| /** |
| * This file is part of the KDE project. |
| * |
| * 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., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "RenderFrameSet.h" |
| |
| #include "Document.h" |
| #include "EventHandler.h" |
| #include "EventNames.h" |
| #include "Frame.h" |
| #include "FrameView.h" |
| #include "HTMLFrameSetElement.h" |
| #include "HitTestRequest.h" |
| #include "HitTestResult.h" |
| #include "MouseEvent.h" |
| #include "RenderFrame.h" |
| #include "RenderView.h" |
| #include "TextStream.h" |
| |
| namespace WebCore { |
| |
| using namespace EventNames; |
| |
| RenderFrameSet::RenderFrameSet(HTMLFrameSetElement* frameSet) |
| : RenderContainer(frameSet) |
| , m_isResizing(false) |
| , m_isChildResizing(false) |
| { |
| setInline(false); |
| } |
| |
| RenderFrameSet::~RenderFrameSet() |
| { |
| } |
| |
| RenderFrameSet::GridAxis::GridAxis() |
| : m_splitBeingResized(noSplit) |
| { |
| } |
| |
| inline HTMLFrameSetElement* RenderFrameSet::frameSet() const |
| { |
| return static_cast<HTMLFrameSetElement*>(node()); |
| } |
| |
| bool RenderFrameSet::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, |
| int x, int y, int tx, int ty, HitTestAction action) |
| { |
| if (action != HitTestForeground) |
| return false; |
| |
| bool inside = RenderContainer::nodeAtPoint(request, result, x, y, tx, ty, action) |
| || m_isResizing || canResize(IntPoint(x, y)); |
| |
| if (inside && frameSet()->noResize() |
| && !request.readonly && !result.innerNode()) { |
| result.setInnerNode(node()); |
| result.setInnerNonSharedNode(node()); |
| } |
| |
| return inside || m_isChildResizing; |
| } |
| |
| void RenderFrameSet::GridAxis::resize(int size) |
| { |
| m_sizes.resize(size); |
| m_deltas.resize(size); |
| m_deltas.fill(0); |
| m_isSplitResizable.resize(size); |
| } |
| |
| void RenderFrameSet::layOutAxis(GridAxis& axis, const Length* grid, int availableLen) |
| { |
| int* gridLayout = axis.m_sizes; |
| |
| if (!grid) { |
| 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].isFixed()) { |
| gridLayout[i] = max(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].isPercent()) { |
| gridLayout[i] = max(grid[i].calcValue(availableLen), 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(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].isFixed()) { |
| 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].isPercent()) { |
| 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].isPercent()) { |
| 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].isFixed()) { |
| 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 can not 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].isPercent()) { |
| changePercent = remainingPercent / countPercent; |
| gridLayout[i] += changePercent; |
| remainingLen -= changePercent; |
| } |
| } |
| } |
| |
| // If we don't have any percentage columns/rows we only have fixed columns. Spread |
| // the remainder equally over all fixed columns/rows. |
| else if (remainingLen && countFixed) { |
| int remainingFixed = remainingLen; |
| int changeFixed = 0; |
| |
| for (int i = 0; i < gridLen; ++i) { |
| if (grid[i].isFixed()) { |
| 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; |
| 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::findNonResizableSplits() |
| { |
| m_rows.m_isSplitResizable.fill(true); |
| m_cols.m_isSplitResizable.fill(true); |
| |
| RenderObject* child = firstChild(); |
| if (!child) |
| return; |
| |
| int rows = frameSet()->totalRows(); |
| int cols = frameSet()->totalCols(); |
| for (int r = 0; r < rows; ++r) { |
| for (int c = 0; c < cols; ++c) { |
| bool fixed; |
| if (child->isFrameSet()) |
| fixed = static_cast<RenderFrameSet*>(child)->frameSet()->noResize(); |
| else |
| fixed = static_cast<RenderFrame*>(child)->element()->noResize(); |
| if (fixed) { |
| if (cols > 1) { |
| if (c > 0) |
| m_cols.m_isSplitResizable[c - 1] = false; |
| m_cols.m_isSplitResizable[c] = false; |
| } |
| if (rows > 1) { |
| if (r > 0) |
| m_rows.m_isSplitResizable[r - 1] = false; |
| m_rows.m_isSplitResizable[r] = false; |
| } |
| } |
| child = child->nextSibling(); |
| if (!child) |
| return; |
| } |
| } |
| } |
| |
| void RenderFrameSet::layout() |
| { |
| ASSERT(needsLayout()); |
| ASSERT(minMaxKnown()); |
| |
| if (!parent()->isFrameSet()) { |
| FrameView* v = view()->frameView(); |
| m_width = v->visibleWidth(); |
| m_height = v->visibleHeight(); |
| } |
| |
| size_t cols = frameSet()->totalCols(); |
| size_t rows = frameSet()->totalRows(); |
| |
| if (m_rows.m_sizes.size() != rows || m_cols.m_sizes.size() != cols) { |
| m_rows.resize(rows); |
| m_cols.resize(cols); |
| findNonResizableSplits(); |
| } |
| |
| int borderThickness = frameSet()->border(); |
| layOutAxis(m_rows, frameSet()->rowLengths(), m_height - (rows - 1) * borderThickness); |
| layOutAxis(m_cols, frameSet()->colLengths(), m_width - (cols - 1) * borderThickness); |
| |
| positionFrames(); |
| |
| RenderContainer::layout(); |
| |
| setNeedsLayout(false); |
| } |
| |
| void RenderFrameSet::positionFrames() |
| { |
| RenderObject* child = firstChild(); |
| if (!child) |
| return; |
| |
| int rows = frameSet()->totalRows(); |
| int cols = frameSet()->totalCols(); |
| |
| int yPos = 0; |
| int borderThickness = frameSet()->border(); |
| for (int r = 0; r < rows; r++) { |
| int xPos = 0; |
| int height = m_rows.m_sizes[r]; |
| for (int c = 0; c < cols; c++) { |
| child->setPos(xPos, yPos); |
| int width = m_cols.m_sizes[c]; |
| |
| // has to be resized and itself resize its contents |
| if (width != child->width() || height != child->height()) { |
| child->setWidth(width); |
| child->setHeight(height); |
| child->setNeedsLayout(true); |
| child->layout(); |
| } |
| |
| xPos += width + borderThickness; |
| |
| child = child->nextSibling(); |
| if (!child) |
| return; |
| } |
| yPos += height + borderThickness; |
| } |
| |
| // all the remaining frames are hidden to avoid ugly spurious unflowed frames |
| for (; child; child = child->nextSibling()) { |
| child->setWidth(0); |
| child->setHeight(0); |
| child->setNeedsLayout(false); |
| } |
| } |
| |
| void RenderFrameSet::startResizing(GridAxis& axis, int position) |
| { |
| int split = hitTestSplit(axis, position); |
| if (split == noSplit || !axis.m_isSplitResizable[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; |
| axis.m_deltas[axis.m_splitBeingResized] += delta; |
| axis.m_deltas[axis.m_splitBeingResized + 1] -= delta; |
| setNeedsLayout(true); |
| } |
| |
| bool RenderFrameSet::userResize(MouseEvent* evt) |
| { |
| if (needsLayout()) |
| return false; |
| |
| if (!m_isResizing) { |
| if (evt->type() == mousedownEvent) { |
| startResizing(m_cols, evt->pageX() - xPos()); |
| startResizing(m_rows, evt->pageY() - yPos()); |
| if (m_cols.m_splitBeingResized != noSplit || m_rows.m_splitBeingResized != noSplit) { |
| setIsResizing(true); |
| return true; |
| } |
| } |
| } else { |
| if (evt->type() == mousemoveEvent || evt->type() == mouseupEvent) { |
| continueResizing(m_cols, evt->pageX() - xPos()); |
| continueResizing(m_rows, evt->pageY() - yPos()); |
| if (evt->type() == mouseupEvent) { |
| setIsResizing(false); |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| void RenderFrameSet::setIsResizing(bool isResizing) |
| { |
| m_isResizing = isResizing; |
| for (RenderObject* p = parent(); p; p = p->parent()) |
| if (p->isFrameSet()) |
| static_cast<RenderFrameSet*>(p)->m_isChildResizing = isResizing; |
| if (Frame* frame = document()->frame()) |
| frame->eventHandler()->setResizingFrameSet(isResizing ? frameSet() : 0); |
| } |
| |
| bool RenderFrameSet::isResizingRow() const |
| { |
| return m_isResizing && m_rows.m_splitBeingResized != noSplit; |
| } |
| |
| bool RenderFrameSet::isResizingColumn() const |
| { |
| return m_isResizing && m_cols.m_splitBeingResized != noSplit; |
| } |
| |
| bool RenderFrameSet::canResize(const IntPoint& p) const |
| { |
| return hitTestSplit(m_cols, p.x()) != noSplit || hitTestSplit(m_rows, p.y()) != noSplit; |
| } |
| |
| bool RenderFrameSet::canResizeRow(const IntPoint& p) const |
| { |
| int r = hitTestSplit(m_rows, p.y() - yPos()); |
| return r != noSplit && m_rows.m_isSplitResizable[r]; |
| } |
| |
| bool RenderFrameSet::canResizeColumn(const IntPoint& p) const |
| { |
| int c = hitTestSplit(m_cols, p.x() - xPos()); |
| return c != noSplit && m_cols.m_isSplitResizable[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 - 1; |
| splitPosition += borderThickness + axis.m_sizes[i]; |
| } |
| return noSplit; |
| } |
| |
| #ifndef NDEBUG |
| void RenderFrameSet::dump(TextStream* stream, DeprecatedString ind) const |
| { |
| *stream << " totalrows=" << frameSet()->totalRows(); |
| *stream << " totalcols=" << frameSet()->totalCols(); |
| |
| for (int i = 0; i < frameSet()->totalRows(); i++) |
| *stream << " hSplitvar(" << i << ")=" << m_rows.m_isSplitResizable[i]; |
| |
| for (int i = 0; i < frameSet()->totalCols(); i++) |
| *stream << " vSplitvar(" << i << ")=" << m_cols.m_isSplitResizable[i]; |
| |
| RenderContainer::dump(stream,ind); |
| } |
| #endif |
| |
| } // namespace WebCore |
