gecko-dev/layout/generic/nsFrameUtil.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (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/NPL/
*
* 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 Netscape are Copyright (C) 1998
* Netscape Communications Corporation. All Rights Reserved.
*/
#include "nsIFrameUtil.h"
#include "nsFrame.h"
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#include "nsHTMLEntities.h"
#include "nsString.h"
#include "nsRect.h"
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#include "stdlib.h"
#include "plstr.h"
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static NS_DEFINE_IID(kIFrameUtilIID, NS_IFRAME_UTIL_IID);
class nsFrameUtil : public nsIFrameUtil {
public:
nsFrameUtil();
virtual ~nsFrameUtil();
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NS_DECL_ISUPPORTS
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NS_IMETHOD CompareRegressionData(FILE* aFile1, FILE* aFile2);
NS_IMETHOD DumpRegressionData(FILE* aInputFile, FILE* aOutputFile);
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struct Node;
struct Tag;
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struct NodeList {
NodeList();
~NodeList();
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static void Destroy(NodeList* aLists);
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NodeList* next; // for lists of lists
Node* node;
char* name;
};
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struct Node {
Node();
~Node();
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static void Destroy(Node* aNode);
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static Node* Read(FILE* aFile, Tag* aTag);
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static Node* ReadTree(FILE* aFile);
Node* next;
char* type;
PRUint32 state;
nsRect bbox;
NodeList* lists;
};
struct Tag {
Tag();
~Tag();
static Tag* Parse(FILE* aFile);
void AddAttr(char* aAttr, char* aValue);
char* GetAttr(char* aAttr);
void ReadAttrs(FILE* aFile);
void ToString(nsString& aResult);
enum Type {
open,
close,
openClose
};
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char* name;
Type type;
char** attributes;
PRInt32 num;
PRInt32 size;
char** values;
};
static char* Copy(char* aString);
static void DumpNode(Node* aNode, FILE* aOutputFile, PRInt32 aIndent);
static void DumpTree(Node* aNode, FILE* aOutputFile, PRInt32 aIndent);
static PRBool CompareTrees(Node* aNode1, Node* aNode2);
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};
char*
nsFrameUtil::Copy(char* aString)
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{
if (aString) {
int l = ::strlen(aString);
char* c = new char[l+1];
memcpy(c, aString, l+1);
return c;
}
return aString;
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}
//----------------------------------------------------------------------
nsFrameUtil::NodeList::NodeList()
: next(nsnull), node(nsnull), name(nsnull)
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{
}
nsFrameUtil::NodeList::~NodeList()
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{
if (nsnull != name) {
delete name;
}
if (nsnull != node) {
Node::Destroy(node);
}
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}
void
nsFrameUtil::NodeList::Destroy(NodeList* aLists)
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{
while (nsnull != aLists) {
NodeList* next = aLists->next;
delete aLists;
aLists = next;
}
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}
//----------------------------------------------------------------------
nsFrameUtil::Node::Node()
: next(nsnull), type(nsnull), state(0), lists(nsnull)
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{
}
nsFrameUtil::Node::~Node()
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{
if (nsnull != type) {
delete type;
}
if (nsnull != lists) {
NodeList::Destroy(lists);
}
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}
void
nsFrameUtil::Node::Destroy(Node* aList)
{
while (nsnull != aList) {
Node* next = aList->next;
delete aList;
aList = next;
}
}
static PRInt32 GetInt(nsFrameUtil::Tag* aTag, char* aAttr)
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{
char* value = aTag->GetAttr(aAttr);
if (nsnull != value) {
return PRInt32( atoi(value) );
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}
return 0;
}
nsFrameUtil::Node*
nsFrameUtil::Node::ReadTree(FILE* aFile)
{
Tag* tag = Tag::Parse(aFile);
if (nsnull == tag) {
return nsnull;
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}
if (PL_strcmp(tag->name, "frame") != 0) {
delete tag;
return nsnull;
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}
Node* result = Read(aFile, tag);
fclose(aFile);
return result;
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}
nsFrameUtil::Node*
nsFrameUtil::Node::Read(FILE* aFile, Tag* tag)
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{
Node* node = new Node;
node->type = Copy(tag->GetAttr("type"));
node->state = GetInt(tag, "state");
delete tag;
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for (;;) {
tag = Tag::Parse(aFile);
if (nsnull == tag) break;
if (PL_strcmp(tag->name, "frame") == 0) {
delete tag;
break;
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}
if (PL_strcmp(tag->name, "bbox") == 0) {
nscoord x = nscoord( GetInt(tag, "x") );
nscoord y = nscoord( GetInt(tag, "y") );
nscoord w = nscoord( GetInt(tag, "w") );
nscoord h = nscoord( GetInt(tag, "h") );
node->bbox.SetRect(x, y, w, h);
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}
else if (PL_strcmp(tag->name, "child-list") == 0) {
NodeList* list = new NodeList();
list->name = Copy(tag->GetAttr("name"));
list->next = node->lists;
node->lists = list;
delete tag;
Node** tailp = &list->node;
for (;;) {
tag = Tag::Parse(aFile);
if (nsnull == tag) {
break;
}
if (PL_strcmp(tag->name, "child-list") == 0) {
break;
}
if (PL_strcmp(tag->name, "frame") != 0) {
break;
}
Node* child = Node::Read(aFile, tag);
if (nsnull == child) {
break;
}
*tailp = child;
tailp = &child->next;
}
}
delete tag;
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}
return node;
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}
//----------------------------------------------------------------------
nsFrameUtil::Tag::Tag()
: name(nsnull), type(open), attributes(nsnull), num(0), size(0),
values(nsnull)
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{
}
nsFrameUtil::Tag::~Tag()
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{
PRInt32 i, n = num;
if (0 != n) {
for (i = 0; i < n; i++) {
delete attributes[i];
delete values[i];
}
delete attributes;
delete values;
}
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}
void
nsFrameUtil::Tag::AddAttr(char* aAttr, char* aValue)
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{
if (num == size) {
PRInt32 newSize = size * 2 + 4;
char** a = new char*[newSize];
char** v = new char*[newSize];
if (0 != num) {
memcpy(a, attributes, num * sizeof(char*));
memcpy(v, values, num * sizeof(char*));
delete attributes;
delete values;
}
attributes = a;
values = v;
size = newSize;
}
attributes[num] = aAttr;
values[num] = aValue;
num = num + 1;
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}
char*
nsFrameUtil::Tag::GetAttr(char* aAttr)
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{
PRInt32 i, n = num;
for (i = 0; i < n; i++) {
if (PL_strcmp(attributes[i], aAttr) == 0) {
return values[i];
}
}
return nsnull;
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}
static inline int IsWhiteSpace(int c) {
return (c == ' ') || (c == '\t') || (c == '\n') || (c == '\r');
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}
static PRBool EatWS(FILE* aFile)
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{
for (;;) {
int c = getc(aFile);
if (c < 0) {
return PR_FALSE;
}
if (!IsWhiteSpace(c)) {
ungetc(c, aFile);
break;
}
}
return PR_TRUE;
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}
static PRBool Expect(FILE* aFile, char aChar)
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{
int c = getc(aFile);
if (c < 0) return PR_FALSE;
if (c != aChar) {
ungetc(c, aFile);
return PR_FALSE;
}
return PR_TRUE;
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}
static char* ReadIdent(FILE* aFile)
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{
char id[1000];
char* ip = id;
char* end = ip + sizeof(id) - 1;
while (ip < end) {
int c = fgetc(aFile);
if (c < 0) return nsnull;
if ((c == '=') || (c == '>') || (c == '/') || IsWhiteSpace(c)) {
ungetc(c, aFile);
break;
}
*ip++ = char(c);
}
*ip = '\0';
return nsFrameUtil::Copy(id);
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}
static char* ReadString(FILE* aFile)
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{
if (!Expect(aFile, '\"')) {
return nsnull;
}
char id[1000];
char* ip = id;
char* end = ip + sizeof(id) - 1;
while (ip < end) {
int c = fgetc(aFile);
if (c < 0) return nsnull;
if (c == '\"') {
break;
}
*ip++ = char(c);
}
*ip = '\0';
return nsFrameUtil::Copy(id);
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}
void
nsFrameUtil::Tag::ReadAttrs(FILE* aFile)
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{
for (;;) {
if (!EatWS(aFile)) {
break;
}
int c = getc(aFile);
if (c < 0) break;
if (c == '/') {
if (!EatWS(aFile)) {
return;
}
if (Expect(aFile, '>')) {
type = openClose;
break;
}
}
else if (c == '>') {
break;
}
ungetc(c, aFile);
char* attr = ReadIdent(aFile);
if ((nsnull == attr) || !EatWS(aFile)) {
break;
}
char* value = nsnull;
if (Expect(aFile, '=')) {
value = ReadString(aFile);
if (nsnull == value) {
break;
}
}
AddAttr(attr, value);
}
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}
nsFrameUtil::Tag*
nsFrameUtil::Tag::Parse(FILE* aFile)
{
if (!EatWS(aFile)) {
return nsnull;
}
if (Expect(aFile, '<')) {
Tag* tag = new Tag;
if (Expect(aFile, '/')) {
tag->type = close;
}
else {
tag->type = open;
}
tag->name = ReadIdent(aFile);
tag->ReadAttrs(aFile);
return tag;
}
return nsnull;
}
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void
nsFrameUtil::Tag::ToString(nsString& aResult)
{
aResult.Truncate();
aResult.Append(PRUnichar('<'));
if (type == close) {
aResult.Append(PRUnichar('/'));
}
aResult.Append(name);
if (0 != num) {
PRInt32 i, n = num;
for (i = 0; i < n; i++) {
aResult.Append(PRUnichar(' '));
aResult.Append(attributes[i]);
if (values[i]) {
aResult.Append("=\"");
aResult.Append(values[i]);
aResult.Append('\"');
}
}
}
if (type == openClose) {
aResult.Append(PRUnichar('/'));
}
aResult.Append(PRUnichar('>'));
}
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//----------------------------------------------------------------------
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nsresult NS_NewFrameUtil(nsIFrameUtil** aResult);
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nsresult
NS_NewFrameUtil(nsIFrameUtil** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null pointer");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = nsnull;
nsFrameUtil* it = new nsFrameUtil();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(kIFrameUtilIID, (void**) aResult);
}
nsFrameUtil::nsFrameUtil()
{
NS_INIT_REFCNT();
}
nsFrameUtil::~nsFrameUtil()
{
}
NS_IMPL_ISUPPORTS(nsFrameUtil, kIFrameUtilIID);
void
nsFrameUtil::DumpNode(Node* aNode, FILE* aOutputFile, PRInt32 aIndent)
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{
nsFrame::IndentBy(aOutputFile, aIndent);
fprintf(aOutputFile, "%s 0x%x %d,%d,%d,%d\n", aNode->type, aNode->state,
aNode->bbox.x, aNode->bbox.y,
aNode->bbox.width, aNode->bbox.height);
}
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void
nsFrameUtil::DumpTree(Node* aNode, FILE* aOutputFile, PRInt32 aIndent)
{
while (nsnull != aNode) {
DumpNode(aNode, aOutputFile, aIndent);
nsFrameUtil::NodeList* lists = aNode->lists;
if (nsnull != lists) {
while (nsnull != lists) {
nsFrame::IndentBy(aOutputFile, aIndent);
fprintf(aOutputFile, " list: %s\n",
lists->name ? lists->name : "primary");
DumpTree(lists->node, aOutputFile, aIndent + 1);
lists = lists->next;
}
}
aNode = aNode->next;
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}
}
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PRBool
nsFrameUtil::CompareTrees(Node* tree1, Node* tree2)
{
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for (;;) {
// Make sure both nodes are non-null, or at least agree with each other
if (nsnull == tree1) {
if (nsnull == tree2) {
break;
}
printf("first tree prematurely ends\n");
return PR_FALSE;
}
else if (nsnull == tree2) {
printf("second tree prematurely ends\n");
return PR_FALSE;
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}
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// Check the attributes that we care about
if (0 != PL_strcmp(tree1->type, tree2->type)) {
printf("frame type mismatch: %s vs. %s\n", tree1->type, tree2->type);
printf("Node 1:\n");
DumpNode(tree1, stdout, 1);
printf("Node 2:\n");
DumpNode(tree2, stdout, 1);
return PR_FALSE;
}
if (tree1->state != tree2->state) {
printf("frame state mismatch: 0x%x vs. 0x%x\n",
tree1->state, tree2->state);
}
if (tree1->bbox != tree2->bbox) {
printf("frame bbox mismatch: %d,%d,%d,%d vs. %d,%d,%d,%d\n",
tree1->bbox.x, tree1->bbox.y,
tree1->bbox.width, tree1->bbox.height,
tree2->bbox.x, tree2->bbox.y,
tree2->bbox.width, tree2->bbox.height);
}
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// Check child lists too
NodeList* list1 = tree1->lists;
NodeList* list2 = tree2->lists;
for (;;) {
if (nsnull == list1) {
if (nsnull != list2) {
printf("first tree prematurely ends (no child lists)\n");
printf("Node 1:\n");
DumpNode(tree1, stdout, 1);
printf("Node 2:\n");
DumpNode(tree2, stdout, 1);
return PR_FALSE;
}
else {
break;
}
}
if (nsnull == list2) {
printf("second tree prematurely ends (no child lists)\n");
printf("Node 1:\n");
DumpNode(tree1, stdout, 1);
printf("Node 2:\n");
DumpNode(tree2, stdout, 1);
return PR_FALSE;
}
if (0 != PL_strcmp(list1->name, list2->name)) {
printf("child-list name mismatch: %s vs. %s\n",
list1->name ? list1->name : "(null)",
list2->name ? list2->name : "(null)");
}
else {
PRBool equiv = CompareTrees(list1->node, list2->node);
if (!equiv) {
return equiv;
}
}
list1 = list1->next;
list2 = list2->next;
}
// Check siblings next
tree1 = tree1->next;
tree2 = tree2->next;
}
return PR_TRUE;
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}
NS_IMETHODIMP
nsFrameUtil::CompareRegressionData(FILE* aFile1, FILE* aFile2)
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{
Node* tree1 = Node::ReadTree(aFile1);
Node* tree2 = Node::ReadTree(aFile2);
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nsresult rv = NS_OK;
if (!CompareTrees(tree1, tree2)) {
printf("Regression data 1:\n");
DumpTree(tree1, stdout, 0);
printf("Regression data 2:\n");
DumpTree(tree2, stdout, 0);
rv = NS_ERROR_FAILURE;
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}
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Node::Destroy(tree1);
Node::Destroy(tree2);
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return rv;
}
NS_IMETHODIMP
nsFrameUtil::DumpRegressionData(FILE* aInputFile, FILE* aOutputFile)
{
Node* tree1 = Node::ReadTree(aInputFile);
if (nsnull != tree1) {
DumpTree(tree1, aOutputFile, 0);
Node::Destroy(tree1);
return NS_OK;
}
return NS_ERROR_FAILURE;
}