The Tor Browser: layout/xul/grid/nsGridLayout2.cpp@97036ab72558 (annotated)

layout/xul/grid/nsGridLayout2.cpp@97036ab72558 (annotated)

layout/xul/grid/nsGridLayout2.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- 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
 //
 #include "nsGridLayout2.h"
 #include "nsGridRowGroupLayout.h"
 #include "nsGridRow.h"
 #include "nsBox.h"
 #include "nsIScrollableFrame.h"
 #include "nsSprocketLayout.h"
 #include "nsHTMLReflowState.h"
 nsresult
 NS_NewGridLayout2( nsIPresShell* aPresShell, nsBoxLayout** aNewLayout)
 {
   *aNewLayout = new nsGridLayout2(aPresShell);
   NS_IF_ADDREF(*aNewLayout);
   return NS_OK;
 }
 nsGridLayout2::nsGridLayout2(nsIPresShell* aPresShell):nsStackLayout()
 {
 }
 // static
 void
 nsGridLayout2::AddOffset(nsBoxLayoutState& aState, nsIFrame* aChild, nsSize& aSize)
 {
   nsMargin offset;
   GetOffset(aState, aChild, offset);
   aSize.width += offset.left;
   aSize.height += offset.top;
 }
 NS_IMETHODIMP
 nsGridLayout2::Layout(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState)
 {
   // XXX This should be set a better way!
   mGrid.SetBox(aBox);
   NS_ASSERTION(aBox->GetLayoutManager() == this, "setting incorrect box");
   nsresult rv = nsStackLayout::Layout(aBox, aBoxLayoutState);
 #ifdef DEBUG_grid
   mGrid.PrintCellMap();
 #endif
   return rv;
 }
 void
 nsGridLayout2::IntrinsicWidthsDirty(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState)
 {
   nsStackLayout::IntrinsicWidthsDirty(aBox, aBoxLayoutState);
   // XXXldb We really don't need to do all the work that NeedsRebuild
   // does; we just need to mark intrinsic widths dirty on the
   // (row/column)(s/-groups).
   mGrid.NeedsRebuild(aBoxLayoutState);
 }
 nsGrid*
 nsGridLayout2::GetGrid(nsIFrame* aBox, int32_t* aIndex, nsGridRowLayout* aRequestor)
 {
   // XXX This should be set a better way!
   mGrid.SetBox(aBox);
   NS_ASSERTION(aBox->GetLayoutManager() == this, "setting incorrect box");
   return &mGrid;
 }
 void
 nsGridLayout2::AddWidth(nsSize& aSize, nscoord aSize2, bool aIsHorizontal)
 {
   nscoord& size = GET_WIDTH(aSize, aIsHorizontal);
   if (size != NS_INTRINSICSIZE) {
     if (aSize2 == NS_INTRINSICSIZE)
       size = NS_INTRINSICSIZE;
     else
       size += aSize2;
   }
 }
 nsSize
 nsGridLayout2::GetMinSize(nsIFrame* aBox, nsBoxLayoutState& aState)
 {
   nsSize minSize = nsStackLayout::GetMinSize(aBox, aState);
   // if there are no <rows> tags that will sum up our columns,
   // sum up our columns here.
   nsSize total(0,0);
   nsIFrame* rowsBox = mGrid.GetRowsBox();
   nsIFrame* columnsBox = mGrid.GetColumnsBox();
   if (!rowsBox || !columnsBox) {
     if (!rowsBox) {
       // max height is the sum of our rows
       int32_t rows = mGrid.GetRowCount();
       for (int32_t i=0; i < rows; i++)
       {
         nscoord height = mGrid.GetMinRowHeight(aState, i, true);
         AddWidth(total, height, false); // AddHeight
       }
     }
     if (!columnsBox) {
       // max height is the sum of our rows
       int32_t columns = mGrid.GetColumnCount();
       for (int32_t i=0; i < columns; i++)
       {
         nscoord width = mGrid.GetMinRowHeight(aState, i, false);
         AddWidth(total, width, true); // AddWidth
       }
     }
     AddMargin(aBox, total);
     AddOffset(aState, aBox, total);
     AddLargestSize(minSize, total);
   }
   return minSize;
 }
 nsSize
 nsGridLayout2::GetPrefSize(nsIFrame* aBox, nsBoxLayoutState& aState)
 {
   nsSize pref = nsStackLayout::GetPrefSize(aBox, aState);
   // if there are no <rows> tags that will sum up our columns,
   // sum up our columns here.
   nsSize total(0,0);
   nsIFrame* rowsBox = mGrid.GetRowsBox();
   nsIFrame* columnsBox = mGrid.GetColumnsBox();
   if (!rowsBox || !columnsBox) {
     if (!rowsBox) {
       // max height is the sum of our rows
       int32_t rows = mGrid.GetRowCount();
       for (int32_t i=0; i < rows; i++)
       {
         nscoord height = mGrid.GetPrefRowHeight(aState, i, true);
         AddWidth(total, height, false); // AddHeight
       }
     }
     if (!columnsBox) {
       // max height is the sum of our rows
       int32_t columns = mGrid.GetColumnCount();
       for (int32_t i=0; i < columns; i++)
       {
         nscoord width = mGrid.GetPrefRowHeight(aState, i, false);
         AddWidth(total, width, true); // AddWidth
       }
     }
     AddMargin(aBox, total);
     AddOffset(aState, aBox, total);
     AddLargestSize(pref, total);
   }
   return pref;
 }
 nsSize
 nsGridLayout2::GetMaxSize(nsIFrame* aBox, nsBoxLayoutState& aState)
 {
   nsSize maxSize = nsStackLayout::GetMaxSize(aBox, aState);
   // if there are no <rows> tags that will sum up our columns,
   // sum up our columns here.
   nsSize total(NS_INTRINSICSIZE, NS_INTRINSICSIZE);
   nsIFrame* rowsBox = mGrid.GetRowsBox();
   nsIFrame* columnsBox = mGrid.GetColumnsBox();
   if (!rowsBox || !columnsBox) {
     if (!rowsBox) {
       total.height = 0;
       // max height is the sum of our rows
       int32_t rows = mGrid.GetRowCount();
       for (int32_t i=0; i < rows; i++)
       {
         nscoord height = mGrid.GetMaxRowHeight(aState, i, true);
         AddWidth(total, height, false); // AddHeight
       }
     }
     if (!columnsBox) {
       total.width = 0;
       // max height is the sum of our rows
       int32_t columns = mGrid.GetColumnCount();
       for (int32_t i=0; i < columns; i++)
       {
         nscoord width = mGrid.GetMaxRowHeight(aState, i, false);
         AddWidth(total, width, true); // AddWidth
       }
     }
     AddMargin(aBox, total);
     AddOffset(aState, aBox, total);
     AddSmallestSize(maxSize, total);
   }
   return maxSize;
 }
 int32_t
 nsGridLayout2::BuildRows(nsIFrame* aBox, nsGridRow* aRows)
 {
   if (aBox) {
     aRows[0].Init(aBox, true);
     return 1;
   }
   return 0;
 }
 nsMargin
 nsGridLayout2::GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal)
 {
   nsMargin margin(0,0,0,0);
   return margin;
 }
 void
 nsGridLayout2::ChildrenInserted(nsIFrame* aBox, nsBoxLayoutState& aState,
                                 nsIFrame* aPrevBox,
                                 const nsFrameList::Slice& aNewChildren)
 {
   mGrid.NeedsRebuild(aState);
 }
 void
 nsGridLayout2::ChildrenAppended(nsIFrame* aBox, nsBoxLayoutState& aState,
                                 const nsFrameList::Slice& aNewChildren)
 {
   mGrid.NeedsRebuild(aState);
 }
 void
 nsGridLayout2::ChildrenRemoved(nsIFrame* aBox, nsBoxLayoutState& aState,
                                nsIFrame* aChildList)
 {
   mGrid.NeedsRebuild(aState);
 }
 void
 nsGridLayout2::ChildrenSet(nsIFrame* aBox, nsBoxLayoutState& aState,
                            nsIFrame* aChildList)
 {
   mGrid.NeedsRebuild(aState);
 }
 NS_IMPL_ADDREF_INHERITED(nsGridLayout2, nsStackLayout)
 NS_IMPL_RELEASE_INHERITED(nsGridLayout2, nsStackLayout)
 NS_INTERFACE_MAP_BEGIN(nsGridLayout2)
   NS_INTERFACE_MAP_ENTRY(nsIGridPart)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIGridPart)
 NS_INTERFACE_MAP_END_INHERITING(nsStackLayout)

The Tor Browser / annotate

layout/xul/grid/nsGridLayout2.cpp@97036ab72558 (annotated)

layout/xul/grid/nsGridLayout2.cpp