RenderTextControlMultiLine.cpp   [plain text]

/**
 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
 *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"
#include "RenderTextControlMultiLine.h"

#include "Frame.h"
#include "HTMLNames.h"
#include "HTMLTextAreaElement.h"
#include "HitTestResult.h"
#include "ShadowRoot.h"
#include "StyleInheritedData.h"
#include "TextControlInnerElements.h"

namespace WebCore {

RenderTextControlMultiLine::RenderTextControlMultiLine(HTMLTextAreaElement& element, Ref<RenderStyle>&& style)
    : RenderTextControl(element, WTF::move(style))
{
}

RenderTextControlMultiLine::~RenderTextControlMultiLine()
{
    if (textAreaElement().inDocument())
        textAreaElement().rendererWillBeDestroyed();
}

HTMLTextAreaElement& RenderTextControlMultiLine::textAreaElement() const
{
    return downcast<HTMLTextAreaElement>(RenderTextControl::textFormControlElement());
}

bool RenderTextControlMultiLine::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction)
{
    if (!RenderTextControl::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, hitTestAction))
        return false;

    if (result.innerNode() == &textAreaElement() || result.innerNode() == innerTextElement())
        hitInnerTextElement(result, locationInContainer.point(), accumulatedOffset);

    return true;
}

float RenderTextControlMultiLine::getAverageCharWidth()
{
#if !PLATFORM(IOS)
    // Since Lucida Grande is the default font, we want this to match the width
    // of Courier New, the default font for textareas in IE, Firefox and Safari Win.
    // 1229 is the avgCharWidth value in the OS/2 table for Courier New.
    if (style().fontCascade().firstFamily() == "Lucida Grande")
        return scaleEmToUnits(1229);
#endif

    return RenderTextControl::getAverageCharWidth();
}

LayoutUnit RenderTextControlMultiLine::preferredContentLogicalWidth(float charWidth) const
{
    return ceilf(charWidth * textAreaElement().cols()) + scrollbarThickness();
}

LayoutUnit RenderTextControlMultiLine::computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const
{
    return lineHeight * textAreaElement().rows() + nonContentHeight;
}

int RenderTextControlMultiLine::baselinePosition(FontBaseline baselineType, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
{
    return RenderBox::baselinePosition(baselineType, firstLine, direction, linePositionMode);
}

Ref<RenderStyle> RenderTextControlMultiLine::createInnerTextStyle(const RenderStyle* startStyle) const
{
    auto textBlockStyle = RenderStyle::create();
    textBlockStyle.get().inheritFrom(startStyle);
    adjustInnerTextStyle(startStyle, textBlockStyle.get());
    textBlockStyle.get().setDisplay(BLOCK);

#if PLATFORM(IOS)
    // We're adding three extra pixels of padding to line textareas up with text fields.  
    textBlockStyle.get().setPaddingLeft(Length(3, Fixed));
    textBlockStyle.get().setPaddingRight(Length(3, Fixed));
#endif

    return textBlockStyle;
}

RenderObject* RenderTextControlMultiLine::layoutSpecialExcludedChild(bool relayoutChildren)
{
    RenderObject* placeholderRenderer = RenderTextControl::layoutSpecialExcludedChild(relayoutChildren);
    if (is<RenderBox>(placeholderRenderer)) {
        auto& placeholderBox = downcast<RenderBox>(*placeholderRenderer);
        placeholderBox.style().setLogicalWidth(Length(contentLogicalWidth() - placeholderBox.borderAndPaddingLogicalWidth(), Fixed));
        placeholderBox.layoutIfNeeded();
        placeholderBox.setX(borderLeft() + paddingLeft());
        placeholderBox.setY(borderTop() + paddingTop());
    }
    return placeholderRenderer;
}
    
}