tesseract  5.0.0
werdit.cpp
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1 /**********************************************************************
2  * File: werdit.cpp (Formerly wordit.c)
3  * Description: An iterator for passing over all the words in a document.
4  * Author: Ray Smith
5  * Created: Mon Apr 27 08:51:22 BST 1992
6  *
7  * (C) Copyright 1992, Hewlett-Packard Ltd.
8  ** Licensed under the Apache License, Version 2.0 (the "License");
9  ** you may not use this file except in compliance with the License.
10  ** You may obtain a copy of the License at
11  ** http://www.apache.org/licenses/LICENSE-2.0
12  ** Unless required by applicable law or agreed to in writing, software
13  ** distributed under the License is distributed on an "AS IS" BASIS,
14  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  ** See the License for the specific language governing permissions and
16  ** limitations under the License.
17  *
18  **********************************************************************/
19 
20 #include "werdit.h"
21 
22 #include "errcode.h" // for ASSERT_HOST
23 #include "pageres.h" // for PAGE_RES_IT, PAGE_RES (ptr only), WERD_RES
24 #include "stepblob.h" // for C_BLOB_IT, C_BLOB, C_BLOB_LIST
25 #include "werd.h" // for WERD
26 
27 namespace tesseract {
28 
29 /**********************************************************************
30  * make_pseudo_word
31  *
32  * Make all the blobs inside a selection into a single word.
33  * The returned PAGE_RES_IT* it points to the new word. After use, call
34  * it->DeleteCurrentWord() to delete the fake word, and then
35  * delete it to get rid of the iterator itself.
36  **********************************************************************/
37 
38 PAGE_RES_IT *make_pseudo_word(PAGE_RES *page_res, const TBOX &selection_box) {
39  PAGE_RES_IT pr_it(page_res);
40  C_BLOB_LIST new_blobs; // list of gathered blobs
41  C_BLOB_IT new_blob_it = &new_blobs; // iterator
42 
43  for (WERD_RES *word_res = pr_it.word(); word_res != nullptr; word_res = pr_it.forward()) {
44  WERD *word = word_res->word;
45  if (word->bounding_box().overlap(selection_box)) {
46  C_BLOB_IT blob_it(word->cblob_list());
47  for (blob_it.mark_cycle_pt(); !blob_it.cycled_list(); blob_it.forward()) {
48  C_BLOB *blob = blob_it.data();
49  if (blob->bounding_box().overlap(selection_box)) {
50  new_blob_it.add_after_then_move(C_BLOB::deep_copy(blob));
51  }
52  }
53  if (!new_blobs.empty()) {
54  WERD *pseudo_word = new WERD(&new_blobs, 1, nullptr);
55  word_res = pr_it.InsertSimpleCloneWord(*word_res, pseudo_word);
56  auto *it = new PAGE_RES_IT(page_res);
57  while (it->word() != word_res && it->word() != nullptr) {
58  it->forward();
59  }
60  ASSERT_HOST(it->word() == word_res);
61  return it;
62  }
63  }
64  }
65  return nullptr;
66 }
67 
68 } // namespace tesseract
#define ASSERT_HOST(x)
Definition: errcode.h:59
PAGE_RES_IT * make_pseudo_word(PAGE_RES *page_res, const TBOX &selection_box)
Definition: werdit.cpp:38
WERD_RES * forward()
Definition: pageres.h:743
WERD_RES * word() const
Definition: pageres.h:763
WERD_RES * InsertSimpleCloneWord(const WERD_RES &clone_res, WERD *new_word)
Definition: pageres.cpp:1252
bool overlap(const TBOX &box) const
Definition: rect.h:363
TBOX bounding_box() const
Definition: stepblob.cpp:250
static C_BLOB * deep_copy(const C_BLOB *src)
Definition: stepblob.h:118
C_BLOB_LIST * cblob_list()
Definition: werd.h:96
TBOX bounding_box() const
Definition: werd.cpp:155