popupItem.toolTip = m_popupMenuClient->itemToolTip(i);
    170         if (m_popupMenuClient->itemIsSeparator(i))
    171             popupItem.type = WebMenuItemInfo::Separator;
    172         else if (m_popupMenuClient->itemIsLabel(i))
    173             popupItem.type = WebMenuItemInfo::Group;
    174         else
    175             popupItem.type = WebMenuItemInfo::Option;
    176         popupItem.enabled = m_popupMenuClient->itemIsEnabled(i);
    177         popupItem.checked = m_popupMenuClient->itemIsSelected(i);
    178         PopupMenuStyle style = m_popupMenuClient->itemStyle(i);
    179         if (style.textDirection() == WebCore::RTL)
    180             popupItem.textDirection = WebTextDirectionRightToLeft;
    181         else
    182             popupItem.textDirection = WebTextDirectionLeftToRight;
    183         popupItem.hasTextDirectionOverride = style.hasTextDirectionOverride();
    184     }
    185 
    186     info->itemHeight = m_popupMenuClient->menuStyle().font().fontMetrics().height();
    187     info->itemFontSize = static_cast<int>(m_popupMenuClient->menuStyle().font().size());
    188     info->selectedIndex = m_popupMenuClient->selectedIndex();
    189     info->rightAligned = m_popupMenuClient->menuStyle().textDirection() == WebCore::RTL;
    190     info->allowMultipleSelection = m_popupMenuClient->multiple();
    191     info->items.swap(items);
    192 }
    193 
    194 }
    195