Implement HTMLMarqueeElement's animation in private scripts

Source/core/rendering/RenderMarquee.cpp

Index: Source/core/rendering/RenderMarquee.cpp
diff --git a/Source/core/rendering/RenderMarquee.cpp b/Source/core/rendering/RenderMarquee.cpp
deleted file mode 100644
index 4608ed2282ae345628513acebdd457c6c6523a5a..0000000000000000000000000000000000000000
--- a/Source/core/rendering/RenderMarquee.cpp
+++ /dev/null
@@ -1,327 +0,0 @@
-/*
- * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
- * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
- *
- * Portions are Copyright (C) 1998 Netscape Communications Corporation.
- *
- * Other contributors:
- *   Robert O'Callahan <roc+@cs.cmu.edu>
- *   David Baron <dbaron@fas.harvard.edu>
- *   Christian Biesinger <cbiesinger@web.de>
- *   Randall Jesup <rjesup@wgate.com>
- *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
- *   Josh Soref <timeless@mac.com>
- *   Boris Zbarsky <bzbarsky@mit.edu>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Alternatively, the contents of this file may be used under the terms
- * of either the Mozilla Public License Version 1.1, found at
- * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
- * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
- * (the "GPL"), in which case the provisions of the MPL or the GPL are
- * applicable instead of those above.  If you wish to allow use of your
- * version of this file only under the terms of one of those two
- * licenses (the MPL or the GPL) and not to allow others to use your
- * version of this file under the LGPL, indicate your decision by
- * deletingthe provisions above and replace them with the notice and
- * other provisions required by the MPL or the GPL, as the case may be.
- * If you do not delete the provisions above, a recipient may use your
- * version of this file under any of the LGPL, the MPL or the GPL.
- */
-
-#include "config.h"
-
-#include "core/rendering/RenderMarquee.h"
-
-#include "core/HTMLNames.h"
-#include "core/html/HTMLMarqueeElement.h"
-#include "core/frame/FrameView.h"
-#include "core/frame/UseCounter.h"
-#include "core/rendering/RenderLayer.h"
-#include "core/rendering/RenderView.h"
-#include "platform/LengthFunctions.h"
-
-namespace blink {
-
-using namespace HTMLNames;
-
-RenderMarquee::RenderMarquee(HTMLMarqueeElement* element)
-    : RenderBlockFlow(element)
-    , m_currentLoop(0)
-    , m_totalLoops(0)
-    , m_timer(element, &HTMLMarqueeElement::timerFired)
-    , m_start(0)
-    , m_end(0)
-    , m_speed(0)
-    , m_reset(false)
-    , m_suspended(false)
-    , m_stopped(false)
-    , m_direction(MAUTO)
-{
-    UseCounter::count(document(), UseCounter::HTMLMarqueeElement);
-}
-
-RenderMarquee::~RenderMarquee()
-{
-}
-
-int RenderMarquee::marqueeSpeed() const
-{
-    int result = style()->marqueeSpeed();
-    if (Node* node = this->node())
-        result = std::max(result, toHTMLMarqueeElement(node)->minimumDelay());
-    return result;
-}
-
-EMarqueeDirection RenderMarquee::direction() const
-{
-    // FIXME: Support the CSS3 "auto" value for determining the direction of the marquee.
-    // For now just map MAUTO to MBACKWARD
-    EMarqueeDirection result = style()->marqueeDirection();
-    TextDirection dir = style()->direction();
-    if (result == MAUTO)
-        result = MBACKWARD;
-    if (result == MFORWARD)
-        result = (dir == LTR) ? MRIGHT : MLEFT;
-    if (result == MBACKWARD)
-        result = (dir == LTR) ? MLEFT : MRIGHT;
-
-    // Now we have the real direction.  Next we check to see if the increment is negative.
-    // If so, then we reverse the direction.
-    Length increment = style()->marqueeIncrement();
-    if (increment.isNegative())
-        result = static_cast<EMarqueeDirection>(-result);
-
-    return result;
-}
-
-bool RenderMarquee::isHorizontal() const
-{
-    return direction() == MLEFT || direction() == MRIGHT;
-}
-
-int RenderMarquee::computePosition(EMarqueeDirection dir, bool stopAtContentEdge)
-{
-    if (isHorizontal()) {
-        bool ltr = style()->isLeftToRightDirection();
-        LayoutUnit clientWidth = this->clientWidth();
-        LayoutUnit contentWidth = ltr ? maxPreferredLogicalWidth() : minPreferredLogicalWidth();
-        if (ltr)
-            contentWidth += (paddingRight() - borderLeft());
-        else {
-            contentWidth = width() - contentWidth;
-            contentWidth += (paddingLeft() - borderRight());
-        }
-        if (dir == MRIGHT) {
-            if (stopAtContentEdge)
-                return std::max<LayoutUnit>(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
-            else
-                return ltr ? contentWidth : clientWidth;
-        }
-        else {
-            if (stopAtContentEdge)
-                return std::min<LayoutUnit>(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
-            else
-                return ltr ? -clientWidth : -contentWidth;
-        }
-    }
-    else {
-        int contentHeight = layoutOverflowRect().maxY() - borderTop() + paddingBottom();
-        int clientHeight = this->clientHeight();
-        if (dir == MUP) {
-            if (stopAtContentEdge)
-                return std::min(contentHeight - clientHeight, 0);
-            else
-                return -clientHeight;
-        }
-        else {
-            if (stopAtContentEdge)
-                return std::max(contentHeight - clientHeight, 0);
-            else
-                return contentHeight;
-        }
-    }
-}
-
-void RenderMarquee::start()
-{
-    if (m_timer.isActive() || style()->marqueeIncrement().isZero())
-        return;
-
-    if (!m_suspended && !m_stopped) {
-        if (isHorizontal())
-            layer()->scrollableArea()->scrollToOffset(IntSize(m_start, 0));
-        else
-            layer()->scrollableArea()->scrollToOffset(IntSize(0, m_start));
-    } else {
-        m_suspended = false;
-        m_stopped = false;
-    }
-
-    m_timer.startRepeating(speed() * 0.001, FROM_HERE);
-}
-
-void RenderMarquee::suspend()
-{
-    m_timer.stop();
-    m_suspended = true;
-}
-
-void RenderMarquee::stop()
-{
-    m_timer.stop();
-    m_stopped = true;
-}
-
-void RenderMarquee::updateMarqueePosition()
-{
-    bool activate = (m_totalLoops <= 0 || m_currentLoop < m_totalLoops);
-    if (activate) {
-        EMarqueeBehavior behavior = style()->marqueeBehavior();
-        m_start = computePosition(direction(), behavior == MALTERNATE);
-        m_end = computePosition(reverseDirection(), behavior == MALTERNATE || behavior == MSLIDE);
-        if (!m_stopped) {
-            // Hits in compositing/overflow/do-not-repaint-if-scrolling-composited-layers.html during layout.
-            DisableCompositingQueryAsserts disabler;
-            start();
-        }
-    }
-}
-
-const char* RenderMarquee::renderName() const
-{
-    if (isFloating())
-        return "RenderMarquee (floating)";
-    if (isOutOfFlowPositioned())
-        return "RenderMarquee (positioned)";
-    if (isAnonymous())
-        return "RenderMarquee (generated)";
-    if (isRelPositioned())
-        return "RenderMarquee (relative positioned)";
-    return "RenderMarquee";
-
-}
-
-void RenderMarquee::styleDidChange(StyleDifference difference, const RenderStyle* oldStyle)
-{
-    RenderBlockFlow::styleDidChange(difference, oldStyle);
-
-    RenderStyle* s = style();
-
-    if (m_direction != s->marqueeDirection() || (m_totalLoops != s->marqueeLoopCount() && m_currentLoop >= m_totalLoops))
-        m_currentLoop = 0; // When direction changes or our loopCount is a smaller number than our current loop, reset our loop.
-
-    m_totalLoops = s->marqueeLoopCount();
-    m_direction = s->marqueeDirection();
-
-    // Hack for WinIE. In WinIE, a value of 0 or lower for the loop count for SLIDE means to only do
-    // one loop.
-    if (m_totalLoops <= 0 && s->marqueeBehavior() == MSLIDE)
-        m_totalLoops = 1;
-
-    // Hack alert: Set the white-space value to nowrap for horizontal marquees with inline children, thus ensuring
-    // all the text ends up on one line by default. Limit this hack to the <marquee> element to emulate
-    // WinIE's behavior. Someone using CSS3 can use white-space: nowrap on their own to get this effect.
-    // Second hack alert: Set the text-align back to auto. WinIE completely ignores text-align on the
-    // marquee element.
-    // FIXME: Bring these up with the CSS WG.
-    if (isHorizontal() && childrenInline()) {
-        s->setWhiteSpace(NOWRAP);
-        s->setTextAlign(TASTART);
-    }
-
-    // Legacy hack - multiple browsers default vertical marquees to 200px tall.
-    if (!isHorizontal() && s->height().isAuto())
-        s->setHeight(Length(200, Fixed));
-
-    if (speed() != marqueeSpeed()) {
-        m_speed = marqueeSpeed();
-        if (m_timer.isActive())
-            m_timer.startRepeating(speed() * 0.001, FROM_HERE);
-    }
-
-    // Check the loop count to see if we should now stop.
-    bool activate = (m_totalLoops <= 0 || m_currentLoop < m_totalLoops);
-    if (activate && !m_timer.isActive())
-        setNeedsLayoutAndFullPaintInvalidation();
-    else if (!activate && m_timer.isActive())
-        m_timer.stop();
-}
-
-void RenderMarquee::layoutBlock(bool relayoutChildren)
-{
-    RenderBlockFlow::layoutBlock(relayoutChildren);
-
-    updateMarqueePosition();
-}
-
-void RenderMarquee::timerFired()
-{
-    // FIXME: Why do we need to check the view and not just the RenderMarquee itself?
-    if (view()->needsLayout())
-        return;
-
-    if (m_reset) {
-        m_reset = false;
-        if (isHorizontal())
-            layer()->scrollableArea()->scrollToXOffset(m_start);
-        else
-            layer()->scrollableArea()->scrollToYOffset(m_start);
-        return;
-    }
-
-    RenderStyle* s = style();
-
-    int endPoint = m_end;
-    int range = m_end - m_start;
-    int newPos;
-    if (range == 0)
-        newPos = m_end;
-    else {
-        bool addIncrement = direction() == MUP || direction() == MLEFT;
-        bool isReversed = s->marqueeBehavior() == MALTERNATE && m_currentLoop % 2;
-        if (isReversed) {
-            // We're going in the reverse direction.
-            endPoint = m_start;
-            range = -range;
-            addIncrement = !addIncrement;
-        }
-        bool positive = range > 0;
-        int clientSize = (isHorizontal() ? clientWidth() : clientHeight());
-        int increment = abs(intValueForLength(style()->marqueeIncrement(), clientSize));
-        int currentPos = (isHorizontal() ? layer()->scrollableArea()->scrollXOffset() : layer()->scrollableArea()->scrollYOffset());
-        newPos =  currentPos + (addIncrement ? increment : -increment);
-        if (positive)
-            newPos = std::min(newPos, endPoint);
-        else
-            newPos = std::max(newPos, endPoint);
-    }
-
-    if (newPos == endPoint) {
-        m_currentLoop++;
-        if (m_totalLoops > 0 && m_currentLoop >= m_totalLoops)
-            m_timer.stop();
-        else if (s->marqueeBehavior() != MALTERNATE)
-            m_reset = true;
-    }
-
-    if (isHorizontal())
-        layer()->scrollableArea()->scrollToXOffset(newPos);
-    else
-        layer()->scrollableArea()->scrollToYOffset(newPos);
-}
-
-} // namespace blink