tesseract-ocr/ccmain/werdit.cpp

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/**********************************************************************
 * File:        werdit.cpp  (Formerly wordit.c)
 * Description: An iterator for passing over all the words in a document.
 * Author:              Ray Smith
 * Created:             Mon Apr 27 08:51:22 BST 1992
 *
 * (C) Copyright 1992, Hewlett-Packard Ltd.
 ** Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 ** Unless required by applicable law or agreed to in writing, software
 ** distributed under the License is distributed on an "AS IS" BASIS,
 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 ** See the License for the specific language governing permissions and
 ** limitations under the License.
 *
 **********************************************************************/

#include "mfcpch.h"
#include "werdit.h"

/**********************************************************************
 * make_pseudo_word
 *
 * Make all the blobs inside a selection into a single word.
 * The word is always a copy and needs to be deleted.
 **********************************************************************/

WERD *make_pseudo_word(PAGE_RES* page_res,  // Blocks to check.
                       TBOX &selection_box,
                       BLOCK *&pseudo_block,
                       ROW *&pseudo_row) {      // Row of selection.
  PAGE_RES_IT pr_it(page_res);
  C_BLOB_LIST new_blobs;               // list of gathered blobs
  C_BLOB_IT new_blob_it = &new_blobs;  // iterator
  WERD *pseudo_word;                   // fabricated word

  for (WERD_RES* word_res = pr_it.word(); word_res != NULL;
       word_res = pr_it.forward()) {
    WERD* word = word_res->word;
    if (word->bounding_box().overlap(selection_box)) {
      C_BLOB_IT blob_it(word->cblob_list());
      for (blob_it.mark_cycle_pt();
           !blob_it.cycled_list(); blob_it.forward()) {
        C_BLOB* blob = blob_it.data();
        if (blob->bounding_box().overlap(selection_box)) {
          new_blob_it.add_after_then_move(C_BLOB::deep_copy(blob));
          pseudo_row = pr_it.row()->row;
          pseudo_block = pr_it.block()->block;
        }
      }
    }
  }
  if (!new_blobs.empty())
    pseudo_word = new WERD(&new_blobs, 1, NULL);
  else
    pseudo_word = NULL;
  return pseudo_word;
}