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      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/frame/Frame.h"
     39 #include "core/frame/FrameView.h"
     40 #include "platform/PopupMenuClient.h"
     41 #include "platform/geometry/FloatQuad.h"
     42 #include "platform/geometry/IntPoint.h"
     43 #include "platform/text/TextDirection.h"
     44 #include "public/platform/WebVector.h"
     45 
     46 using namespace WebCore;
     47 
     48 namespace blink {
     49 
     50 ExternalPopupMenu::ExternalPopupMenu(Frame& frame, PopupMenuClient* popupMenuClient, WebViewClient* webViewClient)
     51     : m_popupMenuClient(popupMenuClient)
     52     , m_frameView(frame.view())
     53     , m_webViewClient(webViewClient)
     54     , m_webExternalPopupMenu(0)
     55 {
     56 }
     57 
     58 ExternalPopupMenu::~ExternalPopupMenu()
     59 {
     60 }
     61 
     62 void ExternalPopupMenu::show(const FloatQuad& controlPosition, const IntSize&, int index)
     63 {
     64     IntRect rect(controlPosition.enclosingBoundingBox());
     65     // WebCore reuses the PopupMenu of a page.
     66     // For simplicity, we do recreate the actual external popup everytime.
     67     hide();
     68 
     69     WebPopupMenuInfo info;
     70     getPopupMenuInfo(&info);
     71     if (info.items.isEmpty())
     72         return;
     73     m_webExternalPopupMenu =
     74         m_webViewClient->createExternalPopupMenu(info, this);
     75     if (m_webExternalPopupMenu)
     76         m_webExternalPopupMenu->show(m_frameView->contentsToWindow(rect));
     77     else {
     78         // The client might refuse to create a popup (when there is already one pending to be shown for example).
     79         didCancel();
     80     }
     81 }
     82 
     83 void ExternalPopupMenu::hide()
     84 {
     85     if (m_popupMenuClient)
     86         m_popupMenuClient->popupDidHide();
     87     if (!m_webExternalPopupMenu)
     88         return;
     89     m_webExternalPopupMenu->close();
     90     m_webExternalPopupMenu = 0;
     91 }
     92 
     93 void ExternalPopupMenu::updateFromElement()
     94 {
     95 }
     96 
     97 void ExternalPopupMenu::disconnectClient()
     98 {
     99     hide();
    100     m_popupMenuClient = 0;
    101 }
    102 
    103 void ExternalPopupMenu::didChangeSelection(int index)
    104 {
    105     if (m_popupMenuClient)
    106         m_popupMenuClient->selectionChanged(index);
    107 }
    108 
    109 void ExternalPopupMenu::didAcceptIndex(int index)
    110 {
    111     // Calling methods on the PopupMenuClient might lead to this object being
    112     // derefed. This ensures it does not get deleted while we are running this
    113     // method.
    114     RefPtr<ExternalPopupMenu> guard(this);
    115 
    116     if (m_popupMenuClient) {
    117         m_popupMenuClient->valueChanged(index);
    118         // The call to valueChanged above might have lead to a call to
    119         // disconnectClient, so we might not have a PopupMenuClient anymore.
    120         if (m_popupMenuClient)
    121             m_popupMenuClient->popupDidHide();
    122     }
    123     m_webExternalPopupMenu = 0;
    124 }
    125 
    126 void ExternalPopupMenu::didAcceptIndices(const WebVector<int>& indices)
    127 {
    128     if (!m_popupMenuClient) {
    129         m_webExternalPopupMenu = 0;
    130         return;
    131     }
    132 
    133     // Calling methods on the PopupMenuClient might lead to this object being
    134     // derefed. This ensures it does not get deleted while we are running this
    135     // method.
    136     RefPtr<ExternalPopupMenu> protect(this);
    137 
    138     if (!indices.size())
    139         m_popupMenuClient->valueChanged(-1, true);
    140     else {
    141         for (size_t i = 0; i < indices.size(); ++i)
    142             m_popupMenuClient->listBoxSelectItem(indices[i], (i > 0), false, (i == indices.size() - 1));
    143     }
    144 
    145     // The call to valueChanged above might have lead to a call to
    146     // disconnectClient, so we might not have a PopupMenuClient anymore.
    147     if (m_popupMenuClient)
    148         m_popupMenuClient->popupDidHide();
    149 
    150     m_webExternalPopupMenu = 0;
    151 }
    152 
    153 void ExternalPopupMenu::didCancel()
    154 {
    155     // See comment in didAcceptIndex on why we need this.
    156     RefPtr<ExternalPopupMenu> guard(this);
    157 
    158     if (m_popupMenuClient)
    159         m_popupMenuClient->popupDidHide();
    160     m_webExternalPopupMenu = 0;
    161 }
    162 
    163 void ExternalPopupMenu::getPopupMenuInfo(WebPopupMenuInfo* info)
    164 {
    165     int itemCount = m_popupMenuClient->listSize();
    166     WebVector<WebMenuItemInfo> items(static_cast<size_t>(itemCount));
    167     for (int i = 0; i < itemCount; ++i) {
    168         WebMenuItemInfo& popupItem = items[i];
    169         popupItem.label = m_popupMenuClient->itemText(i);
    170         popupItem.toolTip = m_popupMenuClient->itemToolTip(i);
    171         if (m_popupMenuClient->itemIsSeparator(i))
    172             popupItem.type = WebMenuItemInfo::Separator;
    173         else if (m_popupMenuClient->itemIsLabel(i))
    174             popupItem.type = WebMenuItemInfo::Group;
    175         else
    176             popupItem.type = WebMenuItemInfo::Option;
    177         popupItem.enabled = m_popupMenuClient->itemIsEnabled(i);
    178         popupItem.checked = m_popupMenuClient->itemIsSelected(i);
    179         PopupMenuStyle style = m_popupMenuClient->itemStyle(i);
    180         if (style.textDirection() == WebCore::RTL)
    181             popupItem.textDirection = WebTextDirectionRightToLeft;
    182         else
    183             popupItem.textDirection = WebTextDirectionLeftToRight;
    184         popupItem.hasTextDirectionOverride = style.hasTextDirectionOverride();
    185     }
    186 
    187     info->itemHeight = m_popupMenuClient->menuStyle().font().fontMetrics().height();
    188     info->itemFontSize = static_cast<int>(m_popupMenuClient->menuStyle().font().size());
    189     info->selectedIndex = m_popupMenuClient->selectedIndex();
    190     info->rightAligned = m_popupMenuClient->menuStyle().textDirection() == WebCore::RTL;
    191     info->allowMultipleSelection = m_popupMenuClient->multiple();
    192     info->items.swap(items);
    193 }
    194 
    195 }
    196