wordpress-azure/wp-includes/Text/Diff.php at master · anogues/wordpress-azure · GitHub

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

<?php

/**

* General API for generating and formatting diffs - the differences between

* two sequences of strings.

* The original PHP version of this code was written by Geoffrey T. Dairiki

* <dairiki@dairiki.org>, and is used/adapted with his permission.

* See the enclosed file COPYING for license information (LGPL). If you did

* not receive this file, see http://opensource.org/licenses/lgpl-license.php.

* @package Text_Diff

* @author Geoffrey T. Dairiki <dairiki@dairiki.org>

class Text_Diff {

/**

* Array of changes.

* @var array

var $_edits;

/**

* Computes diffs between sequences of strings.

* @param string $engine Name of the diffing engine to use. 'auto'

* will automatically select the best.

* @param array $params Parameters to pass to the diffing engine.

* Normally an array of two arrays, each

* containing the lines from a file.

function __construct( $engine, $params )

{

// Backward compatibility workaround.

if (!is_string($engine)) {

$params = array($engine, $params);

$engine = 'auto';

}

if ($engine == 'auto') {

$engine = extension_loaded('xdiff') ? 'xdiff' : 'native';

} else {

$engine = basename($engine);

}

// WP #7391

require_once dirname(__FILE__).'/Diff/Engine/' . $engine . '.php';

$class = 'Text_Diff_Engine_' . $engine;

$diff_engine = new $class();

$this->_edits = call_user_func_array(array($diff_engine, 'diff'), $params);

}

/**

* PHP4 constructor.

public function Text_Diff( $engine, $params ) {

self::__construct( $engine, $params );

}

/**

* Returns the array of differences.

function getDiff()

{

return $this->_edits;

}

/**

* returns the number of new (added) lines in a given diff.

* @since Text_Diff 1.1.0

* @return integer The number of new lines

function countAddedLines()

{

$count = 0;

foreach ($this->_edits as $edit) {

if (is_a($edit, 'Text_Diff_Op_add') ||

is_a($edit, 'Text_Diff_Op_change')) {

$count += $edit->nfinal();

}

return $count;

}

/**

* Returns the number of deleted (removed) lines in a given diff.

* @since Text_Diff 1.1.0

* @return integer The number of deleted lines

function countDeletedLines()

{

$count = 0;

foreach ($this->_edits as $edit) {

if (is_a($edit, 'Text_Diff_Op_delete') ||

is_a($edit, 'Text_Diff_Op_change')) {

$count += $edit->norig();

}

return $count;

}

/**

* Computes a reversed diff.

* Example:

* <code>

* $diff = new Text_Diff($lines1, $lines2);

* $rev = $diff->reverse();

* </code>

* @return Text_Diff A Diff object representing the inverse of the

* original diff. Note that we purposely don't return a

* reference here, since this essentially is a clone()

* method.

function reverse()

{

if (version_compare(zend_version(), '2', '>')) {

$rev = clone($this);

} else {

$rev = $this;

}

$rev->_edits = array();

foreach ($this->_edits as $edit) {

$rev->_edits[] = $edit->reverse();

}

return $rev;

}

/**

* Checks for an empty diff.

* @return boolean True if two sequences were identical.

function isEmpty()

{

foreach ($this->_edits as $edit) {

if (!is_a($edit, 'Text_Diff_Op_copy')) {

return false;

}

return true;

}

/**

* Computes the length of the Longest Common Subsequence (LCS).

* This is mostly for diagnostic purposes.

* @return integer The length of the LCS.

function lcs()

{

$lcs = 0;

foreach ($this->_edits as $edit) {

if (is_a($edit, 'Text_Diff_Op_copy')) {

$lcs += count($edit->orig);

}

return $lcs;

}

/**

* Gets the original set of lines.

* This reconstructs the $from_lines parameter passed to the constructor.

* @return array The original sequence of strings.

function getOriginal()

{

$lines = array();

foreach ($this->_edits as $edit) {

if ($edit->orig) {

array_splice($lines, count($lines), 0, $edit->orig);

}

return $lines;

}

/**

* Gets the final set of lines.

* This reconstructs the $to_lines parameter passed to the constructor.

* @return array The sequence of strings.

function getFinal()

{

$lines = array();

foreach ($this->_edits as $edit) {

if ($edit->final) {

array_splice($lines, count($lines), 0, $edit->final);

}

return $lines;

}

/**

* Removes trailing newlines from a line of text. This is meant to be used

* with array_walk().

* @param string $line The line to trim.

* @param integer $key The index of the line in the array. Not used.

static function trimNewlines(&$line, $key)

{

$line = str_replace(array("\n", "\r"), '', $line);

}

/**

* Determines the location of the system temporary directory.

* @static

* @access protected

* @return string A directory name which can be used for temp files.

* Returns false if one could not be found.

function _getTempDir()

{

$tmp_locations = array('/tmp', '/var/tmp', 'c:\WUTemp', 'c:\temp',

'c:\windows\temp', 'c:\winnt\temp');

/* Try PHP's upload_tmp_dir directive. */

$tmp = ini_get('upload_tmp_dir');

/* Otherwise, try to determine the TMPDIR environment variable. */

if (!strlen($tmp)) {

$tmp = getenv('TMPDIR');

}

/* If we still cannot determine a value, then cycle through a list of

* preset possibilities. */

while (!strlen($tmp) && count($tmp_locations)) {

$tmp_check = array_shift($tmp_locations);

if (@is_dir($tmp_check)) {

$tmp = $tmp_check;

}

/* If it is still empty, we have failed, so return false; otherwise

* return the directory determined. */

return strlen($tmp) ? $tmp : false;

}

/**

* Checks a diff for validity.

* This is here only for debugging purposes.

function _check($from_lines, $to_lines)

{

if (serialize($from_lines) != serialize($this->getOriginal())) {

trigger_error("Reconstructed original doesn't match", E_USER_ERROR);

}

if (serialize($to_lines) != serialize($this->getFinal())) {

trigger_error("Reconstructed final doesn't match", E_USER_ERROR);

}

$rev = $this->reverse();

if (serialize($to_lines) != serialize($rev->getOriginal())) {

trigger_error("Reversed original doesn't match", E_USER_ERROR);

}

if (serialize($from_lines) != serialize($rev->getFinal())) {

trigger_error("Reversed final doesn't match", E_USER_ERROR);

}

$prevtype = null;

foreach ($this->_edits as $edit) {

if ($prevtype == get_class($edit)) {

trigger_error("Edit sequence is non-optimal", E_USER_ERROR);

}

$prevtype = get_class($edit);

}

return true;

}

/**

* @package Text_Diff

* @author Geoffrey T. Dairiki <dairiki@dairiki.org>

class Text_MappedDiff extends Text_Diff {

/**

* Computes a diff between sequences of strings.

* This can be used to compute things like case-insensitve diffs, or diffs

* which ignore changes in white-space.

* @param array $from_lines An array of strings.

* @param array $to_lines An array of strings.

* @param array $mapped_from_lines This array should have the same size

* number of elements as $from_lines. The

* elements in $mapped_from_lines and

* $mapped_to_lines are what is actually

* compared when computing the diff.

* @param array $mapped_to_lines This array should have the same number

* of elements as $to_lines.

function __construct($from_lines, $to_lines,

$mapped_from_lines, $mapped_to_lines)

{

assert(count($from_lines) == count($mapped_from_lines));

assert(count($to_lines) == count($mapped_to_lines));

parent::Text_Diff($mapped_from_lines, $mapped_to_lines);

$xi = $yi = 0;

for ($i = 0; $i < count($this->_edits); $i++) {

$orig = &$this->_edits[$i]->orig;

if (is_array($orig)) {

$orig = array_slice($from_lines, $xi, count($orig));

$xi += count($orig);

}

$final = &$this->_edits[$i]->final;

if (is_array($final)) {

$final = array_slice($to_lines, $yi, count($final));

$yi += count($final);

}

/**

* PHP4 constructor.

public function Text_MappedDiff( $from_lines, $to_lines,

$mapped_from_lines, $mapped_to_lines ) {

self::__construct( $from_lines, $to_lines,

$mapped_from_lines, $mapped_to_lines );

}

/**

* @package Text_Diff

* @author Geoffrey T. Dairiki <dairiki@dairiki.org>

* @access private

class Text_Diff_Op {

var $orig;

var $final;

function &reverse()

{

trigger_error('Abstract method', E_USER_ERROR);

}

function norig()

{

return $this->orig ? count($this->orig) : 0;

}

function nfinal()

{

return $this->final ? count($this->final) : 0;

}

/**

* @package Text_Diff

* @author Geoffrey T. Dairiki <dairiki@dairiki.org>

* @access private

class Text_Diff_Op_copy extends Text_Diff_Op {

/**

* PHP5 constructor.

function __construct( $orig, $final = false )

{

if (!is_array($final)) {

$final = $orig;

}

$this->orig = $orig;

$this->final = $final;

}

/**

* PHP4 constructor.

public function Text_Diff_Op_copy( $orig, $final = false ) {

self::__construct( $orig, $final );

}

function &reverse()

{

$reverse = new Text_Diff_Op_copy($this->final, $this->orig);

return $reverse;

}

/**

* @package Text_Diff

* @author Geoffrey T. Dairiki <dairiki@dairiki.org>

* @access private

class Text_Diff_Op_delete extends Text_Diff_Op {

/**

* PHP5 constructor.

function __construct( $lines )

{

$this->orig = $lines;

$this->final = false;

}

/**

* PHP4 constructor.

public function Text_Diff_Op_delete( $lines ) {

self::__construct( $lines );

}

function &reverse()

{

$reverse = new Text_Diff_Op_add($this->orig);

return $reverse;

}

/**

* @package Text_Diff

* @author Geoffrey T. Dairiki <dairiki@dairiki.org>

* @access private

class Text_Diff_Op_add extends Text_Diff_Op {

/**

* PHP5 constructor.

function __construct( $lines )

{

$this->final = $lines;

$this->orig = false;

}

/**

* PHP4 constructor.

public function Text_Diff_Op_add( $lines ) {

self::__construct( $lines );

}

function &reverse()

{

$reverse = new Text_Diff_Op_delete($this->final);

return $reverse;

}

/**

* @package Text_Diff

* @author Geoffrey T. Dairiki <dairiki@dairiki.org>

* @access private

class Text_Diff_Op_change extends Text_Diff_Op {

/**

* PHP5 constructor.

function __construct( $orig, $final )

{

$this->orig = $orig;

$this->final = $final;

}

/**

* PHP4 constructor.

public function Text_Diff_Op_change( $orig, $final ) {

self::__construct( $orig, $final );

}

function &reverse()

{

$reverse = new Text_Diff_Op_change($this->final, $this->orig);

return $reverse;

}

wordpress-azure/wp-includes/Text/Diff.php at master · anogues/wordpress-azure · GitHub

Repository navigation

Expand file tree

Breadcrumbs

Diff.php

Latest commit

History

Breadcrumbs

Diff.php

File metadata and controls