/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Mozilla Communicator client code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ // // Eric Vaughan // Netscape Communications // // See documentation in associated header file // #include "nsGridRowLayout.h" #include "nsBoxLayoutState.h" #include "nsIScrollableFrame.h" #include "nsBox.h" #include "nsStackLayout.h" #include "nsGrid.h" nsGridRowLayout::nsGridRowLayout(nsIPresShell* aPresShell):nsSprocketLayout() { } void nsGridRowLayout::ChildrenInserted(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aPrevBox, nsIBox* aChildList) { ChildAddedOrRemoved(aBox, aState); } void nsGridRowLayout::ChildrenAppended(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList) { ChildAddedOrRemoved(aBox, aState); } void nsGridRowLayout::ChildrenRemoved(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList) { ChildAddedOrRemoved(aBox, aState); } void nsGridRowLayout::ChildrenSet(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList) { ChildAddedOrRemoved(aBox, aState); } void nsGridRowLayout::GetParentGridPart(nsIBox* aBox, nsIBox** aParentBox, nsIGridPart** aParentGridPart) { // go up and find our parent gridRow. Skip and non gridRow // parents. *aParentGridPart = nsnull; *aParentBox = nsnull; // walk up through any scrollboxes aBox = nsGrid::GetScrollBox(aBox); // get the parent if (aBox) aBox = aBox->GetParentBox(); if (aBox) { nsCOMPtr layout; aBox->GetLayoutManager(getter_AddRefs(layout)); nsCOMPtr parentGridRow = do_QueryInterface(layout); if (parentGridRow && parentGridRow->CanContain(this)) { parentGridRow.swap(*aParentGridPart); *aParentBox = aBox; } } } nsGrid* nsGridRowLayout::GetGrid(nsIBox* aBox, PRInt32* aIndex, nsGridRowLayout* aRequestor) { if (aRequestor == nsnull) { nsCOMPtr parent; nsIBox* parentBox; // nsIBox is implemented by nsIFrame and is not refcounted. GetParentGridPart(aBox, &parentBox, getter_AddRefs(parent)); if (parent) return parent->GetGrid(parentBox, aIndex, this); return nsnull; } nsresult rv = NS_OK; PRInt32 index = -1; nsIBox* child = aBox->GetChildBox(); PRInt32 count = 0; while(child) { // if there is a scrollframe walk inside it to its child nsIBox* childBox = nsGrid::GetScrolledBox(child); nsCOMPtr layout; childBox->GetLayoutManager(getter_AddRefs(layout)); // find our requester nsCOMPtr gridRow = do_QueryInterface(layout, &rv); if (NS_SUCCEEDED(rv) && gridRow) { if (layout == aRequestor) { index = count; break; } count += gridRow->GetRowCount(); } else count++; child = child->GetNextBox(); } // if we didn't find ourselves then the tree isn't properly formed yet // this could happen during initial construction so lets just // fail. if (index == -1) { *aIndex = -1; return nsnull; } (*aIndex) += index; nsCOMPtr parent; nsIBox* parentBox; // nsIBox is implemented by nsIFrame and is not refcounted. GetParentGridPart(aBox, &parentBox, getter_AddRefs(parent)); if (parent) return parent->GetGrid(parentBox, aIndex, this); return nsnull; } nsMargin nsGridRowLayout::GetTotalMargin(nsIBox* aBox, PRBool aIsHorizontal) { // get our parents margin nsMargin margin(0,0,0,0); nsCOMPtr part; nsIBox* parent = nsnull; GetParentGridPart(aBox, &parent, getter_AddRefs(part)); if (part && parent) { // if we are the first or last child walk upward and add margins. // make sure we check for a scrollbox aBox = nsGrid::GetScrollBox(aBox); // see if we have a next to see if we are last nsIBox* next = aBox->GetNextBox(); // get the parent first child to see if we are first nsIBox* child = parent->GetChildBox(); margin = part->GetTotalMargin(parent, aIsHorizontal); // if first or last if (child == aBox || next == nsnull) { // if it's not the first child remove the top margin // we don't need it. if (child != aBox) { if (aIsHorizontal) margin.top = 0; else margin.left = 0; } // if it's not the last child remove the bottom margin // we don't need it. if (next != nsnull) { if (aIsHorizontal) margin.bottom = 0; else margin.right = 0; } } } // add ours to it. nsMargin ourMargin; aBox->GetMargin(ourMargin); margin += ourMargin; return margin; } NS_IMPL_ADDREF_INHERITED(nsGridRowLayout, nsBoxLayout) NS_IMPL_RELEASE_INHERITED(nsGridRowLayout, nsBoxLayout) NS_INTERFACE_MAP_BEGIN(nsGridRowLayout) NS_INTERFACE_MAP_ENTRY(nsIGridPart) NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIGridPart) NS_INTERFACE_MAP_END_INHERITING(nsBoxLayout)