The Tor Browser: layout/xul/grid/nsGridRowLeafFrame.cpp@fc2d59ddac77

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 //

     7 // Eric Vaughan

     8 // Netscape Communications

     9 //

    10 // See documentation in associated header file

    11 //

    13 #include "nsGridRowLeafFrame.h"

    14 #include "nsGridRowLeafLayout.h"

    15 #include "nsGridRow.h"

    16 #include "nsBoxLayoutState.h"

    17 #include "nsGridLayout2.h"

    19 already_AddRefed<nsBoxLayout> NS_NewGridRowLeafLayout();

    21 nsIFrame*

    22 NS_NewGridRowLeafFrame(nsIPresShell* aPresShell,

    23                        nsStyleContext* aContext)

    24 {

    25   nsCOMPtr<nsBoxLayout> layout = NS_NewGridRowLeafLayout();

    26   return new (aPresShell) nsGridRowLeafFrame(aPresShell, aContext, false,

    27                                              layout);

    28 }

    30 NS_IMPL_FRAMEARENA_HELPERS(nsGridRowLeafFrame)

    32 /*

    33  * Our border and padding could be affected by our columns or rows.

    34  * Let's go check it out.

    35  */

    36 nsresult

    37 nsGridRowLeafFrame::GetBorderAndPadding(nsMargin& aBorderAndPadding)

    38 {

    39   // if our columns have made our padding larger add it in.

    40   nsresult rv = nsBoxFrame::GetBorderAndPadding(aBorderAndPadding);

    42   nsIGridPart* part = nsGrid::GetPartFromBox(this);

    43   if (!part)

    44     return rv;

    46   int32_t index = 0;

    47   nsGrid* grid = part->GetGrid(this, &index);

    49   if (!grid)

    50     return rv;

    52   bool isHorizontal = IsHorizontal();

    54   nsBoxLayoutState state(PresContext());

    56   int32_t firstIndex = 0;

    57   int32_t lastIndex = 0;

    58   nsGridRow* firstRow = nullptr;

    59   nsGridRow* lastRow = nullptr;

    60   grid->GetFirstAndLastRow(state, firstIndex, lastIndex, firstRow, lastRow, isHorizontal);

    62   // only the first and last rows can be affected.

    63   if (firstRow && firstRow->GetBox() == this) {

    65     nscoord top = 0;

    66     nscoord bottom = 0;

    67     grid->GetRowOffsets(state, firstIndex, top, bottom, isHorizontal);

    69     if (isHorizontal) {

    70       if (top > aBorderAndPadding.top)

    71         aBorderAndPadding.top = top;

    72     } else {

    73       if (top > aBorderAndPadding.left)

    74         aBorderAndPadding.left = top;

    75     }

    76   }

    78   if (lastRow && lastRow->GetBox() == this) {

    80     nscoord top = 0;

    81     nscoord bottom = 0;

    82     grid->GetRowOffsets(state, lastIndex, top, bottom, isHorizontal);

    84     if (isHorizontal) {

    85       if (bottom > aBorderAndPadding.bottom)

    86         aBorderAndPadding.bottom = bottom;

    87     } else {

    88       if (bottom > aBorderAndPadding.right)

    89         aBorderAndPadding.right = bottom;

    90     }

    92   }

    94   return rv;

    95 }

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