summaryrefslogtreecommitdiff
path: root/layout/generic/nsFrameUtil.cpp
blob: e6977b464589cef0d0432f3852542cef04b43c7b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 */
 
#include "nsIFrameUtil.h"
#include "nsFrame.h"
#include "nsString.h"
#include "nsRect.h"
#include <stdlib.h>
#include "plstr.h"


#ifdef DEBUG
class nsFrameUtil : public nsIFrameUtil {
protected:
  virtual ~nsFrameUtil();

public:
  nsFrameUtil();

  NS_DECL_ISUPPORTS

  NS_IMETHOD CompareRegressionData(FILE* aFile1, FILE* aFile2,int32_t aRegressionOutput=0) override;
  NS_IMETHOD DumpRegressionData(FILE* aInputFile, FILE* aOutputFile) override;

  struct Node;
  struct Tag;

  struct NodeList {
    NodeList();
    ~NodeList();

    static void Destroy(NodeList* aLists);

    NodeList* next;            // for lists of lists
    Node* node;
    char* name;
  };

  struct Node {
    Node();
    ~Node();

    static void Destroy(Node* aNode);

    static Node* Read(FILE* aFile, Tag* aTag);

    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
    };

    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);
};

char*
nsFrameUtil::Copy(const char* aString)
{
  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;
}

//----------------------------------------------------------------------

nsFrameUtil::NodeList::NodeList()
  : next(nullptr), node(nullptr), name(nullptr)
{
}

nsFrameUtil::NodeList::~NodeList()
{
  if (nullptr != name) {
    delete name;
  }
  if (nullptr != node) {
    Node::Destroy(node);
  }
}

void
nsFrameUtil::NodeList::Destroy(NodeList* aLists)
{
  while (nullptr != aLists) {
    NodeList* next = aLists->next;
    delete aLists;
    aLists = next;
  }
}

//----------------------------------------------------------------------

nsFrameUtil::Node::Node()
  : next(nullptr), type(nullptr), state(0), lists(nullptr)
{
}

nsFrameUtil::Node::~Node()
{
  if (nullptr != type) {
    delete type;
  }
  if (nullptr != lists) {
    NodeList::Destroy(lists);
  }
}

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)
{
  const char* value = aTag->GetAttr(aAttr);
  if (nullptr != value) {
    return int32_t( atoi(value) );
  }
  return 0;
}

nsFrameUtil::Node*
nsFrameUtil::Node::ReadTree(FILE* aFile)
{
  Tag* tag = Tag::Parse(aFile);
  if (nullptr == tag) {
    return nullptr;
  }
  if (PL_strcmp(tag->name, "frame") != 0) {
    delete tag;
    return nullptr;
  }
  Node* result = Read(aFile, tag);
  fclose(aFile);
  return result;
}

nsFrameUtil::Node*
nsFrameUtil::Node::Read(FILE* aFile, Tag* tag)
{
  Node* node = new Node;
  node->type = Copy(tag->GetAttr("type"));
  if (!node->type) {
    /* crash() */
  }
  node->state = GetInt(tag, "state");
  delete tag;

  for (;;) {
    tag = Tag::Parse(aFile);
    if (nullptr == tag) break;
    if (PL_strcmp(tag->name, "frame") == 0) {
      delete tag;
      break;
    }
    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);
    }
    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;
  }
  return node;
}

//----------------------------------------------------------------------

nsFrameUtil::Tag::Tag()
  : name(nullptr), type(open), attributes(nullptr), num(0), size(0),
    values(nullptr)
{
}

nsFrameUtil::Tag::~Tag()
{
  int32_t i, n = num;
  if (0 != n) {
    for (i = 0; i < n; i++) {
      delete attributes[i];
      delete values[i];
    }
    delete attributes;
    delete values;
  }
}

void
nsFrameUtil::Tag::AddAttr(char* aAttr, char* aValue)
{
  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;
}

const char*
nsFrameUtil::Tag::GetAttr(const char* aAttr)
{
  int32_t i, n = num;
  for (i = 0; i < n; i++) {
    if (PL_strcmp(attributes[i], aAttr) == 0) {
      return values[i];
    }
  }
  return nullptr;
}

static inline int IsWhiteSpace(int c) {
  return (c == ' ') || (c == '\t') || (c == '\n') || (c == '\r');
}

static bool EatWS(FILE* aFile)
{
  for (;;) {
    int c = getc(aFile);
    if (c < 0) {
      return false;
    }
    if (!IsWhiteSpace(c)) {
      ungetc(c, aFile);
      break;
    }
  }
  return true;
}

static bool Expect(FILE* aFile, char aChar)
{
  int c = getc(aFile);
  if (c < 0) return false;
  if (c != aChar) {
    ungetc(c, aFile);
    return false;
  }
  return true;
}

static char* ReadIdent(FILE* aFile)
{
  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 */
}

static char* ReadString(FILE* aFile)
{
  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 */
}

void
nsFrameUtil::Tag::ReadAttrs(FILE* aFile)
{
  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);
  }
}

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;
}

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('>'));
}

//----------------------------------------------------------------------

nsresult
NS_NewFrameUtil(nsIFrameUtil** aResult)
{
  NS_PRECONDITION(nullptr != aResult, "null pointer");
  if (nullptr == aResult) {
    return NS_ERROR_NULL_POINTER;
  }

  nsFrameUtil* it = new nsFrameUtil();

  NS_ADDREF(*aResult = it);
  return NS_OK;
}

nsFrameUtil::nsFrameUtil()
{
}

nsFrameUtil::~nsFrameUtil()
{
}

NS_IMPL_ISUPPORTS(nsFrameUtil, nsIFrameUtil)

void
nsFrameUtil::DumpNode(Node* aNode, FILE* aOutputFile, int32_t aIndent)
{
  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());
}

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;
  }
}

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;
    }

    // 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());
    }

    // 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;
}

NS_IMETHODIMP
nsFrameUtil::CompareRegressionData(FILE* aFile1, FILE* aFile2,int32_t aRegressionOutput)
{
  Node* tree1 = Node::ReadTree(aFile1);
  Node* tree2 = Node::ReadTree(aFile2);

  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;
  }

  Node::Destroy(tree1);
  Node::Destroy(tree2);

  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