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      1 /*
      2  * Copyright (C) 2006, 2008 Apple 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
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "TextControlInnerElements.h"
     28 
     29 #include "BeforeTextInsertedEvent.h"
     30 #include "Document.h"
     31 #include "EventHandler.h"
     32 #include "EventNames.h"
     33 #include "Frame.h"
     34 #include "HTMLInputElement.h"
     35 #include "HTMLNames.h"
     36 #include "HTMLTextAreaElement.h"
     37 #include "MouseEvent.h"
     38 #include "RenderLayer.h"
     39 #include "RenderTextControlSingleLine.h"
     40 
     41 namespace WebCore {
     42 
     43 class RenderTextControlInnerBlock : public RenderBlock {
     44 public:
     45     RenderTextControlInnerBlock(Node* node, bool isMultiLine) : RenderBlock(node), m_multiLine(isMultiLine) { }
     46 
     47     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
     48     virtual VisiblePosition positionForPoint(const IntPoint&);
     49     private:
     50         bool m_multiLine;
     51 };
     52 
     53 bool RenderTextControlInnerBlock::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction hitTestAction)
     54 {
     55     RenderObject* renderer = node()->shadowAncestorNode()->renderer();
     56 
     57     bool placeholderIsVisible = false;
     58     if (renderer->isTextField())
     59         placeholderIsVisible = toRenderTextControlSingleLine(renderer)->placeholderIsVisible();
     60 
     61     return RenderBlock::nodeAtPoint(request, result, x, y, tx, ty, placeholderIsVisible ? HitTestBlockBackground : hitTestAction);
     62 }
     63 
     64 VisiblePosition RenderTextControlInnerBlock::positionForPoint(const IntPoint& point)
     65 {
     66     int contentsX = point.x();
     67     int contentsY = point.y();
     68 
     69     // Multiline text controls have the scroll on shadowAncestorNode, so we need to take that
     70     // into account here.
     71     if (m_multiLine) {
     72         RenderTextControl* renderer = toRenderTextControl(node()->shadowAncestorNode()->renderer());
     73         if (renderer->hasOverflowClip())
     74             renderer->layer()->addScrolledContentOffset(contentsX, contentsY);
     75     }
     76 
     77     return RenderBlock::positionForPoint(IntPoint(contentsX, contentsY));
     78 }
     79 
     80 TextControlInnerElement::TextControlInnerElement(Document* doc, Node* shadowParent)
     81     : HTMLDivElement(HTMLNames::divTag, doc)
     82     , m_shadowParent(shadowParent)
     83 {
     84 }
     85 
     86 void TextControlInnerElement::attachInnerElement(Node* parent, PassRefPtr<RenderStyle> style, RenderArena* arena)
     87 {
     88     // When adding these elements, create the renderer & style first before adding to the DOM.
     89     // Otherwise, the render tree will create some anonymous blocks that will mess up our layout.
     90 
     91     // Create the renderer with the specified style
     92     RenderObject* renderer = createRenderer(arena, style.get());
     93     if (renderer) {
     94         setRenderer(renderer);
     95         renderer->setStyle(style);
     96     }
     97 
     98     // Set these explicitly since this normally happens during an attach()
     99     setAttached();
    100     setInDocument(true);
    101 
    102     // For elements without a shadow parent, add the node to the DOM normally.
    103     if (!m_shadowParent)
    104         parent->addChild(this);
    105 
    106     // Add the renderer to the render tree
    107     if (renderer)
    108         parent->renderer()->addChild(renderer);
    109 }
    110 
    111 TextControlInnerTextElement::TextControlInnerTextElement(Document* doc, Node* shadowParent)
    112     : TextControlInnerElement(doc, shadowParent)
    113 {
    114 }
    115 
    116 void TextControlInnerTextElement::defaultEventHandler(Event* evt)
    117 {
    118     // FIXME: In the future, we should add a way to have default event listeners.  Then we would add one to the text field's inner div, and we wouldn't need this subclass.
    119     Node* shadowAncestor = shadowAncestorNode();
    120     if (shadowAncestor && shadowAncestor->renderer()) {
    121         ASSERT(shadowAncestor->renderer()->isTextControl());
    122         if (evt->isBeforeTextInsertedEvent()) {
    123             if (shadowAncestor->renderer()->isTextField())
    124                 static_cast<HTMLInputElement*>(shadowAncestor)->defaultEventHandler(evt);
    125             else
    126                 static_cast<HTMLTextAreaElement*>(shadowAncestor)->defaultEventHandler(evt);
    127         }
    128         if (evt->type() == eventNames().webkitEditableContentChangedEvent)
    129             toRenderTextControl(shadowAncestor->renderer())->subtreeHasChanged();
    130     }
    131     if (!evt->defaultHandled())
    132         HTMLDivElement::defaultEventHandler(evt);
    133 }
    134 
    135 RenderObject* TextControlInnerTextElement::createRenderer(RenderArena* arena, RenderStyle*)
    136 {
    137     bool multiLine = false;
    138     Node* shadowAncestor = shadowAncestorNode();
    139     if (shadowAncestor && shadowAncestor->renderer()) {
    140         ASSERT(shadowAncestor->renderer()->isTextField() || shadowAncestor->renderer()->isTextArea());
    141         multiLine = shadowAncestor->renderer()->isTextArea();
    142     }
    143     return new (arena) RenderTextControlInnerBlock(this, multiLine);
    144 }
    145 
    146 SearchFieldResultsButtonElement::SearchFieldResultsButtonElement(Document* doc)
    147     : TextControlInnerElement(doc)
    148 {
    149 }
    150 
    151 void SearchFieldResultsButtonElement::defaultEventHandler(Event* evt)
    152 {
    153     // On mousedown, bring up a menu, if needed
    154     HTMLInputElement* input = static_cast<HTMLInputElement*>(shadowAncestorNode());
    155     if (evt->type() == eventNames().mousedownEvent && evt->isMouseEvent() && static_cast<MouseEvent*>(evt)->button() == LeftButton) {
    156         input->focus();
    157         input->select();
    158         RenderTextControlSingleLine* renderer = toRenderTextControlSingleLine(input->renderer());
    159         if (renderer->popupIsVisible())
    160             renderer->hidePopup();
    161         else if (input->maxResults() > 0)
    162             renderer->showPopup();
    163         evt->setDefaultHandled();
    164     }
    165     if (!evt->defaultHandled())
    166         HTMLDivElement::defaultEventHandler(evt);
    167 }
    168 
    169 SearchFieldCancelButtonElement::SearchFieldCancelButtonElement(Document* doc)
    170     : TextControlInnerElement(doc)
    171     , m_capturing(false)
    172 {
    173 }
    174 
    175 void SearchFieldCancelButtonElement::detach()
    176 {
    177     if (m_capturing) {
    178         if (Frame* frame = document()->frame())
    179             frame->eventHandler()->setCapturingMouseEventsNode(0);
    180     }
    181     TextControlInnerElement::detach();
    182 }
    183 
    184 
    185 void SearchFieldCancelButtonElement::defaultEventHandler(Event* evt)
    186 {
    187     // If the element is visible, on mouseup, clear the value, and set selection
    188     HTMLInputElement* input = static_cast<HTMLInputElement*>(shadowAncestorNode());
    189     if (evt->type() == eventNames().mousedownEvent && evt->isMouseEvent() && static_cast<MouseEvent*>(evt)->button() == LeftButton) {
    190         input->focus();
    191         input->select();
    192         evt->setDefaultHandled();
    193         if (renderer() && renderer()->visibleToHitTesting())
    194             if (Frame* frame = document()->frame()) {
    195                 frame->eventHandler()->setCapturingMouseEventsNode(this);
    196                 m_capturing = true;
    197             }
    198     } else if (evt->type() == eventNames().mouseupEvent && evt->isMouseEvent() && static_cast<MouseEvent*>(evt)->button() == LeftButton) {
    199         if (m_capturing && renderer() && renderer()->visibleToHitTesting()) {
    200             if (hovered()) {
    201                 input->setValue("");
    202                 input->onSearch();
    203                 evt->setDefaultHandled();
    204             }
    205             if (Frame* frame = document()->frame()) {
    206                 frame->eventHandler()->setCapturingMouseEventsNode(0);
    207                 m_capturing = false;
    208             }
    209         }
    210     }
    211     if (!evt->defaultHandled())
    212         HTMLDivElement::defaultEventHandler(evt);
    213 }
    214 
    215 }
    216