Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/textord/tabvector.h @ 33:c4daa0c83d64

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 17:55:13 +0200
parents b50eed0cc0ef
children
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2
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: tabvector.h
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3 // Description: Class to hold a near-vertical vector representing a tab-stop.
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4 // Author: Ray Smith
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5 //
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6 // (C) Copyright 2008, Google Inc.
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7 // Licensed under the Apache License, Version 2.0 (the "License");
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8 // you may not use this file except in compliance with the License.
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9 // You may obtain a copy of the License at
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10 // http://www.apache.org/licenses/LICENSE-2.0
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11 // Unless required by applicable law or agreed to in writing, software
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12 // distributed under the License is distributed on an "AS IS" BASIS,
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13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 // See the License for the specific language governing permissions and
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15 // limitations under the License.
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16 //
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17 ///////////////////////////////////////////////////////////////////////
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19 #ifndef TESSERACT_TEXTORD_TABVECTOR_H_
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20 #define TESSERACT_TEXTORD_TABVECTOR_H_
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22 #include "bbgrid.h"
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23 #include "blobgrid.h"
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24 #include "clst.h"
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25 #include "elst.h"
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26 #include "elst2.h"
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27 #include "rect.h"
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29 #include <algorithm>
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31 class BLOBNBOX;
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32 class ScrollView;
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34 namespace tesseract {
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36 extern double_VAR_H(textord_tabvector_vertical_gap_fraction);
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37 extern double_VAR_H(textord_tabvector_vertical_box_ratio);
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39 // The alignment type that a tab vector represents.
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40 // Keep this enum synced with kAlignmentNames in tabvector.cpp.
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41 enum TabAlignment {
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42 TA_LEFT_ALIGNED,
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43 TA_LEFT_RAGGED,
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44 TA_CENTER_JUSTIFIED,
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45 TA_RIGHT_ALIGNED,
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46 TA_RIGHT_RAGGED,
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47 TA_SEPARATOR,
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48 TA_COUNT
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49 };
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51 // Forward declarations. The classes use their own list types, so we
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52 // need to make the list types first.
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53 class TabFind;
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54 class TabVector;
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55 class TabConstraint;
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57 ELIST2IZEH(TabVector)
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58 CLISTIZEH(TabVector)
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59 ELISTIZEH(TabConstraint)
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61 // TabConstraint is a totally self-contained class to maintain
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62 // a list of [min,max] constraints, each referring to a TabVector.
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63 // The constraints are manipulated through static methods that act
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64 // on a list of constraints. The list itself is cooperatively owned
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65 // by the TabVectors of the constraints on the list and managed
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66 // by implicit reference counting via the elements of the list.
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67 class TabConstraint : public ELIST_LINK {
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68 public:
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69 // This empty constructor is here only so that the class can be ELISTIZED.
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70 // TODO(rays) change deep_copy in elst.h line 955 to take a callback copier
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71 // and eliminate CLASSNAME##_copier.
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72 TabConstraint() = default;
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73
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74 // Create a constraint for the top or bottom of this TabVector.
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75 static void CreateConstraint(TabVector *vector, bool is_top);
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76
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77 // Test to see if the constraints are compatible enough to merge.
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78 static bool CompatibleConstraints(TabConstraint_LIST *list1, TabConstraint_LIST *list2);
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79
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80 // Merge the lists of constraints and update the TabVector pointers.
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81 // The second list is deleted.
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82 static void MergeConstraints(TabConstraint_LIST *list1, TabConstraint_LIST *list2);
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83
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84 // Set all the tops and bottoms as appropriate to a mean of the
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85 // constrained range. Delete all the constraints and list.
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86 static void ApplyConstraints(TabConstraint_LIST *constraints);
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87
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88 private:
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89 TabConstraint(TabVector *vector, bool is_top);
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90
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91 // Get the max of the mins and the min of the maxes.
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92 static void GetConstraints(TabConstraint_LIST *constraints, int *y_min, int *y_max);
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93
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94 // The TabVector this constraint applies to.
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95 TabVector *vector_;
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96 // If true then we refer to the top of the vector_.
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97 bool is_top_;
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98 // The allowed range of this vector_.
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99 int y_min_;
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100 int y_max_;
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101 };
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102
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103 // Class to hold information about a single vector
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104 // that represents a tab stop or a rule line.
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105 class TabVector : public ELIST2_LINK {
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106 public:
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107 // TODO(rays) fix this in elst.h line 1076, where it should use the
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108 // copy constructor instead of operator=.
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109 TabVector() = default;
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110 ~TabVector() = default;
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111
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112 // Public factory to build a TabVector from a list of boxes.
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113 // The TabVector will be of the given alignment type.
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114 // The input vertical vector is used in fitting, and the output
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115 // vertical_x, vertical_y have the resulting line vector added to them
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116 // if the alignment is not ragged.
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117 // The extended_start_y and extended_end_y are the maximum possible
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118 // extension to the line segment that can be used to align with others.
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119 // The input CLIST of BLOBNBOX good_points is consumed and taken over.
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120 static TabVector *FitVector(TabAlignment alignment, ICOORD vertical, int extended_start_y,
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121 int extended_end_y, BLOBNBOX_CLIST *good_points, int *vertical_x,
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122 int *vertical_y);
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123
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124 // Build a ragged TabVector by copying another's direction, shifting it
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125 // to match the given blob, and making its initial extent the height
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126 // of the blob, but its extended bounds from the bounds of the original.
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127 TabVector(const TabVector &src, TabAlignment alignment, const ICOORD &vertical_skew,
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128 BLOBNBOX *blob);
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129
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130 // Copies basic attributes of a tab vector for simple operations.
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131 // Copies things such startpt, endpt, range, width.
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132 // Does not copy things such as partners, boxes, or constraints.
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133 // This is useful if you only need vector information for processing, such
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134 // as in the table detection code.
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135 TabVector *ShallowCopy() const;
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136
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137 // Simple accessors.
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138 const ICOORD &startpt() const {
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139 return startpt_;
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140 }
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141 const ICOORD &endpt() const {
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142 return endpt_;
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143 }
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144 int extended_ymax() const {
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145 return extended_ymax_;
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146 }
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147 int extended_ymin() const {
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148 return extended_ymin_;
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149 }
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150 int sort_key() const {
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151 return sort_key_;
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152 }
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153 int mean_width() const {
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154 return mean_width_;
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155 }
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156 void set_top_constraints(TabConstraint_LIST *constraints) {
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157 top_constraints_ = constraints;
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158 }
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159 void set_bottom_constraints(TabConstraint_LIST *constraints) {
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160 bottom_constraints_ = constraints;
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161 }
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162 TabVector_CLIST *partners() {
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163 return &partners_;
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164 }
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165 void set_startpt(const ICOORD &start) {
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166 startpt_ = start;
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167 }
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168 void set_endpt(const ICOORD &end) {
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169 endpt_ = end;
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170 }
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171 bool intersects_other_lines() const {
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172 return intersects_other_lines_;
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173 }
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174 void set_intersects_other_lines(bool value) {
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175 intersects_other_lines_ = value;
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176 }
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177
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178 // Inline quasi-accessors that require some computation.
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179
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180 // Compute the x coordinate at the given y coordinate.
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181 int XAtY(int y) const {
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182 int height = endpt_.y() - startpt_.y();
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183 if (height != 0) {
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184 return (y - startpt_.y()) * (endpt_.x() - startpt_.x()) / height + startpt_.x();
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185 } else {
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186 return startpt_.x();
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187 }
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188 }
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189
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190 // Compute the vertical overlap with the other TabVector.
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191 int VOverlap(const TabVector &other) const {
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192 return std::min(other.endpt_.y(), endpt_.y()) - std::max(other.startpt_.y(), startpt_.y());
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193 }
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194 // Compute the vertical overlap with the given y bounds.
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195 int VOverlap(int top_y, int bottom_y) const {
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196 return std::min(top_y, static_cast<int>(endpt_.y())) -
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197 std::max(bottom_y, static_cast<int>(startpt_.y()));
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198 }
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199 // Compute the extended vertical overlap with the given y bounds.
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diff changeset
200 int ExtendedOverlap(int top_y, int bottom_y) const {
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201 return std::min(top_y, extended_ymax_) - std::max(bottom_y, extended_ymin_);
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202 }
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203
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204 // Return true if this is a left tab stop, either aligned, or ragged.
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205 bool IsLeftTab() const {
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206 return alignment_ == TA_LEFT_ALIGNED || alignment_ == TA_LEFT_RAGGED;
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207 }
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208 // Return true if this is a right tab stop, either aligned, or ragged.
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diff changeset
209 bool IsRightTab() const {
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210 return alignment_ == TA_RIGHT_ALIGNED || alignment_ == TA_RIGHT_RAGGED;
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211 }
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212 // Return true if this is a separator.
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213 bool IsSeparator() const {
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214 return alignment_ == TA_SEPARATOR;
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215 }
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216 // Return true if this is a center aligned tab stop.
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217 bool IsCenterTab() const {
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218 return alignment_ == TA_CENTER_JUSTIFIED;
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219 }
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220 // Return true if this is a ragged tab top, either left or right.
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221 bool IsRagged() const {
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222 return alignment_ == TA_LEFT_RAGGED || alignment_ == TA_RIGHT_RAGGED;
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223 }
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224
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225 // Return true if this vector is to the left of the other in terms
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226 // of sort_key_.
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227 bool IsLeftOf(const TabVector &other) const {
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228 return sort_key_ < other.sort_key_;
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229 }
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230
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231 // Return true if the vector has no partners.
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232 bool Partnerless() {
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233 return partners_.empty();
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234 }
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235
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236 // Return the number of tab boxes in this vector.
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237 int BoxCount() {
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238 return boxes_.length();
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239 }
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240
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241 // Lock the vector from refits by clearing the boxes_ list.
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242 void Freeze() {
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243 boxes_.shallow_clear();
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244 }
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245
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246 // Flip x and y on the ends so a vector can be created from flipped input.
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247 void XYFlip() {
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248 int x = startpt_.y();
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249 startpt_.set_y(startpt_.x());
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250 startpt_.set_x(x);
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251 x = endpt_.y();
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252 endpt_.set_y(endpt_.x());
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253 endpt_.set_x(x);
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254 }
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255
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256 // Reflect the tab vector in the y-axis.
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257 void ReflectInYAxis() {
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258 startpt_.set_x(-startpt_.x());
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259 endpt_.set_x(-endpt_.x());
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diff changeset
260 sort_key_ = -sort_key_;
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diff changeset
261 if (alignment_ == TA_LEFT_ALIGNED) {
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diff changeset
262 alignment_ = TA_RIGHT_ALIGNED;
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diff changeset
263 } else if (alignment_ == TA_RIGHT_ALIGNED) {
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diff changeset
264 alignment_ = TA_LEFT_ALIGNED;
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265 }
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diff changeset
266 if (alignment_ == TA_LEFT_RAGGED) {
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diff changeset
267 alignment_ = TA_RIGHT_RAGGED;
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diff changeset
268 } else if (alignment_ == TA_RIGHT_RAGGED) {
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diff changeset
269 alignment_ = TA_LEFT_RAGGED;
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270 }
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271 }
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272
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parents:
diff changeset
273 // Separate function to compute the sort key for a given coordinate pair.
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diff changeset
274 static int SortKey(const ICOORD &vertical, int x, int y) {
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diff changeset
275 ICOORD pt(x, y);
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diff changeset
276 return pt * vertical;
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277 }
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278
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279 // Return the x at the given y for the given sort key.
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diff changeset
280 static int XAtY(const ICOORD &vertical, int sort_key, int y) {
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parents:
diff changeset
281 if (vertical.y() != 0) {
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diff changeset
282 return (vertical.x() * y + sort_key) / vertical.y();
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parents:
diff changeset
283 } else {
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parents:
diff changeset
284 return sort_key;
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285 }
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parents:
diff changeset
286 }
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parents:
diff changeset
287
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parents:
diff changeset
288 // Sort function for E2LIST::sort to sort by sort_key_.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
289 static int SortVectorsByKey(const void *v1, const void *v2) {
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diff changeset
290 const TabVector *tv1 = *static_cast<const TabVector *const *>(v1);
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diff changeset
291 const TabVector *tv2 = *static_cast<const TabVector *const *>(v2);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
292 return tv1->sort_key_ - tv2->sort_key_;
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parents:
diff changeset
293 }
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diff changeset
294
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parents:
diff changeset
295 // More complex members.
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parents:
diff changeset
296
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parents:
diff changeset
297 // Extend this vector to include the supplied blob if it doesn't
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parents:
diff changeset
298 // already have it.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
299 void ExtendToBox(BLOBNBOX *blob);
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parents:
diff changeset
300
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parents:
diff changeset
301 // Set the ycoord of the start and move the xcoord to match.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
302 void SetYStart(int start_y);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
303 // Set the ycoord of the end and move the xcoord to match.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
304 void SetYEnd(int end_y);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
305
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
306 // Rotate the ends by the given vector.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
307 void Rotate(const FCOORD &rotation);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
308
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
309 // Setup the initial constraints, being the limits of
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
310 // the vector and the extended ends.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
311 void SetupConstraints();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
312
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
313 // Setup the constraints between the partners of this TabVector.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
314 void SetupPartnerConstraints();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
315
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
316 // Setup the constraints between this and its partner.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
317 void SetupPartnerConstraints(TabVector *partner);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
318
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
319 // Use the constraints to modify the top and bottom.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
320 void ApplyConstraints();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
321
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
322 // Merge close tab vectors of the same side that overlap.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
323 static void MergeSimilarTabVectors(const ICOORD &vertical, TabVector_LIST *vectors,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
324 BlobGrid *grid);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
325
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
326 // Return true if this vector is the same side, overlaps, and close
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
327 // enough to the other to be merged.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
328 bool SimilarTo(const ICOORD &vertical, const TabVector &other, BlobGrid *grid) const;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
329
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
330 // Eat the other TabVector into this and delete it.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
331 void MergeWith(const ICOORD &vertical, TabVector *other);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
332
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
333 // Add a new element to the list of partner TabVectors.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
334 // Partners must be added in order of increasing y coordinate of the text line
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
335 // that makes them partners.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
336 // Groups of identical partners are merged into one.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
337 void AddPartner(TabVector *partner);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
338
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
339 // Return true if other is a partner of this.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
340 bool IsAPartner(const TabVector *other);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
341
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
342 // Print basic information about this tab vector.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
343 void Print(const char *prefix);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
344
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
345 // Print basic information about this tab vector and every box in it.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
346 void Debug(const char *prefix);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
347
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
348 // Draw this tabvector in place in the given window.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
349 void Display(ScrollView *tab_win);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
350
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
351 // Refit the line and/or re-evaluate the vector if the dirty flags are set.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
352 void FitAndEvaluateIfNeeded(const ICOORD &vertical, TabFind *finder);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
353
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
354 // Evaluate the vector in terms of coverage of its length by good-looking
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
355 // box edges. A good looking box is one where its nearest neighbour on the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
356 // inside is nearer than half the distance its nearest neighbour on the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
357 // outside of the putative column. Bad boxes are removed from the line.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
358 // A second pass then further filters boxes by requiring that the gutter
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
359 // width be a minimum fraction of the mean gutter along the line.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
360 void Evaluate(const ICOORD &vertical, TabFind *finder);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
361
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
362 // (Re)Fit a line to the stored points. Returns false if the line
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
363 // is degenerate. Although the TabVector code mostly doesn't care about the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
364 // direction of lines, XAtY would give silly results for a horizontal line.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
365 // The class is mostly aimed at use for vertical lines representing
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
366 // horizontal tab stops.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
367 bool Fit(ICOORD vertical, bool force_parallel);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
368
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
369 // Return the partner of this TabVector if the vector qualifies as
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
370 // being a vertical text line, otherwise nullptr.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
371 TabVector *VerticalTextlinePartner();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
372
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
373 // Return the matching tabvector if there is exactly one partner, or
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
374 // nullptr otherwise. This can be used after matching is done, eg. by
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
375 // VerticalTextlinePartner(), without checking if the line is vertical.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
376 TabVector *GetSinglePartner();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
377
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
378 private:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
379 // Constructor is private as the static factory is the external way
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
380 // to build a TabVector.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
381 TabVector(int extended_ymin, int extended_ymax, TabAlignment alignment, BLOBNBOX_CLIST *boxes);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
382
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
383 // Delete this, but first, repoint all the partners to point to
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
384 // replacement. If replacement is nullptr, then partner relationships
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
385 // are removed.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
386 void Delete(TabVector *replacement);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
387
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
388 private:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
389 // The bottom of the tab line.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
390 ICOORD startpt_;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
391 // The top of the tab line.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
392 ICOORD endpt_;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
393 // The lowest y that the vector might extend to.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
394 int extended_ymin_ = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
395 // The highest y that the vector might extend to.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
396 int extended_ymax_ = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
397 // Perpendicular distance of vector from a given vertical for sorting.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
398 int sort_key_ = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
399 // Result of Evaluate 0-100. Coverage of line with good boxes.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
400 int percent_score_ = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
401 // The mean width of the blobs. Meaningful only for separator lines.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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402 int mean_width_ = 0;
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403 // True if the boxes_ list has been modified, so a refit is needed.
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404 bool needs_refit_ = false;
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405 // True if a fit has been done, so re-evaluation is needed.
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406 bool needs_evaluation_ = false;
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407 // True if a separator line intersects at least 2 other lines.
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408 bool intersects_other_lines_ = false;
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409 // The type of this TabVector.
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410 TabAlignment alignment_ = TA_LEFT_ALIGNED;
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411 // The list of boxes whose edges are aligned at this TabVector.
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412 BLOBNBOX_CLIST boxes_;
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413 // List of TabVectors that have a connection with this via a text line.
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414 TabVector_CLIST partners_;
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415 // Constraints used to resolve the exact location of the top and bottom
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416 // of the tab line.
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417 TabConstraint_LIST *top_constraints_ = nullptr;
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418 TabConstraint_LIST *bottom_constraints_ = nullptr;
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419 };
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420
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421 } // namespace tesseract.
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422
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423 #endif // TESSERACT_TEXTORD_TABVECTOR_H_