1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/grid/nsGridRowLayout.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,193 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +//
1.10 +// Eric Vaughan
1.11 +// Netscape Communications
1.12 +//
1.13 +// See documentation in associated header file
1.14 +//
1.15 +
1.16 +#include "nsGridRowLayout.h"
1.17 +#include "nsBoxLayoutState.h"
1.18 +#include "nsIScrollableFrame.h"
1.19 +#include "nsBox.h"
1.20 +#include "nsStackLayout.h"
1.21 +#include "nsGrid.h"
1.22 +
1.23 +nsGridRowLayout::nsGridRowLayout():nsSprocketLayout()
1.24 +{
1.25 +}
1.26 +
1.27 +void
1.28 +nsGridRowLayout::ChildrenInserted(nsIFrame* aBox, nsBoxLayoutState& aState,
1.29 + nsIFrame* aPrevBox,
1.30 + const nsFrameList::Slice& aNewChildren)
1.31 +{
1.32 + ChildAddedOrRemoved(aBox, aState);
1.33 +}
1.34 +
1.35 +void
1.36 +nsGridRowLayout::ChildrenAppended(nsIFrame* aBox, nsBoxLayoutState& aState,
1.37 + const nsFrameList::Slice& aNewChildren)
1.38 +{
1.39 + ChildAddedOrRemoved(aBox, aState);
1.40 +}
1.41 +
1.42 +void
1.43 +nsGridRowLayout::ChildrenRemoved(nsIFrame* aBox, nsBoxLayoutState& aState, nsIFrame* aChildList)
1.44 +{
1.45 + ChildAddedOrRemoved(aBox, aState);
1.46 +}
1.47 +
1.48 +void
1.49 +nsGridRowLayout::ChildrenSet(nsIFrame* aBox, nsBoxLayoutState& aState, nsIFrame* aChildList)
1.50 +{
1.51 + ChildAddedOrRemoved(aBox, aState);
1.52 +}
1.53 +
1.54 +nsIGridPart*
1.55 +nsGridRowLayout::GetParentGridPart(nsIFrame* aBox, nsIFrame** aParentBox)
1.56 +{
1.57 + // go up and find our parent gridRow. Skip and non gridRow
1.58 + // parents.
1.59 + *aParentBox = nullptr;
1.60 +
1.61 + // walk up through any scrollboxes
1.62 + aBox = nsGrid::GetScrollBox(aBox);
1.63 +
1.64 + // get the parent
1.65 + if (aBox)
1.66 + aBox = aBox->GetParentBox();
1.67 +
1.68 + if (aBox)
1.69 + {
1.70 + nsIGridPart* parentGridRow = nsGrid::GetPartFromBox(aBox);
1.71 + if (parentGridRow && parentGridRow->CanContain(this)) {
1.72 + *aParentBox = aBox;
1.73 + return parentGridRow;
1.74 + }
1.75 + }
1.76 +
1.77 + return nullptr;
1.78 +}
1.79 +
1.80 +
1.81 +nsGrid*
1.82 +nsGridRowLayout::GetGrid(nsIFrame* aBox, int32_t* aIndex, nsGridRowLayout* aRequestor)
1.83 +{
1.84 +
1.85 + if (aRequestor == nullptr)
1.86 + {
1.87 + nsIFrame* parentBox; // nsIFrame is implemented by nsIFrame and is not refcounted.
1.88 + nsIGridPart* parent = GetParentGridPart(aBox, &parentBox);
1.89 + if (parent)
1.90 + return parent->GetGrid(parentBox, aIndex, this);
1.91 + return nullptr;
1.92 + }
1.93 +
1.94 + int32_t index = -1;
1.95 + nsIFrame* child = aBox->GetChildBox();
1.96 + int32_t count = 0;
1.97 + while(child)
1.98 + {
1.99 + // if there is a scrollframe walk inside it to its child
1.100 + nsIFrame* childBox = nsGrid::GetScrolledBox(child);
1.101 +
1.102 + nsBoxLayout* layout = childBox->GetLayoutManager();
1.103 + nsIGridPart* gridRow = nsGrid::GetPartFromBox(childBox);
1.104 + if (gridRow)
1.105 + {
1.106 + if (layout == aRequestor) {
1.107 + index = count;
1.108 + break;
1.109 + }
1.110 + count += gridRow->GetRowCount();
1.111 + } else
1.112 + count++;
1.113 +
1.114 + child = child->GetNextBox();
1.115 + }
1.116 +
1.117 + // if we didn't find ourselves then the tree isn't properly formed yet
1.118 + // this could happen during initial construction so lets just
1.119 + // fail.
1.120 + if (index == -1) {
1.121 + *aIndex = -1;
1.122 + return nullptr;
1.123 + }
1.124 +
1.125 + (*aIndex) += index;
1.126 +
1.127 + nsIFrame* parentBox; // nsIFrame is implemented by nsIFrame and is not refcounted.
1.128 + nsIGridPart* parent = GetParentGridPart(aBox, &parentBox);
1.129 + if (parent)
1.130 + return parent->GetGrid(parentBox, aIndex, this);
1.131 +
1.132 + return nullptr;
1.133 +}
1.134 +
1.135 +nsMargin
1.136 +nsGridRowLayout::GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal)
1.137 +{
1.138 + // get our parents margin
1.139 + nsMargin margin(0,0,0,0);
1.140 + nsIFrame* parent = nullptr;
1.141 + nsIGridPart* part = GetParentGridPart(aBox, &parent);
1.142 + if (part && parent) {
1.143 + // if we are the first or last child walk upward and add margins.
1.144 +
1.145 + // make sure we check for a scrollbox
1.146 + aBox = nsGrid::GetScrollBox(aBox);
1.147 +
1.148 + // see if we have a next to see if we are last
1.149 + nsIFrame* next = aBox->GetNextBox();
1.150 +
1.151 + // get the parent first child to see if we are first
1.152 + nsIFrame* child = parent->GetChildBox();
1.153 +
1.154 + margin = part->GetTotalMargin(parent, aIsHorizontal);
1.155 +
1.156 + // if first or last
1.157 + if (child == aBox || next == nullptr) {
1.158 +
1.159 + // if it's not the first child remove the top margin
1.160 + // we don't need it.
1.161 + if (child != aBox)
1.162 + {
1.163 + if (aIsHorizontal)
1.164 + margin.top = 0;
1.165 + else
1.166 + margin.left = 0;
1.167 + }
1.168 +
1.169 + // if it's not the last child remove the bottom margin
1.170 + // we don't need it.
1.171 + if (next != nullptr)
1.172 + {
1.173 + if (aIsHorizontal)
1.174 + margin.bottom = 0;
1.175 + else
1.176 + margin.right = 0;
1.177 + }
1.178 +
1.179 + }
1.180 + }
1.181 +
1.182 + // add ours to it.
1.183 + nsMargin ourMargin;
1.184 + aBox->GetMargin(ourMargin);
1.185 + margin += ourMargin;
1.186 +
1.187 + return margin;
1.188 +}
1.189 +
1.190 +NS_IMPL_ADDREF_INHERITED(nsGridRowLayout, nsBoxLayout)
1.191 +NS_IMPL_RELEASE_INHERITED(nsGridRowLayout, nsBoxLayout)
1.192 +
1.193 +NS_INTERFACE_MAP_BEGIN(nsGridRowLayout)
1.194 + NS_INTERFACE_MAP_ENTRY(nsIGridPart)
1.195 + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIGridPart)
1.196 +NS_INTERFACE_MAP_END_INHERITING(nsBoxLayout)
