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