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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Pdf\Document; |
| 16 | |
| 17 | /** |
| 18 | * Pdf permissions class |
| 19 | * |
| 20 | * @category Pop |
| 21 | * @package Pop\Pdf |
| 22 | * @author Nick Sagona, III <nick@popphp.org> |
| 23 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 24 | * @license https://www.popphp.org/license New BSD License |
| 25 | * @version 6.2.0 |
| 26 | */ |
| 27 | class Permissions |
| 28 | { |
| 29 | |
| 30 | /** |
| 31 | * Allow printing |
| 32 | * @var bool |
| 33 | */ |
| 34 | protected bool $printing = true; |
| 35 | |
| 36 | /** |
| 37 | * Allow high (full) resolution printing |
| 38 | * @var bool |
| 39 | */ |
| 40 | protected bool $highResPrinting = true; |
| 41 | |
| 42 | /** |
| 43 | * Allow modifying the document |
| 44 | * @var bool |
| 45 | */ |
| 46 | protected bool $modifying = true; |
| 47 | |
| 48 | /** |
| 49 | * Allow copying/extracting text and graphics |
| 50 | * @var bool |
| 51 | */ |
| 52 | protected bool $copying = true; |
| 53 | |
| 54 | /** |
| 55 | * Allow adding or modifying text annotations |
| 56 | * @var bool |
| 57 | */ |
| 58 | protected bool $annotating = true; |
| 59 | |
| 60 | /** |
| 61 | * Allow filling in existing interactive form fields |
| 62 | * @var bool |
| 63 | */ |
| 64 | protected bool $fillingForms = true; |
| 65 | |
| 66 | /** |
| 67 | * Allow extracting text/graphics for accessibility purposes |
| 68 | * @var bool |
| 69 | */ |
| 70 | protected bool $extractingForAccessibility = true; |
| 71 | |
| 72 | /** |
| 73 | * Allow document assembly (insert/delete/rotate pages, bookmarks) |
| 74 | * @var bool |
| 75 | */ |
| 76 | protected bool $assembling = true; |
| 77 | |
| 78 | /** |
| 79 | * Set whether printing is allowed |
| 80 | * |
| 81 | * @param bool $allow |
| 82 | * @return Permissions |
| 83 | */ |
| 84 | public function allowPrinting(bool $allow = true): Permissions |
| 85 | { |
| 86 | $this->printing = $allow; |
| 87 | return $this; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Determine whether printing is allowed |
| 92 | * |
| 93 | * @return bool |
| 94 | */ |
| 95 | public function isPrintingAllowed(): bool |
| 96 | { |
| 97 | return $this->printing; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Set whether high (full) resolution printing is allowed |
| 102 | * |
| 103 | * @param bool $allow |
| 104 | * @return Permissions |
| 105 | */ |
| 106 | public function allowHighResPrinting(bool $allow = true): Permissions |
| 107 | { |
| 108 | $this->highResPrinting = $allow; |
| 109 | return $this; |
| 110 | } |
| 111 | |
| 112 | /** |
| 113 | * Determine whether high (full) resolution printing is allowed |
| 114 | * |
| 115 | * @return bool |
| 116 | */ |
| 117 | public function isHighResPrintingAllowed(): bool |
| 118 | { |
| 119 | return $this->highResPrinting; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Set whether modifying the document is allowed |
| 124 | * |
| 125 | * @param bool $allow |
| 126 | * @return Permissions |
| 127 | */ |
| 128 | public function allowModifying(bool $allow = true): Permissions |
| 129 | { |
| 130 | $this->modifying = $allow; |
| 131 | return $this; |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Determine whether modifying the document is allowed |
| 136 | * |
| 137 | * @return bool |
| 138 | */ |
| 139 | public function isModifyingAllowed(): bool |
| 140 | { |
| 141 | return $this->modifying; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Set whether copying/extracting text and graphics is allowed |
| 146 | * |
| 147 | * @param bool $allow |
| 148 | * @return Permissions |
| 149 | */ |
| 150 | public function allowCopying(bool $allow = true): Permissions |
| 151 | { |
| 152 | $this->copying = $allow; |
| 153 | return $this; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Determine whether copying/extracting text and graphics is allowed |
| 158 | * |
| 159 | * @return bool |
| 160 | */ |
| 161 | public function isCopyingAllowed(): bool |
| 162 | { |
| 163 | return $this->copying; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Set whether adding or modifying text annotations is allowed |
| 168 | * |
| 169 | * @param bool $allow |
| 170 | * @return Permissions |
| 171 | */ |
| 172 | public function allowAnnotating(bool $allow = true): Permissions |
| 173 | { |
| 174 | $this->annotating = $allow; |
| 175 | return $this; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Determine whether adding or modifying text annotations is allowed |
| 180 | * |
| 181 | * @return bool |
| 182 | */ |
| 183 | public function isAnnotatingAllowed(): bool |
| 184 | { |
| 185 | return $this->annotating; |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * Set whether filling in existing interactive form fields is allowed |
| 190 | * |
| 191 | * @param bool $allow |
| 192 | * @return Permissions |
| 193 | */ |
| 194 | public function allowFillingForms(bool $allow = true): Permissions |
| 195 | { |
| 196 | $this->fillingForms = $allow; |
| 197 | return $this; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Determine whether filling in existing interactive form fields is allowed |
| 202 | * |
| 203 | * @return bool |
| 204 | */ |
| 205 | public function isFillingFormsAllowed(): bool |
| 206 | { |
| 207 | return $this->fillingForms; |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * Set whether extracting text/graphics for accessibility purposes is allowed |
| 212 | * |
| 213 | * @param bool $allow |
| 214 | * @return Permissions |
| 215 | */ |
| 216 | public function allowExtractingForAccessibility(bool $allow = true): Permissions |
| 217 | { |
| 218 | $this->extractingForAccessibility = $allow; |
| 219 | return $this; |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * Determine whether extracting text/graphics for accessibility purposes is allowed |
| 224 | * |
| 225 | * @return bool |
| 226 | */ |
| 227 | public function isExtractingForAccessibilityAllowed(): bool |
| 228 | { |
| 229 | return $this->extractingForAccessibility; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * Set whether document assembly (insert/delete/rotate pages, bookmarks) is allowed |
| 234 | * |
| 235 | * @param bool $allow |
| 236 | * @return Permissions |
| 237 | */ |
| 238 | public function allowAssembling(bool $allow = true): Permissions |
| 239 | { |
| 240 | $this->assembling = $allow; |
| 241 | return $this; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Determine whether document assembly (insert/delete/rotate pages, bookmarks) is allowed |
| 246 | * |
| 247 | * @return bool |
| 248 | */ |
| 249 | public function isAssemblingAllowed(): bool |
| 250 | { |
| 251 | return $this->assembling; |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Pack the permission flags into ISO 32000-1 Table 22's signed 32-bit |
| 256 | * /P value. Every bit from 7 upward that Table 22 does not assign a |
| 257 | * meaning is reserved and must read as 1, so this starts from all bits |
| 258 | * set and clears only the specific bit for each permission that is |
| 259 | * denied - it never sets bits from 0 upward, which would risk leaving a |
| 260 | * reserved bit incorrectly cleared. |
| 261 | * |
| 262 | * Bits 1 and 2 (combined value 3) are the exception: Table 22 reserves |
| 263 | * them explicitly as "must be 0", so they are cleared up front. |
| 264 | * |
| 265 | * @return int |
| 266 | */ |
| 267 | public function toPValue(): int |
| 268 | { |
| 269 | $p = -1 & ~3; |
| 270 | |
| 271 | if (!$this->printing) { |
| 272 | $p &= ~4; |
| 273 | } |
| 274 | if (!$this->modifying) { |
| 275 | $p &= ~8; |
| 276 | } |
| 277 | if (!$this->copying) { |
| 278 | $p &= ~16; |
| 279 | } |
| 280 | if (!$this->annotating) { |
| 281 | $p &= ~32; |
| 282 | } |
| 283 | if (!$this->fillingForms) { |
| 284 | $p &= ~256; |
| 285 | } |
| 286 | if (!$this->extractingForAccessibility) { |
| 287 | $p &= ~512; |
| 288 | } |
| 289 | if (!$this->assembling) { |
| 290 | $p &= ~1024; |
| 291 | } |
| 292 | if (!$this->highResPrinting) { |
| 293 | $p &= ~2048; |
| 294 | } |
| 295 | |
| 296 | return $p; |
| 297 | } |
| 298 | } |