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4680 | right-hear | 1 | #include "fitz.h" |
2 | #include "mupdf.h" |
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3 | |||
4 | void |
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5 | pdf_free_link(pdf_link *link) |
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6 | { |
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7 | if (link->next) |
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8 | pdf_free_link(link->next); |
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9 | if (link->dest) |
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10 | fz_drop_obj(link->dest); |
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11 | fz_free(link); |
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12 | } |
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13 | |||
14 | static fz_obj * |
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15 | resolve_dest(pdf_xref *xref, fz_obj *dest) |
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16 | { |
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17 | if (fz_is_name(dest) || fz_is_string(dest)) |
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18 | { |
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19 | dest = pdf_lookup_dest(xref, dest); |
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20 | return resolve_dest(xref, dest); |
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21 | } |
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22 | |||
23 | else if (fz_is_array(dest)) |
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24 | { |
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25 | return dest; |
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26 | } |
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27 | |||
28 | else if (fz_is_dict(dest)) |
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29 | { |
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30 | dest = fz_dict_gets(dest, "D"); |
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31 | return resolve_dest(xref, dest); |
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32 | } |
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33 | |||
34 | else if (fz_is_indirect(dest)) |
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35 | return dest; |
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36 | |||
37 | return NULL; |
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38 | } |
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39 | |||
40 | pdf_link * |
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41 | pdf_load_link(pdf_xref *xref, fz_obj *dict) |
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42 | { |
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43 | fz_obj *dest; |
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44 | fz_obj *action; |
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45 | fz_obj *obj; |
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46 | fz_rect bbox; |
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47 | pdf_link_kind kind; |
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48 | |||
49 | dest = NULL; |
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50 | |||
51 | obj = fz_dict_gets(dict, "Rect"); |
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52 | if (obj) |
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53 | bbox = pdf_to_rect(obj); |
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54 | else |
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55 | bbox = fz_empty_rect; |
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56 | |||
57 | obj = fz_dict_gets(dict, "Dest"); |
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58 | if (obj) |
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59 | { |
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60 | kind = PDF_LINK_GOTO; |
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61 | dest = resolve_dest(xref, obj); |
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62 | } |
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63 | |||
64 | action = fz_dict_gets(dict, "A"); |
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65 | |||
66 | /* fall back to additional action button's down/up action */ |
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67 | if (!action) |
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68 | action = fz_dict_getsa(fz_dict_gets(dict, "AA"), "U", "D"); |
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69 | |||
70 | if (action) |
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71 | { |
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72 | obj = fz_dict_gets(action, "S"); |
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73 | if (fz_is_name(obj) && !strcmp(fz_to_name(obj), "GoTo")) |
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74 | { |
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75 | kind = PDF_LINK_GOTO; |
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76 | dest = resolve_dest(xref, fz_dict_gets(action, "D")); |
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77 | } |
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78 | else if (fz_is_name(obj) && !strcmp(fz_to_name(obj), "URI")) |
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79 | { |
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80 | kind = PDF_LINK_URI; |
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81 | dest = fz_dict_gets(action, "URI"); |
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82 | } |
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83 | else if (fz_is_name(obj) && !strcmp(fz_to_name(obj), "Launch")) |
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84 | { |
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85 | kind = PDF_LINK_LAUNCH; |
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86 | dest = fz_dict_gets(action, "F"); |
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87 | } |
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88 | else if (fz_is_name(obj) && !strcmp(fz_to_name(obj), "Named")) |
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89 | { |
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90 | kind = PDF_LINK_NAMED; |
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91 | dest = fz_dict_gets(action, "N"); |
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92 | } |
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93 | else if (fz_is_name(obj) && (!strcmp(fz_to_name(obj), "GoToR"))) |
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94 | { |
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95 | kind = PDF_LINK_ACTION; |
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96 | dest = action; |
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97 | } |
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98 | else |
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99 | { |
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100 | dest = NULL; |
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101 | } |
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102 | } |
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103 | |||
104 | if (dest) |
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105 | { |
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106 | pdf_link *link = fz_malloc(sizeof(pdf_link)); |
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107 | link->kind = kind; |
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108 | link->rect = bbox; |
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109 | link->dest = fz_keep_obj(dest); |
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110 | link->next = NULL; |
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111 | return link; |
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112 | } |
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113 | |||
114 | return NULL; |
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115 | } |
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116 | |||
117 | void |
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118 | pdf_load_links(pdf_link **linkp, pdf_xref *xref, fz_obj *annots) |
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119 | { |
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120 | pdf_link *link, *head, *tail; |
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121 | fz_obj *obj; |
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122 | int i; |
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123 | |||
124 | head = tail = NULL; |
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125 | link = NULL; |
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126 | |||
127 | for (i = 0; i < fz_array_len(annots); i++) |
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128 | { |
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129 | obj = fz_array_get(annots, i); |
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130 | link = pdf_load_link(xref, obj); |
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131 | if (link) |
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132 | { |
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133 | if (!head) |
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134 | head = tail = link; |
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135 | else |
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136 | { |
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137 | tail->next = link; |
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138 | tail = link; |
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139 | } |
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140 | } |
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141 | } |
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142 | |||
143 | *linkp = head; |
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144 | } |
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145 | |||
146 | void |
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147 | pdf_free_annot(pdf_annot *annot) |
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148 | { |
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149 | if (annot->next) |
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150 | pdf_free_annot(annot->next); |
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151 | if (annot->ap) |
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152 | pdf_drop_xobject(annot->ap); |
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153 | if (annot->obj) |
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154 | fz_drop_obj(annot->obj); |
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155 | fz_free(annot); |
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156 | } |
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157 | |||
158 | static void |
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159 | pdf_transform_annot(pdf_annot *annot) |
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160 | { |
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161 | fz_matrix matrix = annot->ap->matrix; |
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162 | fz_rect bbox = annot->ap->bbox; |
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163 | fz_rect rect = annot->rect; |
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164 | float w, h, x, y; |
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165 | |||
166 | bbox = fz_transform_rect(matrix, bbox); |
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167 | w = (rect.x1 - rect.x0) / (bbox.x1 - bbox.x0); |
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168 | h = (rect.y1 - rect.y0) / (bbox.y1 - bbox.y0); |
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169 | x = rect.x0 - bbox.x0; |
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170 | y = rect.y0 - bbox.y0; |
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171 | |||
172 | annot->matrix = fz_concat(fz_scale(w, h), fz_translate(x, y)); |
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173 | } |
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174 | |||
175 | void |
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176 | pdf_load_annots(pdf_annot **annotp, pdf_xref *xref, fz_obj *annots) |
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177 | { |
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178 | pdf_annot *annot, *head, *tail; |
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179 | fz_obj *obj, *ap, *as, *n, *rect; |
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180 | pdf_xobject *form; |
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181 | fz_error error; |
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182 | int i; |
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183 | |||
184 | head = tail = NULL; |
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185 | annot = NULL; |
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186 | |||
187 | for (i = 0; i < fz_array_len(annots); i++) |
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188 | { |
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189 | obj = fz_array_get(annots, i); |
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190 | |||
191 | rect = fz_dict_gets(obj, "Rect"); |
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192 | ap = fz_dict_gets(obj, "AP"); |
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193 | as = fz_dict_gets(obj, "AS"); |
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194 | if (fz_is_dict(ap)) |
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195 | { |
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196 | n = fz_dict_gets(ap, "N"); /* normal state */ |
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197 | |||
198 | /* lookup current state in sub-dictionary */ |
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199 | if (!pdf_is_stream(xref, fz_to_num(n), fz_to_gen(n))) |
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200 | n = fz_dict_get(n, as); |
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201 | |||
202 | if (pdf_is_stream(xref, fz_to_num(n), fz_to_gen(n))) |
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203 | { |
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204 | error = pdf_load_xobject(&form, xref, n); |
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205 | if (error) |
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206 | { |
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207 | fz_catch(error, "ignoring broken annotation"); |
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208 | continue; |
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209 | } |
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210 | |||
211 | annot = fz_malloc(sizeof(pdf_annot)); |
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212 | annot->obj = fz_keep_obj(obj); |
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213 | annot->rect = pdf_to_rect(rect); |
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214 | annot->ap = form; |
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215 | annot->next = NULL; |
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216 | |||
217 | pdf_transform_annot(annot); |
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218 | |||
219 | if (annot) |
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220 | { |
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221 | if (!head) |
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222 | head = tail = annot; |
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223 | else |
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224 | { |
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225 | tail->next = annot; |
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226 | tail = annot; |
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227 | } |
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228 | } |
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229 | } |
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230 | } |
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231 | } |
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232 | |||
233 | *annotp = head; |
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234 | }>> |