gecko-dev/layout/generic/nsFrameUtil.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 15:12:37 +04:00
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* utilities for regression tests based on frame tree comparison */
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#include "nsIFrameUtil.h"
#include "nsFrame.h"
#include "nsString.h"
#include "nsRect.h"
#include <stdlib.h>
#include "plstr.h"
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#ifdef DEBUG
class nsFrameUtil : public nsIFrameUtil {
protected:
virtual ~nsFrameUtil();
public:
nsFrameUtil();
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NS_DECL_ISUPPORTS
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NS_IMETHOD CompareRegressionData(FILE* aFile1, FILE* aFile2,int32_t aRegressionOutput=0) override;
NS_IMETHOD DumpRegressionData(FILE* aInputFile, FILE* aOutputFile) override;
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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;
uint32_t state;
nsRect bbox;
nsCString styleData;
NodeList* lists;
};
struct Tag {
Tag();
~Tag();
static Tag* Parse(FILE* aFile);
void AddAttr(char* aAttr, char* aValue);
const char* GetAttr(const 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;
int32_t num;
int32_t size;
char** values;
};
static char* Copy(const char* aString);
static void DumpNode(Node* aNode, FILE* aOutputFile, int32_t aIndent);
static void DumpTree(Node* aNode, FILE* aOutputFile, int32_t aIndent);
static bool CompareTrees(Node* aNode1, Node* aNode2);
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};
char*
nsFrameUtil::Copy(const char* aString)
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{
if (aString) {
int l = ::strlen(aString);
char* c = new char[l+1];
if (!c)
return nullptr;
memcpy(c, aString, l+1);
return c;
}
return nullptr;
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}
//----------------------------------------------------------------------
nsFrameUtil::NodeList::NodeList()
: next(nullptr), node(nullptr), name(nullptr)
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{
}
nsFrameUtil::NodeList::~NodeList()
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{
if (nullptr != name) {
delete name;
}
if (nullptr != node) {
Node::Destroy(node);
}
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}
void
nsFrameUtil::NodeList::Destroy(NodeList* aLists)
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{
while (nullptr != aLists) {
NodeList* next = aLists->next;
delete aLists;
aLists = next;
}
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}
//----------------------------------------------------------------------
nsFrameUtil::Node::Node()
: next(nullptr), type(nullptr), state(0), lists(nullptr)
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{
}
nsFrameUtil::Node::~Node()
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{
if (nullptr != type) {
delete type;
}
if (nullptr != lists) {
NodeList::Destroy(lists);
}
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}
void
nsFrameUtil::Node::Destroy(Node* aList)
{
while (nullptr != aList) {
Node* next = aList->next;
delete aList;
aList = next;
}
}
static int32_t GetInt(nsFrameUtil::Tag* aTag, const char* aAttr)
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{
const char* value = aTag->GetAttr(aAttr);
if (nullptr != value) {
return int32_t( atoi(value) );
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}
return 0;
}
nsFrameUtil::Node*
nsFrameUtil::Node::ReadTree(FILE* aFile)
{
Tag* tag = Tag::Parse(aFile);
if (nullptr == tag) {
return nullptr;
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}
if (PL_strcmp(tag->name, "frame") != 0) {
delete tag;
return nullptr;
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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"));
if (!node->type) {
/* crash() */
}
node->state = GetInt(tag, "state");
delete tag;
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for (;;) {
tag = Tag::Parse(aFile);
if (nullptr == 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"));
if (!list->name) {
/* crash() */
}
list->next = node->lists;
node->lists = list;
delete tag;
Node** tailp = &list->node;
for (;;) {
tag = Tag::Parse(aFile);
if (nullptr == 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 (nullptr == child) {
break;
}
*tailp = child;
tailp = &child->next;
}
}
else if((PL_strcmp(tag->name, "font") == 0) ||
(PL_strcmp(tag->name, "color") == 0) ||
(PL_strcmp(tag->name, "spacing") == 0) ||
(PL_strcmp(tag->name, "list") == 0) ||
(PL_strcmp(tag->name, "position") == 0) ||
(PL_strcmp(tag->name, "text") == 0) ||
(PL_strcmp(tag->name, "display") == 0) ||
(PL_strcmp(tag->name, "table") == 0) ||
(PL_strcmp(tag->name, "content") == 0) ||
(PL_strcmp(tag->name, "UI") == 0) ||
(PL_strcmp(tag->name, "print") == 0)) {
const char* attr = tag->GetAttr("data");
node->styleData.Append('|');
node->styleData.Append(attr ? attr : "null attr");
}
delete tag;
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}
return node;
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}
//----------------------------------------------------------------------
nsFrameUtil::Tag::Tag()
: name(nullptr), type(open), attributes(nullptr), num(0), size(0),
values(nullptr)
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{
}
nsFrameUtil::Tag::~Tag()
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{
int32_t 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) {
int32_t 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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}
const char*
nsFrameUtil::Tag::GetAttr(const char* aAttr)
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{
int32_t i, n = num;
for (i = 0; i < n; i++) {
if (PL_strcmp(attributes[i], aAttr) == 0) {
return values[i];
}
}
return nullptr;
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}
static inline int IsWhiteSpace(int c) {
return (c == ' ') || (c == '\t') || (c == '\n') || (c == '\r');
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}
static bool EatWS(FILE* aFile)
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{
for (;;) {
int c = getc(aFile);
if (c < 0) {
return false;
}
if (!IsWhiteSpace(c)) {
ungetc(c, aFile);
break;
}
}
return true;
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}
static bool Expect(FILE* aFile, char aChar)
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{
int c = getc(aFile);
if (c < 0) return false;
if (c != aChar) {
ungetc(c, aFile);
return false;
}
return 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 nullptr;
if ((c == '=') || (c == '>') || (c == '/') || IsWhiteSpace(c)) {
ungetc(c, aFile);
break;
}
*ip++ = char(c);
}
*ip = '\0';
return nsFrameUtil::Copy(id);
/* may return a null pointer */
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}
static char* ReadString(FILE* aFile)
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{
if (!Expect(aFile, '\"')) {
return nullptr;
}
char id[1000];
char* ip = id;
char* end = ip + sizeof(id) - 1;
while (ip < end) {
int c = fgetc(aFile);
if (c < 0) return nullptr;
if (c == '\"') {
break;
}
*ip++ = char(c);
}
*ip = '\0';
return nsFrameUtil::Copy(id);
/* may return a null pointer */
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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 ((nullptr == attr) || !EatWS(aFile)) {
break;
}
char* value = nullptr;
if (Expect(aFile, '=')) {
value = ReadString(aFile);
if (nullptr == value) {
delete [] attr;
break;
}
}
AddAttr(attr, value);
}
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}
nsFrameUtil::Tag*
nsFrameUtil::Tag::Parse(FILE* aFile)
{
if (!EatWS(aFile)) {
return nullptr;
}
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 nullptr;
}
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void
nsFrameUtil::Tag::ToString(nsString& aResult)
{
aResult.Truncate();
aResult.Append(char16_t('<'));
if (type == close) {
aResult.Append(char16_t('/'));
}
aResult.AppendASCII(name);
if (0 != num) {
int32_t i, n = num;
for (i = 0; i < n; i++) {
aResult.Append(char16_t(' '));
aResult.AppendASCII(attributes[i]);
if (values[i]) {
aResult.AppendLiteral("=\"");
aResult.AppendASCII(values[i]);
aResult.Append(char16_t('\"'));
}
}
}
if (type == openClose) {
aResult.Append(char16_t('/'));
}
aResult.Append(char16_t('>'));
}
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//----------------------------------------------------------------------
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nsresult
NS_NewFrameUtil(nsIFrameUtil** aResult)
{
NS_PRECONDITION(nullptr != aResult, "null pointer");
if (nullptr == aResult) {
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return NS_ERROR_NULL_POINTER;
}
nsFrameUtil* it = new nsFrameUtil();
NS_ADDREF(*aResult = it);
return NS_OK;
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}
nsFrameUtil::nsFrameUtil()
{
}
nsFrameUtil::~nsFrameUtil()
{
}
NS_IMPL_ISUPPORTS(nsFrameUtil, nsIFrameUtil)
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void
nsFrameUtil::DumpNode(Node* aNode, FILE* aOutputFile, int32_t aIndent)
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{
nsFrame::IndentBy(aOutputFile, aIndent);
fprintf(aOutputFile, "%s 0x%x %d,%d,%d,%d, %s\n", aNode->type, aNode->state,
aNode->bbox.x, aNode->bbox.y,
aNode->bbox.width, aNode->bbox.height,
aNode->styleData.get());
}
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void
nsFrameUtil::DumpTree(Node* aNode, FILE* aOutputFile, int32_t aIndent)
{
while (nullptr != aNode) {
DumpNode(aNode, aOutputFile, aIndent);
nsFrameUtil::NodeList* lists = aNode->lists;
if (nullptr != lists) {
while (nullptr != 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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bool
nsFrameUtil::CompareTrees(Node* tree1, Node* tree2)
{
bool result = true;
for (;; tree1 = tree1->next, tree2 = tree2->next) {
// Make sure both nodes are non-null, or at least agree with each other
if (nullptr == tree1) {
if (nullptr == tree2) {
break;
}
printf("first tree prematurely ends\n");
return false;
}
else if (nullptr == tree2) {
printf("second tree prematurely ends\n");
return 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 false;
}
// Ignore the XUL scrollbar frames
static const char kScrollbarFrame[] = "ScrollbarFrame";
if (0 == PL_strncmp(tree1->type, kScrollbarFrame, sizeof(kScrollbarFrame) - 1))
continue;
if (tree1->state != tree2->state) {
printf("frame state mismatch: 0x%x vs. 0x%x\n",
tree1->state, tree2->state);
printf("Node 1:\n");
DumpNode(tree1, stdout, 1);
printf("Node 2:\n");
DumpNode(tree2, stdout, 1);
result = false; // we have a non-critical failure, so remember that but continue
}
if (tree1->bbox.IsEqualInterior(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);
printf("Node 1:\n");
DumpNode(tree1, stdout, 1);
printf("Node 2:\n");
DumpNode(tree2, stdout, 1);
result = false; // we have a non-critical failure, so remember that but continue
}
if (tree1->styleData != tree2->styleData) {
printf("frame style data mismatch: %s vs. %s\n",
tree1->styleData.get(),
tree2->styleData.get());
}
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// Check child lists too
NodeList* list1 = tree1->lists;
NodeList* list2 = tree2->lists;
for (;;) {
if (nullptr == list1) {
if (nullptr != 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 false;
}
else {
break;
}
}
if (nullptr == 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 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)");
result = false; // we have a non-critical failure, so remember that but continue
}
else {
bool equiv = CompareTrees(list1->node, list2->node);
if (!equiv) {
return equiv;
}
}
list1 = list1->next;
list2 = list2->next;
}
}
return result;
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}
NS_IMETHODIMP
nsFrameUtil::CompareRegressionData(FILE* aFile1, FILE* aFile2,int32_t aRegressionOutput)
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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)) {
// only output this if aRegressionOutput is 0
if( 0 == aRegressionOutput ){
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 (nullptr != tree1) {
DumpTree(tree1, aOutputFile, 0);
Node::Destroy(tree1);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
#endif