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 "web/ExternalPopupMenu.h"
     33 
     34 #include "core/frame/FrameView.h"
     35 #include "core/frame/LocalFrame.h"
     36 #include "platform/PopupMenuClient.h"
     37 #include "platform/geometry/FloatQuad.h"
     38 #include "platform/geometry/IntPoint.h"
     39 #include "platform/text/TextDirection.h"
     40 #include "public/platform/WebVector.h"
     41 #include "public/web/WebExternalPopupMenu.h"
     42 #include "public/web/WebMenuItemInfo.h"
     43 #include "public/web/WebPopupMenuInfo.h"
     44 #include "public/web/WebViewClient.h"
     45 #include "web/WebViewImpl.h"
     46 
     47 using namespace WebCore;
     48 
     49 namespace blink {
     50 
     51 ExternalPopupMenu::ExternalPopupMenu(LocalFrame& frame, PopupMenuClient* popupMenuClient, WebViewImpl& webView)
     52     : m_popupMenuClient(popupMenuClient)
     53     , m_frameView(frame.view())
     54     , m_webView(webView)
     55     , m_dispatchEventTimer(this, &ExternalPopupMenu::dispatchEvent)
     56     , m_webExternalPopupMenu(0)
     57 {
     58 }
     59 
     60 ExternalPopupMenu::~ExternalPopupMenu()
     61 {
     62 }
     63 
     64 void ExternalPopupMenu::show(const FloatQuad& controlPosition, const IntSize&, int index)
     65 {
     66     IntRect rect(controlPosition.enclosingBoundingBox());
     67     // WebCore reuses the PopupMenu of an element.
     68     // For simplicity, we do recreate the actual external popup everytime.
     69     if (m_webExternalPopupMenu) {
     70         m_webExternalPopupMenu->close();
     71         m_webExternalPopupMenu = 0;
     72     }
     73 
     74     WebPopupMenuInfo info;
     75     getPopupMenuInfo(&info);
     76     if (info.items.isEmpty())
     77         return;
     78     m_webExternalPopupMenu = m_webView.client()->createExternalPopupMenu(info, this);
     79     if (m_webExternalPopupMenu) {
     80         m_webExternalPopupMenu->show(m_frameView->contentsToWindow(rect));
     81 #if OS(MACOSX)
     82         const WebInputEvent* currentEvent = WebViewImpl::currentInputEvent();
     83         if (currentEvent && currentEvent->type == WebInputEvent::MouseDown) {
     84             m_syntheticEvent = adoptPtr(new WebMouseEvent);
     85             *m_syntheticEvent = *static_cast<const WebMouseEvent*>(currentEvent);
     86             m_syntheticEvent->type = WebInputEvent::MouseUp;
     87             m_dispatchEventTimer.startOneShot(0, FROM_HERE);
     88             // FIXME: show() is asynchronous. If preparing a popup is slow and
     89             // a user released the mouse button before showing the popup,
     90             // mouseup and click events are correctly dispatched. Dispatching
     91             // the synthetic mouseup event is redundant in this case.
     92         }
     93 #endif
     94     } else {
     95         // The client might refuse to create a popup (when there is already one pending to be shown for example).
     96         didCancel();
     97     }
     98 }
     99 
    100 void ExternalPopupMenu::dispatchEvent(Timer<ExternalPopupMenu>*)
    101 {
    102     m_webView.handleInputEvent(*m_syntheticEvent);
    103     m_syntheticEvent.clear();
    104 }
    105 
    106 void ExternalPopupMenu::hide()
    107 {
    108     if (m_popupMenuClient)
    109         m_popupMenuClient->popupDidHide();
    110     if (!m_webExternalPopupMenu)
    111         return;
    112     m_webExternalPopupMenu->close();
    113     m_webExternalPopupMenu = 0;
    114 }
    115 
    116 void ExternalPopupMenu::updateFromElement()
    117 {
    118 }
    119 
    120 void ExternalPopupMenu::disconnectClient()
    121 {
    122     hide();
    123     m_popupMenuClient = 0;
    124 }
    125 
    126 void ExternalPopupMenu::didChangeSelection(int index)
    127 {
    128     if (m_popupMenuClient)
    129         m_popupMenuClient->selectionChanged(index);
    130 }
    131 
    132 void ExternalPopupMenu::didAcceptIndex(int index)
    133 {
    134     // Calling methods on the PopupMenuClient might lead to this object being
    135     // derefed. This ensures it does not get deleted while we are running this
    136     // method.
    137     RefPtr<ExternalPopupMenu> guard(this);
    138 
    139     if (m_popupMenuClient) {
    140         m_popupMenuClient->popupDidHide();
    141         m_popupMenuClient->valueChanged(index);
    142     }
    143     m_webExternalPopupMenu = 0;
    144 }
    145 
    146 void ExternalPopupMenu::didAcceptIndices(const WebVector<int>& indices)
    147 {
    148     if (!m_popupMenuClient) {
    149         m_webExternalPopupMenu = 0;
    150         return;
    151     }
    152 
    153     // Calling methods on the PopupMenuClient might lead to this object being
    154     // derefed. This ensures it does not get deleted while we are running this
    155     // method.
    156     RefPtr<ExternalPopupMenu> protect(this);
    157 
    158     if (!indices.size())
    159         m_popupMenuClient->valueChanged(-1, true);
    160     else {
    161         for (size_t i = 0; i < indices.size(); ++i)
    162             m_popupMenuClient->listBoxSelectItem(indices[i], (i > 0), false, (i == indices.size() - 1));
    163     }
    164 
    165     // The call to valueChanged above might have lead to a call to
    166     // disconnectClient, so we might not have a PopupMenuClient anymore.
    167     if (m_popupMenuClient)
    168         m_popupMenuClient->popupDidHide();
    169 
    170     m_webExternalPopupMenu = 0;
    171 }
    172 
    173 void ExternalPopupMenu::didCancel()
    174 {
    175     // See comment in didAcceptIndex on why we need this.
    176     RefPtr<ExternalPopupMenu> guard(this);
    177 
    178     if (m_popupMenuClient)
    179         m_popupMenuClient->popupDidHide();
    180     m_webExternalPopupMenu = 0;
    181 }
    182 
    183 void ExternalPopupMenu::getPopupMenuInfo(WebPopupMenuInfo* info)
    184 {
    185     int itemCount = m_popupMenuClient->listSize();
    186     WebVector<WebMenuItemInfo> items(static_cast<size_t>(itemCount));
    187     for (int i = 0; i < itemCount; ++i) {
    188         WebMenuItemInfo& popupItem = items[i];
    189         popupItem.label = m_popupMenuClient->itemText(i);
    190         popupItem.toolTip = m_popupMenuClient->itemToolTip(i);
    191         if (m_popupMenuClient->itemIsSeparator(i))
    192             popupItem.type = WebMenuItemInfo::Separator;
    193         else if (m_popupMenuClient->itemIsLabel(i))
    194             popupItem.type = WebMenuItemInfo::Group;
    195         else
    196             popupItem.type = WebMenuItemInfo::Option;
    197         popupItem.enabled = m_popupMenuClient->itemIsEnabled(i);
    198         popupItem.checked = m_popupMenuClient->itemIsSelected(i);
    199         PopupMenuStyle style = m_popupMenuClient->itemStyle(i);
    200         if (style.textDirection() == WebCore::RTL)
    201             popupItem.textDirection = WebTextDirectionRightToLeft;
    202         else
    203             popupItem.textDirection = WebTextDirectionLeftToRight;
    204         popupItem.hasTextDirectionOverride = style.hasTextDirectionOverride();
    205     }
    206 
    207     info->itemHeight = m_popupMenuClient->menuStyle().font().fontMetrics().height();
    208     info->itemFontSize = static_cast<int>(m_popupMenuClient->menuStyle().font().fontDescription().computedSize());
    209     info->selectedIndex = m_popupMenuClient->selectedIndex();
    210     info->rightAligned = m_popupMenuClient->menuStyle().textDirection() == WebCore::RTL;
    211     info->allowMultipleSelection = m_popupMenuClient->multiple();
    212     info->items.swap(items);
    213 }
    214 
    215 }
    216