зеркало из https://github.com/mozilla/pjs.git
1042 строки
29 KiB
C++
1042 строки
29 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla XForms support.
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*
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* The Initial Developer of the Original Code is
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* Novell, Inc.
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* Portions created by the Initial Developer are Copyright (C) 2004
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Allan Beaufour <abeaufour@novell.com>
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* David Landwehr <dlandwehr@novell.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsXFormsMDGEngine.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMNodeList.h"
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#include "nsIDOMText.h"
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#include "nsIDOMXPathExpression.h"
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#include "nsIDOMXPathResult.h"
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#include "nsDeque.h"
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#ifdef DEBUG
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//# define DEBUG_XF_MDG
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const char* gMIPNames[] = {"type",
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"r/o",
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"req",
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"rel",
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"calc",
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"const",
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"p3ptype"
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};
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#endif
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/* ------------------------------------ */
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/* --------- nsXFormsMDGNode ---------- */
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/* ------------------------------------ */
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MOZ_DECL_CTOR_COUNTER(nsXFormsMDGNode)
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nsXFormsMDGNode::nsXFormsMDGNode(nsIDOMNode *aNode,
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const ModelItemPropName aType)
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: mDirty (PR_TRUE), mHasExpr(PR_FALSE), mContextNode(aNode),
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mCount(0), mType(aType), mContextSize(0), mContextPosition(0),
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mDynFunc(PR_FALSE), mNext(nsnull)
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{
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MOZ_COUNT_CTOR(nsXFormsMDGNode);
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}
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nsXFormsMDGNode::~nsXFormsMDGNode()
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{
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MOZ_COUNT_DTOR(nsXFormsMDGNode);
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}
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void
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nsXFormsMDGNode::SetExpression(nsIDOMXPathExpression *aExpression,
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PRBool aDynFunc,
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PRInt32 aContextPosition,
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PRInt32 aContextSize)
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{
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mHasExpr = PR_TRUE;
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mDynFunc = aDynFunc;
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mExpression = aExpression;
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mContextPosition = aContextPosition;
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mContextSize = aContextSize;
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}
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PRBool
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nsXFormsMDGNode::HasExpr() const
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{
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return mHasExpr;
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}
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PRBool
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nsXFormsMDGNode::IsDirty() const
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{
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// A node is always dirty, if it depends on a dynamic function.
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return mDirty || mDynFunc;
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}
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void
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nsXFormsMDGNode::MarkDirty()
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{
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mDirty = PR_TRUE;
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}
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void
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nsXFormsMDGNode::MarkClean()
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{
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mDirty = PR_FALSE;
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}
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/* ------------------------------------ */
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/* -------- nsXFormsMDGEngine --------- */
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/* ------------------------------------ */
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MOZ_DECL_CTOR_COUNTER(nsXFormsMDGEngine)
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nsXFormsMDGEngine::nsXFormsMDGEngine()
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: mNodesInGraph(0)
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{
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MOZ_COUNT_CTOR(nsXFormsMDGEngine);
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}
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nsXFormsMDGEngine::~nsXFormsMDGEngine()
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{
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mNodeToMDG.Enumerate(DeleteLinkedNodes, nsnull);
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MOZ_COUNT_DTOR(nsXFormsMDGEngine);
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}
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nsresult
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nsXFormsMDGEngine::Init()
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{
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nsresult rv = NS_ERROR_FAILURE;
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if (mNodeStates.Init() && mNodeToMDG.Init()) {
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rv = NS_OK;
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}
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return rv;
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}
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nsresult
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nsXFormsMDGEngine::AddMIP(ModelItemPropName aType,
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nsIDOMXPathExpression *aExpression,
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nsXFormsMDGSet *aDependencies,
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PRBool aDynFunc,
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nsIDOMNode *aContextNode,
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PRInt32 aContextPos,
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PRInt32 aContextSize)
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{
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NS_ENSURE_ARG(aContextNode);
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#ifdef DEBUG_XF_MDG
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nsAutoString nodename;
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aContextNode->GetNodeName(nodename);
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printf("nsXFormsMDGEngine::AddMIP(aContextNode=%s, aExpression=%p, aDependencies=|%d|,\n",
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NS_ConvertUCS2toUTF8(nodename).get(),
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(void*) aExpression,
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aDependencies->Count());
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printf(" aContextPos=%d, aContextSize=%d, aType=%s, aDynFunc=%d)\n",
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aContextPos, aContextSize, gMIPNames[aType], aDynFunc);
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#endif
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nsXFormsMDGNode* newnode = GetNode(aContextNode,
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aType,
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PR_TRUE);
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if (!newnode) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (newnode->HasExpr()) {
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// MIP already in the graph. That is, there is already a MIP of the same
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// type for this node, which is illegal.
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// Example: <bind nodeset="x" required="true()" required="false()"/>
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return NS_ERROR_ABORT;
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}
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if (aExpression) {
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newnode->SetExpression(aExpression, aDynFunc, aContextPos, aContextSize);
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}
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// Add dependencies
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if (aDependencies) {
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nsCOMPtr<nsIDOMNode> dep_domnode;
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nsXFormsMDGNode* dep_gnode;
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for (PRInt32 i = 0; i < aDependencies->Count(); ++i) {
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dep_domnode = aDependencies->GetNode(i);
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if (!dep_domnode) {
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return NS_ERROR_NULL_POINTER;
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}
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dep_gnode = GetNode(dep_domnode, (ModelItemPropName) aType);
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if (!dep_gnode) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (aType == aType && dep_gnode->mContextNode == aContextNode) {
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// Reference to itself, ignore
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continue;
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}
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dep_gnode->mSuc.AppendElement(newnode);
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newnode->mCount++;
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}
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}
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return NS_OK;
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}
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nsresult
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nsXFormsMDGEngine::MarkNodeAsChanged(nsIDOMNode* aContextNode)
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{
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nsXFormsNodeState* ns = GetNCNodeState(aContextNode);
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NS_ENSURE_TRUE(ns, NS_ERROR_FAILURE);
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ns->Set(kFlags_ALL_DISPATCH, PR_TRUE);
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// Get the node, eMode_type == get any type of node
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nsXFormsMDGNode* n = GetNode(aContextNode, eModel_type, PR_FALSE);
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if (n) {
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while (n) {
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n->MarkDirty();
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n = n->mNext;
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}
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} else {
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// Add constraint to trigger validation of node
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n = GetNode(aContextNode, eModel_constraint, PR_TRUE);
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if (!n) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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n->MarkDirty();
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NS_ENSURE_TRUE(mGraph.AppendElement(n), NS_ERROR_OUT_OF_MEMORY);
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}
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NS_ENSURE_TRUE(mMarkedNodes.AddNode(aContextNode), NS_ERROR_FAILURE);
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return NS_OK;
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}
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#ifdef DEBUG_beaufour
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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void
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nsXFormsMDGEngine::PrintDot(const char* aFile)
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{
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FILE *FD = stdout;
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if (aFile) {
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FD = fopen(aFile, "w");
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}
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fprintf(FD, "digraph {\n");
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for (PRInt32 i = 0; i < mGraph.Count(); ++i) {
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nsXFormsMDGNode* g = NS_STATIC_CAST(nsXFormsMDGNode*, mGraph[i]);
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if (g) {
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nsAutoString domNodeName;
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g->mContextNode->GetNodeName(domNodeName);
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if (g->IsDirty()) {
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fprintf(FD, "\t%s [color=red];\n",
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NS_ConvertUCS2toUTF8(domNodeName).get());
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}
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for (PRInt32 j = 0; j < g->mSuc.Count(); ++j) {
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nsXFormsMDGNode* sucnode = NS_STATIC_CAST(nsXFormsMDGNode*,
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g->mSuc[j]);
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if (sucnode) {
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nsAutoString sucName;
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sucnode->mContextNode->GetNodeName(sucName);
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fprintf(FD, "\t%s -> %s [label=\"%s\"];\n",
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NS_ConvertUCS2toUTF8(sucName).get(),
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NS_ConvertUCS2toUTF8(domNodeName).get(),
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gMIPNames[sucnode->mType]);
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}
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}
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}
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}
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fprintf(FD, "}\n");
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if (FD) {
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fclose(FD);
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}
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}
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#endif
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nsresult
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nsXFormsMDGEngine::Recalculate(nsXFormsMDGSet* aChangedNodes)
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{
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NS_ENSURE_ARG(aChangedNodes);
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#ifdef DEBUG_XF_MDG
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printf("nsXFormsMDGEngine::Recalculcate(aChangedNodes=|%d|)\n",
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aChangedNodes->Count());
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#endif
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NS_ENSURE_TRUE(aChangedNodes->AddSet(mMarkedNodes), NS_ERROR_OUT_OF_MEMORY);
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mMarkedNodes.Clear();
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PRBool res = PR_TRUE;
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mFirstCalculate = mJustRebuilt;
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#ifdef DEBUG_XF_MDG
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printf("\taChangedNodes: %d\n", aChangedNodes->Count());
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printf("\tmNodeToMDG: %d\n", mNodeToMDG.Count());
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printf("\tmNodeStates: %d\n", mNodeStates.Count());
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printf("\tGraph nodes: %d\n", mGraph.Count());
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#endif
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// Go through all dirty nodes in the graph
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nsresult rv;
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nsXFormsMDGNode* g;
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for (PRInt32 i = 0; i < mGraph.Count(); ++i) {
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g = NS_STATIC_CAST(nsXFormsMDGNode*, mGraph[i]);
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if (!g) {
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NS_WARNING("nsXFormsMDGEngine::Calculcate(): Empty node in graph!!!");
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continue;
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}
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NS_ASSERTION(g->mCount == 0,
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"nsXFormsMDGEngine::Calculcate(): Graph node with mCount != 0");
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#ifdef DEBUG_XF_MDG
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nsAutoString domNodeName;
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g->mContextNode->GetNodeName(domNodeName);
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printf("\tNode #%d: This=%p, Dirty=%d, DynFunc=%d, Type=%d, Count=%d, Suc=%d, CSize=%d, CPos=%d, Next=%p, domnode=%s\n",
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i, (void*) g, g->IsDirty(), g->mDynFunc, g->mType,
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g->mCount, g->mSuc.Count(), g->mContextSize, g->mContextPosition,
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(void*) g->mNext, NS_ConvertUCS2toUTF8(domNodeName).get());
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#endif
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// Ignore node if it is not dirty
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if (!g->IsDirty()) {
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continue;
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}
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nsXFormsNodeState* ns = GetNCNodeState(g->mContextNode);
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NS_ENSURE_TRUE(ns, NS_ERROR_FAILURE);
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PRBool constraint = PR_TRUE;
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// Find MIP-type and handle it accordingly
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switch (g->mType) {
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case eModel_calculate:
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if (g->HasExpr()) {
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nsISupports* retval;
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rv = g->mExpression->Evaluate(g->mContextNode,
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nsIDOMXPathResult::STRING_TYPE,
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nsnull,
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&retval);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIDOMXPathResult> xpath_res = do_QueryInterface(retval);
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NS_ENSURE_TRUE(xpath_res, NS_ERROR_OUT_OF_MEMORY);
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nsAutoString nodeval;
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rv = xpath_res->GetStringValue(nodeval);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = SetNodeValue(g->mContextNode, nodeval, PR_FALSE, nsnull);
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if (NS_SUCCEEDED(rv)) {
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NS_ENSURE_TRUE(aChangedNodes->AddNode(g->mContextNode),
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NS_ERROR_FAILURE);
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}
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}
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ns->Set(eFlag_DISPATCH_VALUE_CHANGED, PR_TRUE);
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break;
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case eModel_constraint:
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if (g->HasExpr()) {
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rv = BooleanExpression(g, constraint);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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///
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/// @todo Schema validity should be checked here (XXX)
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if (ns->IsConstraint() != constraint) {
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ns->Set(eFlag_CONSTRAINT, constraint);
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ns->Set(eFlag_DISPATCH_VALID_CHANGED, PR_TRUE);
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NS_ENSURE_TRUE(aChangedNodes->AddNode(g->mContextNode),
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NS_ERROR_FAILURE);
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}
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break;
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case eModel_readonly:
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if (g->HasExpr()) {
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rv = ComputeMIPWithInheritance(eFlag_READONLY,
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eFlag_DISPATCH_READONLY_CHANGED,
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eFlag_INHERITED_READONLY,
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g,
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aChangedNodes);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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break;
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case eModel_relevant:
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if (g->HasExpr()) {
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rv = ComputeMIPWithInheritance(eFlag_RELEVANT,
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eFlag_DISPATCH_RELEVANT_CHANGED,
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eFlag_INHERITED_RELEVANT,
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g,
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aChangedNodes);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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break;
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case eModel_required:
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if (g->HasExpr()) {
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PRBool didChange;
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rv = ComputeMIP(eFlag_REQUIRED,
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eFlag_DISPATCH_REQUIRED_CHANGED,
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g,
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didChange);
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NS_ENSURE_SUCCESS(rv, rv);
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if (didChange) {
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NS_ENSURE_TRUE(aChangedNodes->AddNode(g->mContextNode),
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NS_ERROR_FAILURE);
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}
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}
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break;
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default:
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NS_ERROR("There was no expression which matched\n");
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res = PR_FALSE;
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break;
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}
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// Mark successors dirty
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nsXFormsMDGNode* sucnode;
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for (PRInt32 j = 0; j < g->mSuc.Count(); ++j) {
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sucnode = NS_STATIC_CAST(nsXFormsMDGNode*, g->mSuc[j]);
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if (!sucnode) {
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NS_ERROR("nsXFormsMDGEngine::Calculate(): Node has NULL successor!");
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return NS_ERROR_FAILURE;
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}
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sucnode->MarkDirty();
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}
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g->MarkClean();
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}
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aChangedNodes->MakeUnique();
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#ifdef DEBUG_XF_MDG
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printf("\taChangedNodes: %d\n", aChangedNodes->Count());
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printf("\tmNodeToMDG: %d\n", mNodeToMDG.Count());
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printf("\tmNodeStates: %d\n", mNodeStates.Count());
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printf("\tGraph nodes: %d\n", mGraph.Count());
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#endif
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return res;
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}
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nsresult
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nsXFormsMDGEngine::Rebuild()
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{
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#ifdef DEBUG_XF_MDG
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printf("nsXFormsMDGEngine::Rebuild()\n");
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#endif
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nsresult rv = NS_OK;
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mJustRebuilt = PR_TRUE;
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mFirstCalculate = PR_FALSE;
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mGraph.Clear();
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mNodeStates.Clear();
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nsDeque sortedNodes(nsnull);
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#ifdef DEBUG_XF_MDG
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printf("\tmNodesInGraph: %d\n", mNodesInGraph);
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printf("\tmNodeToMDG: %d\n", mNodeToMDG.Count());
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printf("\tmNodeStates: %d\n", mNodeStates.Count());
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#endif
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// Initial scan for nsXFormsMDGNodes with no dependencies (mCount == 0)
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PRUint32 entries = mNodeToMDG.EnumerateRead(AddStartNodes, &sortedNodes);
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if (entries != mNodeToMDG.Count()) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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#ifdef DEBUG_XF_MDG
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printf("\tStartNodes: %d\n", sortedNodes.GetSize());
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#endif
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nsXFormsMDGNode* node;
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while ((node = NS_STATIC_CAST(nsXFormsMDGNode*, sortedNodes.Pop()))) {
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for (PRInt32 i = 0; i < node->mSuc.Count(); ++i) {
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nsXFormsMDGNode* sucNode = NS_STATIC_CAST(nsXFormsMDGNode*,
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node->mSuc[i]);
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NS_ASSERTION(sucNode, "XForms: NULL successor node");
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sucNode->mCount--;
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if (sucNode->mCount == 0) {
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sortedNodes.Push(sucNode);
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}
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}
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node->MarkDirty();
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if (!mGraph.AppendElement(node)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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if (mGraph.Count() != mNodesInGraph) {
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|
NS_WARNING("XForms: There are loops in the MDG\n");
|
|
rv = NS_ERROR_ABORT;
|
|
}
|
|
|
|
mNodesInGraph = 0;
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::ClearDispatchFlags()
|
|
{
|
|
mJustRebuilt = PR_FALSE;
|
|
return AndFlags(kFlags_NOT_DISPATCH) ? NS_OK : NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::Clear() {
|
|
#ifdef DEBUG_XF_MDG
|
|
printf("nsXFormsMDGEngine::Clear()\n");
|
|
#endif
|
|
|
|
nsresult rv = mNodeToMDG.Enumerate(DeleteLinkedNodes, nsnull);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mNodeToMDG.Clear();
|
|
|
|
mNodeStates.Clear();
|
|
|
|
mGraph.Clear();
|
|
|
|
mNodesInGraph = 0;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::GetNodeValue(nsIDOMNode *aContextNode,
|
|
nsAString &aNodeValue)
|
|
{
|
|
nsresult rv;
|
|
nsCOMPtr<nsIDOMNode> childNode;
|
|
|
|
PRUint16 nodeType;
|
|
rv = aContextNode->GetNodeType(&nodeType);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
switch(nodeType) {
|
|
case nsIDOMNode::ATTRIBUTE_NODE:
|
|
case nsIDOMNode::TEXT_NODE:
|
|
case nsIDOMNode::CDATA_SECTION_NODE:
|
|
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
|
|
case nsIDOMNode::COMMENT_NODE:
|
|
rv = aContextNode->GetNodeValue(aNodeValue);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
break;
|
|
|
|
case nsIDOMNode::ELEMENT_NODE:
|
|
rv = aContextNode->GetFirstChild(getter_AddRefs(childNode));
|
|
if (NS_FAILED(rv) || !childNode) {
|
|
// No child
|
|
aNodeValue.Truncate(0);
|
|
} else {
|
|
PRUint16 childType;
|
|
rv = childNode->GetNodeType(&childType);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if ( childType == nsIDOMNode::TEXT_NODE
|
|
|| childType == nsIDOMNode::CDATA_SECTION_NODE) {
|
|
rv = childNode->GetNodeValue(aNodeValue);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
// Not a text child
|
|
aNodeValue.Truncate(0);
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/// Asked for a node which cannot have a text child
|
|
/// @todo Should return more specific error? (XXX)
|
|
return NS_ERROR_ILLEGAL_VALUE;
|
|
break;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::SetNodeValue(nsIDOMNode *aContextNode,
|
|
const nsAString &aNodeValue,
|
|
PRBool aMarkNode,
|
|
PRBool *aNodeChanged)
|
|
{
|
|
if (aNodeChanged) {
|
|
*aNodeChanged = PR_FALSE;
|
|
}
|
|
|
|
const nsXFormsNodeState* ns = GetNodeState(aContextNode);
|
|
NS_ENSURE_TRUE(ns, NS_ERROR_FAILURE);
|
|
|
|
if (ns->IsReadonly()) {
|
|
///
|
|
/// @todo Better feedback for readonly nodes? (XXX)
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIDOMNode> childNode;
|
|
PRUint16 nodeType;
|
|
nsresult rv = aContextNode->GetNodeType(&nodeType);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsAutoString oldValue;
|
|
rv = GetNodeValue(aContextNode, oldValue);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (oldValue.Equals(aNodeValue)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
switch(nodeType) {
|
|
case nsIDOMNode::ATTRIBUTE_NODE:
|
|
case nsIDOMNode::TEXT_NODE:
|
|
case nsIDOMNode::CDATA_SECTION_NODE:
|
|
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
|
|
case nsIDOMNode::COMMENT_NODE:
|
|
rv = aContextNode->SetNodeValue(aNodeValue);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
break;
|
|
|
|
case nsIDOMNode::ELEMENT_NODE:
|
|
rv = aContextNode->GetFirstChild(getter_AddRefs(childNode));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (!childNode) {
|
|
rv = CreateNewChild(aContextNode, aNodeValue);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
PRUint16 childType;
|
|
rv = childNode->GetNodeType(&childType);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if ( childType == nsIDOMNode::TEXT_NODE
|
|
|| childType == nsIDOMNode::CDATA_SECTION_NODE) {
|
|
rv = childNode->SetNodeValue(aNodeValue);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
// Not a text child, create a new one
|
|
rv = CreateNewChild(aContextNode, aNodeValue, childNode);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/// Unsupported nodeType
|
|
/// @todo Should return more specific error? (XXX)
|
|
return NS_ERROR_ILLEGAL_VALUE;
|
|
break;
|
|
}
|
|
|
|
// NB: Never reached for Readonly nodes.
|
|
if (aNodeChanged) {
|
|
*aNodeChanged = PR_TRUE;
|
|
}
|
|
if (aMarkNode) {
|
|
MarkNodeAsChanged(aContextNode);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
const nsXFormsNodeState*
|
|
nsXFormsMDGEngine::GetNodeState(nsIDOMNode *aContextNode)
|
|
{
|
|
return GetNCNodeState(aContextNode);
|
|
}
|
|
|
|
/**********************************************/
|
|
/* Private functions */
|
|
/**********************************************/
|
|
nsXFormsNodeState*
|
|
nsXFormsMDGEngine::GetNCNodeState(nsIDOMNode *aContextNode)
|
|
{
|
|
nsXFormsNodeState* ns = nsnull;
|
|
|
|
if (aContextNode && !mNodeStates.Get(aContextNode, &ns)) {
|
|
ns = new nsXFormsNodeState(kFlags_DEFAULT |
|
|
((mJustRebuilt && mFirstCalculate) ? kFlags_INITIAL_DISPATCH : 0));
|
|
NS_ASSERTION(ns, "Could not create new nsXFormsNodeState");
|
|
|
|
if (!mNodeStates.Put(aContextNode, ns)) {
|
|
NS_ERROR("Could not insert new nsXFormsNodeState");
|
|
delete ns;
|
|
return nsnull;
|
|
}
|
|
aContextNode->AddRef();
|
|
}
|
|
return ns;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::CreateNewChild(nsIDOMNode *aContextNode,
|
|
const nsAString &aNodeValue,
|
|
nsIDOMNode *aBeforeNode)
|
|
{
|
|
nsresult rv;
|
|
|
|
nsCOMPtr<nsIDOMDocument> document;
|
|
rv = aContextNode->GetOwnerDocument(getter_AddRefs(document));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIDOMText> textNode;
|
|
rv = document->CreateTextNode(aNodeValue, getter_AddRefs(textNode));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIDOMNode> newNode;
|
|
if (aBeforeNode) {
|
|
rv = aContextNode->InsertBefore(textNode,
|
|
aBeforeNode,
|
|
getter_AddRefs(newNode));
|
|
} else {
|
|
rv = aContextNode->AppendChild(textNode,
|
|
getter_AddRefs(newNode));
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
PLDHashOperator
|
|
nsXFormsMDGEngine::DeleteLinkedNodes(nsISupports *aKey,
|
|
nsAutoPtr<nsXFormsMDGNode> &aNode,
|
|
void *aArg)
|
|
{
|
|
if (!aNode) {
|
|
NS_WARNING("nsXFormsMDGEngine::DeleteLinkedNodes() called with aNode == nsnull!");
|
|
return PL_DHASH_STOP;
|
|
}
|
|
nsXFormsMDGNode* temp;
|
|
nsXFormsMDGNode* next = aNode->mNext;
|
|
|
|
while (next) {
|
|
temp = next;
|
|
next = next->mNext;
|
|
delete temp;
|
|
}
|
|
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
nsXFormsMDGNode*
|
|
nsXFormsMDGEngine::GetNode(nsIDOMNode *aDomNode,
|
|
ModelItemPropName aType,
|
|
PRBool aCreate)
|
|
{
|
|
nsIDOMNode* nodeKey = aDomNode;
|
|
nsXFormsMDGNode* nd = nsnull;
|
|
|
|
#ifdef DEBUG_XF_MDG
|
|
printf("nsXFormsMDGEngine::GetNode(aDomNode=%p, aType=%s, aCreate=%d)\n",
|
|
(void*) nodeKey, gMIPNames[aType], aCreate);
|
|
#endif
|
|
|
|
|
|
// Find correct type
|
|
if (mNodeToMDG.Get(nodeKey, &nd) && aType != eModel_type) {
|
|
while (nd && aType != nd->mType) {
|
|
nd = nd->mNext;
|
|
}
|
|
}
|
|
|
|
// Eventually create node
|
|
if (!nd && aCreate){
|
|
nd = new nsXFormsMDGNode(nodeKey, aType);
|
|
if (!nd) {
|
|
NS_ERROR("Could not allocate room for new nsXFormsMDGNode");
|
|
return nsnull;
|
|
}
|
|
|
|
#ifdef DEBUG_XF_MDG
|
|
printf("\tNode not found, create new MDGNode '%p'\n", (void*) nd);
|
|
#endif
|
|
// Link to existing node
|
|
nsXFormsMDGNode* nd_exists;
|
|
if (mNodeToMDG.Get(nodeKey, &nd_exists)) {
|
|
while (nd_exists->mNext) {
|
|
nd_exists = nd_exists->mNext;
|
|
}
|
|
#ifdef DEBUG_XF_MDG
|
|
printf("\tLinking to existing MDGNode '%p'\n", (void*) nd_exists);
|
|
#endif
|
|
nd_exists->mNext = nd;
|
|
} else {
|
|
if (!mNodeToMDG.Put(nodeKey, nd)) {
|
|
delete nd;
|
|
NS_ERROR("Could not insert new node in HashTable!");
|
|
return nsnull;
|
|
}
|
|
nodeKey->AddRef();
|
|
}
|
|
|
|
mNodesInGraph++;
|
|
}
|
|
return nd;
|
|
}
|
|
|
|
PLDHashOperator
|
|
nsXFormsMDGEngine::AddStartNodes(nsISupports *aKey,
|
|
nsXFormsMDGNode *aNode,
|
|
void *aDeque)
|
|
{
|
|
#ifdef DEBUG_XF_MDG
|
|
printf("nsXFormsMDGEngine::AddStartNodes(aKey=n/a, aNode=%p, aDeque=%p)\n",
|
|
(void*) aNode,
|
|
aDeque);
|
|
#endif
|
|
|
|
nsDeque* deque = NS_STATIC_CAST(nsDeque*, aDeque);
|
|
if (!deque) {
|
|
NS_ERROR("nsXFormsMDGEngine::AddStartNodes called with NULL aDeque");
|
|
return PL_DHASH_STOP;
|
|
}
|
|
|
|
while (aNode) {
|
|
if (aNode->mCount == 0) {
|
|
///
|
|
/// @todo Is it not possible to check error condition? (XXX)
|
|
deque->Push(aNode);
|
|
}
|
|
aNode = aNode->mNext;
|
|
}
|
|
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
PLDHashOperator
|
|
nsXFormsMDGEngine::AndFlag(nsISupports *aKey,
|
|
nsAutoPtr<nsXFormsNodeState> &aState,
|
|
void *aMask)
|
|
{
|
|
PRUint16* andMask = NS_STATIC_CAST(PRUint16*, aMask);
|
|
if (!andMask) {
|
|
return PL_DHASH_STOP;
|
|
}
|
|
*aState &= *andMask;
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
PRBool
|
|
nsXFormsMDGEngine::AndFlags(PRUint16 aAndMask)
|
|
{
|
|
PRUint32 entries = mNodeStates.Enumerate(AndFlag, &aAndMask);
|
|
return (entries == mNodeStates.Count()) ? PR_TRUE : PR_FALSE;
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::BooleanExpression(nsXFormsMDGNode* aNode, PRBool& state)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aNode);
|
|
NS_ENSURE_TRUE(aNode->mExpression, NS_ERROR_FAILURE);
|
|
|
|
/// @todo Use aNode->contextPosition and aNode->contextSize (XXX)
|
|
/// @see https://bugzilla.mozilla.org/show_bug.cgi?id=265460
|
|
nsISupports* retval;
|
|
nsresult rv;
|
|
|
|
rv = aNode->mExpression->Evaluate(aNode->mContextNode,
|
|
nsIDOMXPathResult::BOOLEAN_TYPE,
|
|
nsnull,
|
|
&retval);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIDOMXPathResult> xpath_res = do_QueryInterface(retval);
|
|
NS_ENSURE_TRUE(xpath_res, NS_ERROR_FAILURE);
|
|
|
|
rv = xpath_res->GetBooleanValue(&state);
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::ComputeMIP(eFlag_t aStateFlag,
|
|
eFlag_t aDispatchFlag,
|
|
nsXFormsMDGNode *aNode,
|
|
PRBool &aDidChange)
|
|
{
|
|
NS_ENSURE_ARG(aNode);
|
|
|
|
aDidChange = PR_FALSE;
|
|
|
|
if (!aNode->mExpression)
|
|
return NS_OK;
|
|
|
|
nsXFormsNodeState* ns = GetNCNodeState(aNode->mContextNode);
|
|
NS_ENSURE_TRUE(ns, NS_ERROR_FAILURE);
|
|
|
|
PRBool state;
|
|
nsresult rv = BooleanExpression(aNode, state);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
PRBool cstate = ns->Test(aStateFlag);
|
|
|
|
ns->Set(aStateFlag, state);
|
|
|
|
aDidChange = (state != cstate) ? PR_TRUE : PR_FALSE;
|
|
if (aDidChange) {
|
|
ns->Set(aDispatchFlag, PR_TRUE);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::ComputeMIPWithInheritance(eFlag_t aStateFlag,
|
|
eFlag_t aDispatchFlag,
|
|
eFlag_t aInheritanceFlag,
|
|
nsXFormsMDGNode *aNode,
|
|
nsXFormsMDGSet *aSet)
|
|
{
|
|
nsresult rv;
|
|
PRBool didChange;
|
|
rv = ComputeMIP(aStateFlag, aDispatchFlag, aNode, didChange);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (didChange) {
|
|
nsXFormsNodeState* ns = GetNCNodeState(aNode->mContextNode);
|
|
NS_ENSURE_TRUE(ns, NS_ERROR_FAILURE);
|
|
if ( !(aStateFlag == eFlag_READONLY && ns->Test(aInheritanceFlag))
|
|
|| (aStateFlag == eFlag_RELEVANT && ns->Test(aInheritanceFlag)) )
|
|
{
|
|
NS_ENSURE_TRUE(aSet->AddNode(aNode->mContextNode),
|
|
NS_ERROR_FAILURE);
|
|
rv = AttachInheritance(aSet,
|
|
aNode->mContextNode,
|
|
ns->Test(aStateFlag),
|
|
aStateFlag);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::AttachInheritance(nsXFormsMDGSet *aSet,
|
|
nsIDOMNode *aSrc,
|
|
PRBool aState,
|
|
eFlag_t aStateFlag)
|
|
{
|
|
NS_ENSURE_ARG(aSrc);
|
|
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
nsresult rv;
|
|
PRBool updateNode = PR_FALSE;
|
|
|
|
nsCOMPtr<nsIDOMNodeList> childList;
|
|
rv = aSrc->GetChildNodes(getter_AddRefs(childList));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
PRUint32 childCount;
|
|
rv = childList->GetLength(&childCount);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
for (PRUint32 i = 0; i < childCount; i++) {
|
|
rv = childList->Item(i, getter_AddRefs(node));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ENSURE_TRUE(node, NS_ERROR_FAILURE);
|
|
|
|
nsXFormsNodeState *ns = GetNCNodeState(node);
|
|
NS_ENSURE_TRUE(ns, NS_ERROR_FAILURE);
|
|
|
|
PRBool curState = ns->Test(aStateFlag);
|
|
|
|
if (aStateFlag == eFlag_RELEVANT) {
|
|
if (!aState) { // The nodes are getting irrelevant
|
|
if (ns->Test(eFlag_INHERITED_RELEVANT) && curState) {
|
|
ns->Set(eFlag_INHERITED_RELEVANT, PR_FALSE);
|
|
ns->Set(eFlag_DISPATCH_RELEVANT_CHANGED, PR_TRUE);
|
|
updateNode = PR_TRUE;
|
|
}
|
|
} else { // The nodes are becoming relevant
|
|
if (curState) {
|
|
// Relevant has changed from inheritance
|
|
ns->Set(eFlag_DISPATCH_RELEVANT_CHANGED, PR_TRUE);
|
|
ns->Set(eFlag_INHERITED_RELEVANT, PR_TRUE);
|
|
updateNode = PR_TRUE;
|
|
}
|
|
}
|
|
} else if (aStateFlag == eFlag_READONLY) {
|
|
if (aState) { // The nodes are getting readonly
|
|
if (!ns->Test(eFlag_INHERITED_READONLY) && curState == PR_FALSE) {
|
|
ns->Set(eFlag_INHERITED_READONLY | eFlag_DISPATCH_READONLY_CHANGED,
|
|
PR_TRUE);
|
|
updateNode = PR_TRUE;
|
|
}
|
|
} else { // The nodes are getting readwrite
|
|
if (curState) {
|
|
ns->Set(eFlag_DISPATCH_READONLY_CHANGED, PR_TRUE);
|
|
ns->Set(eFlag_INHERITED_READONLY, PR_FALSE);
|
|
updateNode = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (updateNode) {
|
|
rv = AttachInheritance(aSet, node, aState, aStateFlag);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ENSURE_TRUE(aSet->AddNode(node), NS_ERROR_FAILURE);
|
|
updateNode = PR_FALSE;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsXFormsMDGEngine::Invalidate()
|
|
{
|
|
nsXFormsMDGNode* g;
|
|
for (PRInt32 i = 0; i < mGraph.Count(); ++i) {
|
|
g = NS_STATIC_CAST(nsXFormsMDGNode*, mGraph[i]);
|
|
NS_ENSURE_TRUE(g, NS_ERROR_FAILURE);
|
|
g->MarkDirty();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|