import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/xul/grid/nsGridRowGroupLayout.cpp

@@ -0,0 +1,265 @@
+/* -*- 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 "nsBox.h"
+#include "nsBoxLayoutState.h"
+#include "nsGridLayout2.h"
+#include "nsGridRow.h"
+#include "mozilla/ReflowInput.h"
+
+already_AddRefed<nsBoxLayout> NS_NewGridRowGroupLayout()
+{
+  RefPtr<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 = IsXULHorizontal(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::GetXULPrefSize(nsIFrame* aBox, nsBoxLayoutState& aState)
+{ 
+  nsSize vpref = nsGridRowLayout::GetXULPrefSize(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 = IsXULHorizontal(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::GetXULMaxSize(nsIFrame* aBox, nsBoxLayoutState& aState)
+{
+ nsSize maxSize = nsGridRowLayout::GetXULMaxSize(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 = IsXULHorizontal(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::GetXULMinSize(nsIFrame* aBox, nsBoxLayoutState& aState)
+{
+  nsSize minSize = nsGridRowLayout::GetXULMinSize(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 = IsXULHorizontal(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 MarkIntrinsicISizesDirty for every row group.
+    aState.PresShell()->FrameNeedsReflow(aBox, nsIPresShell::eTreeChange,
+                                         NS_FRAME_IS_DIRTY);
+    nsIFrame* child = nsBox::GetChildXULBox(aBox);
+
+    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 = nsBox::GetNextXULBox(child);
+    }
+  }
+}
+
+
+void
+nsGridRowGroupLayout::CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount)
+{
+  if (aBox) {
+    int32_t startCount = aRowCount;
+
+    nsIFrame* child = nsBox::GetChildXULBox(aBox);
+
+    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 = nsBox::GetNextXULBox(child);
+        deepChild = child;
+        continue;
+      }
+
+      child = nsBox::GetNextXULBox(child);
+
+      // 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 = nsBox::GetChildXULBox(aBox);
+
+    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 = nsBox::GetNextXULBox(child);
+        deepChild = child;
+        continue;
+      }
+
+      aRows[rowCount].Init(child, true);
+
+      child = nsBox::GetNextXULBox(child);
+
+      // 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->GetXULBorderAndPadding(borderPadding);
+  margin += borderPadding;
+
+  return margin;
+}
+
+