gecko/layout/xul/grid/nsGridRowGroupLayout.cpp

265 lines
6.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//
// Eric Vaughan
// Netscape Communications
//
// See documentation in associated header file
//
/*
* The nsGridRowGroupLayout implements the <rows> or <columns> tag in a grid.
*/
#include "nsGridRowGroupLayout.h"
#include "nsCOMPtr.h"
#include "nsIScrollableFrame.h"
#include "nsBoxLayoutState.h"
#include "nsGridLayout2.h"
#include "nsGridRow.h"
#include "nsHTMLReflowState.h"
already_AddRefed<nsBoxLayout> NS_NewGridRowGroupLayout()
{
nsRefPtr<nsBoxLayout> layout = new nsGridRowGroupLayout();
return layout.forget();
}
nsGridRowGroupLayout::nsGridRowGroupLayout():nsGridRowLayout(), mRowCount(0)
{
}
nsGridRowGroupLayout::~nsGridRowGroupLayout()
{
}
void
nsGridRowGroupLayout::ChildAddedOrRemoved(nsIFrame* aBox, nsBoxLayoutState& aState)
{
int32_t index = 0;
nsGrid* grid = GetGrid(aBox, &index);
bool isHorizontal = IsHorizontal(aBox);
if (grid)
grid->RowAddedOrRemoved(aState, index, isHorizontal);
}
void
nsGridRowGroupLayout::AddWidth(nsSize& aSize, nscoord aSize2, bool aIsHorizontal)
{
nscoord& size = GET_WIDTH(aSize, aIsHorizontal);
if (size == NS_INTRINSICSIZE || aSize2 == NS_INTRINSICSIZE)
size = NS_INTRINSICSIZE;
else
size += aSize2;
}
nsSize
nsGridRowGroupLayout::GetPrefSize(nsIFrame* aBox, nsBoxLayoutState& aState)
{
nsSize vpref = nsGridRowLayout::GetPrefSize(aBox, aState);
/* It is possible that we could have some extra columns. This is when less columns in XUL were
* defined that needed. And example might be a grid with 3 defined columns but a row with 4 cells in
* it. We would need an extra column to make the grid work. But because that extra column does not
* have a box associated with it we must add its size in manually. Remember we could have extra rows
* as well.
*/
int32_t index = 0;
nsGrid* grid = GetGrid(aBox, &index);
if (grid)
{
// make sure we add in extra columns sizes as well
bool isHorizontal = IsHorizontal(aBox);
int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
for (int32_t i=0; i < extraColumns; i++)
{
nscoord pref =
grid->GetPrefRowHeight(aState, i+start, !isHorizontal); // GetPrefColumnWidth
AddWidth(vpref, pref, isHorizontal);
}
}
return vpref;
}
nsSize
nsGridRowGroupLayout::GetMaxSize(nsIFrame* aBox, nsBoxLayoutState& aState)
{
nsSize maxSize = nsGridRowLayout::GetMaxSize(aBox, aState);
int32_t index = 0;
nsGrid* grid = GetGrid(aBox, &index);
if (grid)
{
// make sure we add in extra columns sizes as well
bool isHorizontal = IsHorizontal(aBox);
int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
for (int32_t i=0; i < extraColumns; i++)
{
nscoord max =
grid->GetMaxRowHeight(aState, i+start, !isHorizontal); // GetMaxColumnWidth
AddWidth(maxSize, max, isHorizontal);
}
}
return maxSize;
}
nsSize
nsGridRowGroupLayout::GetMinSize(nsIFrame* aBox, nsBoxLayoutState& aState)
{
nsSize minSize = nsGridRowLayout::GetMinSize(aBox, aState);
int32_t index = 0;
nsGrid* grid = GetGrid(aBox, &index);
if (grid)
{
// make sure we add in extra columns sizes as well
bool isHorizontal = IsHorizontal(aBox);
int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
for (int32_t i=0; i < extraColumns; i++)
{
nscoord min =
grid->GetMinRowHeight(aState, i+start, !isHorizontal); // GetMinColumnWidth
AddWidth(minSize, min, isHorizontal);
}
}
return minSize;
}
/*
* Run down through our children dirtying them recursively.
*/
void
nsGridRowGroupLayout::DirtyRows(nsIFrame* aBox, nsBoxLayoutState& aState)
{
if (aBox) {
// mark us dirty
// XXXldb We probably don't want to walk up the ancestor chain
// calling MarkIntrinsicWidthsDirty for every row group.
aState.PresShell()->FrameNeedsReflow(aBox, nsIPresShell::eTreeChange,
NS_FRAME_IS_DIRTY);
nsIFrame* child = aBox->GetChildBox();
while(child) {
// walk into scrollframes
nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
// walk into other monuments
nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
if (monument)
monument->DirtyRows(deepChild, aState);
child = child->GetNextBox();
}
}
}
void
nsGridRowGroupLayout::CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount)
{
if (aBox) {
int32_t startCount = aRowCount;
nsIFrame* child = aBox->GetChildBox();
while(child) {
// first see if it is a scrollframe. If so walk down into it and get the scrolled child
nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
if (monument) {
monument->CountRowsColumns(deepChild, aRowCount, aComputedColumnCount);
child = child->GetNextBox();
deepChild = child;
continue;
}
child = child->GetNextBox();
// if not a monument. Then count it. It will be a bogus row
aRowCount++;
}
mRowCount = aRowCount - startCount;
}
}
/**
* Fill out the given row structure recursively
*/
int32_t
nsGridRowGroupLayout::BuildRows(nsIFrame* aBox, nsGridRow* aRows)
{
int32_t rowCount = 0;
if (aBox) {
nsIFrame* child = aBox->GetChildBox();
while(child) {
// first see if it is a scrollframe. If so walk down into it and get the scrolled child
nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
if (monument) {
rowCount += monument->BuildRows(deepChild, &aRows[rowCount]);
child = child->GetNextBox();
deepChild = child;
continue;
}
aRows[rowCount].Init(child, true);
child = child->GetNextBox();
// if not a monument. Then count it. It will be a bogus row
rowCount++;
}
}
return rowCount;
}
nsMargin
nsGridRowGroupLayout::GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal)
{
// group have border and padding added to the total margin
nsMargin margin = nsGridRowLayout::GetTotalMargin(aBox, aIsHorizontal);
// make sure we have the scrollframe on the outside if it has one.
// that's where the border is.
aBox = nsGrid::GetScrollBox(aBox);
// add our border/padding to it
nsMargin borderPadding(0,0,0,0);
aBox->GetBorderAndPadding(borderPadding);
margin += borderPadding;
return margin;
}