Move and rename RenderFrame and RenderFrameSet.

Source/core/rendering/RenderFrameSet.cpp

-/**
- * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
- *           (C) 2000 Simon Hausmann <hausmann@kde.org>
- *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
- * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
- *
- * 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 "core/rendering/RenderFrameSet.h"
-
-#include "core/dom/Document.h"
-#include "core/events/MouseEvent.h"
-#include "core/frame/LocalFrame.h"
-#include "core/html/HTMLDimension.h"
-#include "core/html/HTMLFrameSetElement.h"
-#include "core/layout/PaintInfo.h"
-#include "core/page/EventHandler.h"
-#include "core/paint/FrameSetPainter.h"
-#include "core/rendering/RenderFrame.h"
-#include "core/rendering/RenderView.h"
-#include "platform/Cursor.h"
-#include "platform/graphics/GraphicsContext.h"
-
-namespace blink {
-
-RenderFrameSet::RenderFrameSet(HTMLFrameSetElement* frameSet)
-    : RenderBox(frameSet)
-    , m_isResizing(false)
-    , m_isChildResizing(false)
-{
-    setInline(false);
-}
-
-RenderFrameSet::~RenderFrameSet()
-{
-}
-
-RenderFrameSet::GridAxis::GridAxis()
-    : m_splitBeingResized(noSplit)
-{
-}
-
-HTMLFrameSetElement* RenderFrameSet::frameSet() const
-{
-    return toHTMLFrameSetElement(node());
-}
-
-void RenderFrameSet::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
-{
-    FrameSetPainter(*this).paint(paintInfo, paintOffset);
-}
-
-void RenderFrameSet::computePreferredLogicalWidths()
-{
-    m_minPreferredLogicalWidth = 0;
-    m_maxPreferredLogicalWidth = 0;
-    clearPreferredLogicalWidthsDirty();
-}
-
-void RenderFrameSet::GridAxis::resize(int size)
-{
-    m_sizes.resize(size);
-    m_deltas.resize(size);
-    m_deltas.fill(0);
-
-    // To track edges for resizability and borders, we need to be (size + 1). This is because a parent frameset
-    // may ask us for information about our left/top/right/bottom edges in order to make its own decisions about
-    // what to do. We are capable of tainting that parent frameset's borders, so we have to cache this info.
-    m_preventResize.resize(size + 1);
-    m_allowBorder.resize(size + 1);
-}
-
-void RenderFrameSet::layOutAxis(GridAxis& axis, const Vector<HTMLDimension>& grid, int availableLen)
-{
-    availableLen = max(availableLen, 0);
-
-    int* gridLayout = axis.m_sizes.data();
-
-    if (grid.isEmpty()) {
-        gridLayout[0] = availableLen;
-        return;
-    }
-
-    int gridLen = axis.m_sizes.size();
-    ASSERT(gridLen);
-
-    int totalRelative = 0;
-    int totalFixed = 0;
-    int totalPercent = 0;
-    int countRelative = 0;
-    int countFixed = 0;
-    int countPercent = 0;
-
-    // First we need to investigate how many columns of each type we have and
-    // how much space these columns are going to require.
-    for (int i = 0; i < gridLen; ++i) {
-        // Count the total length of all of the fixed columns/rows -> totalFixed
-        // Count the number of columns/rows which are fixed -> countFixed
-        if (grid[i].isAbsolute()) {
-            gridLayout[i] = max<int>(grid[i].value(), 0);
-            totalFixed += gridLayout[i];
-            countFixed++;
-        }
-
-        // Count the total percentage of all of the percentage columns/rows -> totalPercent
-        // Count the number of columns/rows which are percentages -> countPercent
-        if (grid[i].isPercentage()) {
-            gridLayout[i] = max<int>(grid[i].value() * availableLen / 100., 0);
-            totalPercent += gridLayout[i];
-            countPercent++;
-        }
-
-        // Count the total relative of all the relative columns/rows -> totalRelative
-        // Count the number of columns/rows which are relative -> countRelative
-        if (grid[i].isRelative()) {
-            totalRelative += max<int>(grid[i].value(), 1);
-            countRelative++;
-        }
-    }
-
-    int remainingLen = availableLen;
-
-    // Fixed columns/rows are our first priority. If there is not enough space to fit all fixed
-    // columns/rows we need to proportionally adjust their size.
-    if (totalFixed > remainingLen) {
-        int remainingFixed = remainingLen;
-
-        for (int i = 0; i < gridLen; ++i) {
-            if (grid[i].isAbsolute()) {
-                gridLayout[i] = (gridLayout[i] * remainingFixed) / totalFixed;
-                remainingLen -= gridLayout[i];
-            }
-        }
-    } else
-        remainingLen -= totalFixed;
-
-    // Percentage columns/rows are our second priority. Divide the remaining space proportionally
-    // over all percentage columns/rows. IMPORTANT: the size of each column/row is not relative
-    // to 100%, but to the total percentage. For example, if there are three columns, each of 75%,
-    // and the available space is 300px, each column will become 100px in width.
-    if (totalPercent > remainingLen) {
-        int remainingPercent = remainingLen;
-
-        for (int i = 0; i < gridLen; ++i) {
-            if (grid[i].isPercentage()) {
-                gridLayout[i] = (gridLayout[i] * remainingPercent) / totalPercent;
-                remainingLen -= gridLayout[i];
-            }
-        }
-    } else
-        remainingLen -= totalPercent;
-
-    // Relative columns/rows are our last priority. Divide the remaining space proportionally
-    // over all relative columns/rows. IMPORTANT: the relative value of 0* is treated as 1*.
-    if (countRelative) {
-        int lastRelative = 0;
-        int remainingRelative = remainingLen;
-
-        for (int i = 0; i < gridLen; ++i) {
-            if (grid[i].isRelative()) {
-                gridLayout[i] = (max(grid[i].value(), 1.) * remainingRelative) / totalRelative;
-                remainingLen -= gridLayout[i];
-                lastRelative = i;
-            }
-        }
-
-        // If we could not evenly distribute the available space of all of the relative
-        // columns/rows, the remainder will be added to the last column/row.
-        // For example: if we have a space of 100px and three columns (*,*,*), the remainder will
-        // be 1px and will be added to the last column: 33px, 33px, 34px.
-        if (remainingLen) {
-            gridLayout[lastRelative] += remainingLen;
-            remainingLen = 0;
-        }
-    }
-
-    // If we still have some left over space we need to divide it over the already existing
-    // columns/rows
-    if (remainingLen) {
-        // Our first priority is to spread if over the percentage columns. The remaining
-        // space is spread evenly, for example: if we have a space of 100px, the columns
-        // definition of 25%,25% used to result in two columns of 25px. After this the
-        // columns will each be 50px in width.
-        if (countPercent && totalPercent) {
-            int remainingPercent = remainingLen;
-            int changePercent = 0;
-
-            for (int i = 0; i < gridLen; ++i) {
-                if (grid[i].isPercentage()) {
-                    changePercent = (remainingPercent * gridLayout[i]) / totalPercent;
-                    gridLayout[i] += changePercent;
-                    remainingLen -= changePercent;
-                }
-            }
-        } else if (totalFixed) {
-            // Our last priority is to spread the remaining space over the fixed columns.
-            // For example if we have 100px of space and two column of each 40px, both
-            // columns will become exactly 50px.
-            int remainingFixed = remainingLen;
-            int changeFixed = 0;
-
-            for (int i = 0; i < gridLen; ++i) {
-                if (grid[i].isAbsolute()) {
-                    changeFixed = (remainingFixed * gridLayout[i]) / totalFixed;
-                    gridLayout[i] += changeFixed;
-                    remainingLen -= changeFixed;
-                }
-            }
-        }
-    }
-
-    // If we still have some left over space we probably ended up with a remainder of
-    // a division. We cannot spread it evenly anymore. If we have any percentage
-    // columns/rows simply spread the remainder equally over all available percentage columns,
-    // regardless of their size.
-    if (remainingLen && countPercent) {
-        int remainingPercent = remainingLen;
-        int changePercent = 0;
-
-        for (int i = 0; i < gridLen; ++i) {
-            if (grid[i].isPercentage()) {
-                changePercent = remainingPercent / countPercent;
-                gridLayout[i] += changePercent;
-                remainingLen -= changePercent;
-            }
-        }
-    } else if (remainingLen && countFixed) {
-        // If we don't have any percentage columns/rows we only have
-        // fixed columns. Spread the remainder equally over all fixed
-        // columns/rows.
-        int remainingFixed = remainingLen;
-        int changeFixed = 0;
-
-        for (int i = 0; i < gridLen; ++i) {
-            if (grid[i].isAbsolute()) {
-                changeFixed = remainingFixed / countFixed;
-                gridLayout[i] += changeFixed;
-                remainingLen -= changeFixed;
-            }
-        }
-    }
-
-    // Still some left over. Add it to the last column, because it is impossible
-    // spread it evenly or equally.
-    if (remainingLen)
-        gridLayout[gridLen - 1] += remainingLen;
-
-    // now we have the final layout, distribute the delta over it
-    bool worked = true;
-    int* gridDelta = axis.m_deltas.data();
-    for (int i = 0; i < gridLen; ++i) {
-        if (gridLayout[i] && gridLayout[i] + gridDelta[i] <= 0)
-            worked = false;
-        gridLayout[i] += gridDelta[i];
-    }
-    // if the deltas broke something, undo them
-    if (!worked) {
-        for (int i = 0; i < gridLen; ++i)
-            gridLayout[i] -= gridDelta[i];
-        axis.m_deltas.fill(0);
-    }
-}
-
-void RenderFrameSet::notifyFrameEdgeInfoChanged()
-{
-    if (needsLayout())
-        return;
-    // FIXME: We should only recompute the edge info with respect to the frame that changed
-    // and its adjacent frame(s) instead of recomputing the edge info for the entire frameset.
-    computeEdgeInfo();
-}
-
-void RenderFrameSet::fillFromEdgeInfo(const FrameEdgeInfo& edgeInfo, int r, int c)
-{
-    if (edgeInfo.allowBorder(LeftFrameEdge))
-        m_cols.m_allowBorder[c] = true;
-    if (edgeInfo.allowBorder(RightFrameEdge))
-        m_cols.m_allowBorder[c + 1] = true;
-    if (edgeInfo.preventResize(LeftFrameEdge))
-        m_cols.m_preventResize[c] = true;
-    if (edgeInfo.preventResize(RightFrameEdge))
-        m_cols.m_preventResize[c + 1] = true;
-
-    if (edgeInfo.allowBorder(TopFrameEdge))
-        m_rows.m_allowBorder[r] = true;
-    if (edgeInfo.allowBorder(BottomFrameEdge))
-        m_rows.m_allowBorder[r + 1] = true;
-    if (edgeInfo.preventResize(TopFrameEdge))
-        m_rows.m_preventResize[r] = true;
-    if (edgeInfo.preventResize(BottomFrameEdge))
-        m_rows.m_preventResize[r + 1] = true;
-}
-
-void RenderFrameSet::computeEdgeInfo()
-{
-    m_rows.m_preventResize.fill(frameSet()->noResize());
-    m_rows.m_allowBorder.fill(false);
-    m_cols.m_preventResize.fill(frameSet()->noResize());
-    m_cols.m_allowBorder.fill(false);
-
-    LayoutObject* child = firstChild();
-    if (!child)
-        return;
-
-    size_t rows = m_rows.m_sizes.size();
-    size_t cols = m_cols.m_sizes.size();
-    for (size_t r = 0; r < rows; ++r) {
-        for (size_t c = 0; c < cols; ++c) {
-            FrameEdgeInfo edgeInfo;
-            if (child->isFrameSet())
-                edgeInfo = toRenderFrameSet(child)->edgeInfo();
-            else
-                edgeInfo = toRenderFrame(child)->edgeInfo();
-            fillFromEdgeInfo(edgeInfo, r, c);
-            child = child->nextSibling();
-            if (!child)
-                return;
-        }
-    }
-}
-
-FrameEdgeInfo RenderFrameSet::edgeInfo() const
-{
-    FrameEdgeInfo result(frameSet()->noResize(), true);
-
-    int rows = frameSet()->totalRows();
-    int cols = frameSet()->totalCols();
-    if (rows && cols) {
-        result.setPreventResize(LeftFrameEdge, m_cols.m_preventResize[0]);
-        result.setAllowBorder(LeftFrameEdge, m_cols.m_allowBorder[0]);
-        result.setPreventResize(RightFrameEdge, m_cols.m_preventResize[cols]);
-        result.setAllowBorder(RightFrameEdge, m_cols.m_allowBorder[cols]);
-        result.setPreventResize(TopFrameEdge, m_rows.m_preventResize[0]);
-        result.setAllowBorder(TopFrameEdge, m_rows.m_allowBorder[0]);
-        result.setPreventResize(BottomFrameEdge, m_rows.m_preventResize[rows]);
-        result.setAllowBorder(BottomFrameEdge, m_rows.m_allowBorder[rows]);
-    }
-
-    return result;
-}
-
-void RenderFrameSet::layout()
-{
-    ASSERT(needsLayout());
-
-    if (!parent()->isFrameSet() && !document().printing()) {
-        setWidth(view()->viewWidth());
-        setHeight(view()->viewHeight());
-    }
-
-    unsigned cols = frameSet()->totalCols();
-    unsigned rows = frameSet()->totalRows();
-
-    if (m_rows.m_sizes.size() != rows || m_cols.m_sizes.size() != cols) {
-        m_rows.resize(rows);
-        m_cols.resize(cols);
-    }
-
-    LayoutUnit borderThickness = frameSet()->border();
-    layOutAxis(m_rows, frameSet()->rowLengths(), size().height() - (rows - 1) * borderThickness);
-    layOutAxis(m_cols, frameSet()->colLengths(), size().width() - (cols - 1) * borderThickness);
-
-    positionFrames();
-
-    RenderBox::layout();
-
-    computeEdgeInfo();
-
-    updateLayerTransformAfterLayout();
-
-    clearNeedsLayout();
-}
-
-static void clearNeedsLayoutOnHiddenFrames(RenderBox* frame)
-{
-    for (; frame; frame = frame->nextSiblingBox()) {
-        frame->setWidth(0);
-        frame->setHeight(0);
-        frame->clearNeedsLayout();
-        clearNeedsLayoutOnHiddenFrames(frame->firstChildBox());
-    }
-}
-
-void RenderFrameSet::positionFrames()
-{
-    RenderBox* child = firstChildBox();
-    if (!child)
-        return;
-
-    int rows = frameSet()->totalRows();
-    int cols = frameSet()->totalCols();
-
-    int borderThickness = frameSet()->border();
-    LayoutSize size;
-    LayoutPoint position;
-    for (int r = 0; r < rows; r++) {
-        position.setX(0);
-        size.setHeight(m_rows.m_sizes[r]);
-        for (int c = 0; c < cols; c++) {
-            child->setLocation(position);
-            size.setWidth(m_cols.m_sizes[c]);
-
-            // has to be resized and itself resize its contents
-            if (size != child->size()) {
-                child->setSize(size);
-                child->setNeedsLayoutAndFullPaintInvalidation();
-                child->layout();
-            }
-
-            position.setX(position.x() + size.width() + borderThickness);
-
-            child = child->nextSiblingBox();
-            if (!child)
-                return;
-        }
-        position.setY(position.y() + size.height() + borderThickness);
-    }
-
-    // All the remaining frames are hidden to avoid ugly spurious unflowed frames.
-    clearNeedsLayoutOnHiddenFrames(child);
-}
-
-void RenderFrameSet::startResizing(GridAxis& axis, int position)
-{
-    int split = hitTestSplit(axis, position);
-    if (split == noSplit || axis.m_preventResize[split]) {
-        axis.m_splitBeingResized = noSplit;
-        return;
-    }
-    axis.m_splitBeingResized = split;
-    axis.m_splitResizeOffset = position - splitPosition(axis, split);
-}
-
-void RenderFrameSet::continueResizing(GridAxis& axis, int position)
-{
-    if (needsLayout())
-        return;
-    if (axis.m_splitBeingResized == noSplit)
-        return;
-    int currentSplitPosition = splitPosition(axis, axis.m_splitBeingResized);
-    int delta = (position - currentSplitPosition) - axis.m_splitResizeOffset;
-    if (!delta)
-        return;
-    axis.m_deltas[axis.m_splitBeingResized - 1] += delta;
-    axis.m_deltas[axis.m_splitBeingResized] -= delta;
-    setNeedsLayoutAndFullPaintInvalidation();
-}
-
-bool RenderFrameSet::userResize(MouseEvent* evt)
-{
-    if (!m_isResizing) {
-        if (needsLayout())
-            return false;
-        if (evt->type() == EventTypeNames::mousedown && evt->button() == LeftButton) {
-            FloatPoint localPos = absoluteToLocal(FloatPoint(evt->absoluteLocation()), UseTransforms);
-            startResizing(m_cols, localPos.x());
-            startResizing(m_rows, localPos.y());
-            if (m_cols.m_splitBeingResized != noSplit || m_rows.m_splitBeingResized != noSplit) {
-                setIsResizing(true);
-                return true;
-            }
-        }
-    } else {
-        if (evt->type() == EventTypeNames::mousemove || (evt->type() == EventTypeNames::mouseup && evt->button() == LeftButton)) {
-            FloatPoint localPos = absoluteToLocal(FloatPoint(evt->absoluteLocation()), UseTransforms);
-            continueResizing(m_cols, localPos.x());
-            continueResizing(m_rows, localPos.y());
-            if (evt->type() == EventTypeNames::mouseup && evt->button() == LeftButton) {
-                setIsResizing(false);
-                return true;
-            }
-        }
-    }
-
-    return false;
-}
-
-void RenderFrameSet::setIsResizing(bool isResizing)
-{
-    m_isResizing = isResizing;
-    for (LayoutObject* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {
-        if (ancestor->isFrameSet())
-            toRenderFrameSet(ancestor)->m_isChildResizing = isResizing;
-    }
-    if (LocalFrame* frame = this->frame())
-        frame->eventHandler().setResizingFrameSet(isResizing ? frameSet() : 0);
-}
-
-bool RenderFrameSet::canResizeRow(const IntPoint& p) const
-{
-    int r = hitTestSplit(m_rows, p.y());
-    return r != noSplit && !m_rows.m_preventResize[r];
-}
-
-bool RenderFrameSet::canResizeColumn(const IntPoint& p) const
-{
-    int c = hitTestSplit(m_cols, p.x());
-    return c != noSplit && !m_cols.m_preventResize[c];
-}
-
-int RenderFrameSet::splitPosition(const GridAxis& axis, int split) const
-{
-    if (needsLayout())
-        return 0;
-
-    int borderThickness = frameSet()->border();
-
-    int size = axis.m_sizes.size();
-    if (!size)
-        return 0;
-
-    int position = 0;
-    for (int i = 0; i < split && i < size; ++i)
-        position += axis.m_sizes[i] + borderThickness;
-    return position - borderThickness;
-}
-
-int RenderFrameSet::hitTestSplit(const GridAxis& axis, int position) const
-{
-    if (needsLayout())
-        return noSplit;
-
-    int borderThickness = frameSet()->border();
-    if (borderThickness <= 0)
-        return noSplit;
-
-    size_t size = axis.m_sizes.size();
-    if (!size)
-        return noSplit;
-
-    int splitPosition = axis.m_sizes[0];
-    for (size_t i = 1; i < size; ++i) {
-        if (position >= splitPosition && position < splitPosition + borderThickness)
-            return i;
-        splitPosition += borderThickness + axis.m_sizes[i];
-    }
-    return noSplit;
-}
-
-bool RenderFrameSet::isChildAllowed(LayoutObject* child, const LayoutStyle&) const
-{
-    return child->isFrame() || child->isFrameSet();
-}
-
-CursorDirective RenderFrameSet::getCursor(const LayoutPoint& point, Cursor& cursor) const
-{
-    IntPoint roundedPoint = roundedIntPoint(point);
-    if (canResizeRow(roundedPoint)) {
-        cursor = rowResizeCursor();
-        return SetCursor;
-    }
-    if (canResizeColumn(roundedPoint)) {
-        cursor = columnResizeCursor();
-        return SetCursor;
-    }
-    return RenderBox::getCursor(point, cursor);
-}
-
-} // namespace blink