| Index: trunk/parsers/wikidom/tests/hype/es.DocumentModel.test.js |
| — | — | @@ -215,6 +215,47 @@ |
| 216 | 216 | deepEqual( documentModel.slice( 0 ), tree, 'Nodes in the model tree contain correct lengths' ); |
| 217 | 217 | } ); |
| 218 | 218 | |
| | 219 | +test( 'es.DocumentModel.getRelativeContentOffset', 6, function() { |
| | 220 | + var documentModel = es.DocumentModel.newFromPlainObject( obj ); |
| | 221 | + |
| | 222 | + // Test 1 |
| | 223 | + equal( |
| | 224 | + documentModel.getRelativeContentOffset( 1, 1 ), |
| | 225 | + 2, |
| | 226 | + 'getRelativeContentOffset advances forwards through the inside of elements' |
| | 227 | + ); |
| | 228 | + // Test 2 |
| | 229 | + equal( |
| | 230 | + documentModel.getRelativeContentOffset( 2, -1 ), |
| | 231 | + 1, |
| | 232 | + 'getRelativeContentOffset advances backwards through the inside of elements' |
| | 233 | + ); |
| | 234 | + // Test 3 |
| | 235 | + equal( |
| | 236 | + documentModel.getRelativeContentOffset( 1, -1 ), |
| | 237 | + 1, |
| | 238 | + 'getRelativeContentOffset treats the begining a document as a non-content offset' |
| | 239 | + ); |
| | 240 | + // Test 4 |
| | 241 | + equal( |
| | 242 | + documentModel.getRelativeContentOffset( 26, 1 ), |
| | 243 | + 26, |
| | 244 | + 'getRelativeContentOffset treats the end a document as a non-content offset' |
| | 245 | + ); |
| | 246 | + // Test 5 |
| | 247 | + equal( |
| | 248 | + documentModel.getRelativeContentOffset( 3, 1 ), |
| | 249 | + 9, |
| | 250 | + 'getRelativeContentOffset advances forwards between elements' |
| | 251 | + ); |
| | 252 | + // Test 6 |
| | 253 | + equal( |
| | 254 | + documentModel.getRelativeContentOffset( 26, -1 ), |
| | 255 | + 19, |
| | 256 | + 'getRelativeContentOffset advances backwards between elements' |
| | 257 | + ); |
| | 258 | +} ); |
| | 259 | + |
| 219 | 260 | test( 'es.DocumentModel.getContent', 6, function() { |
| 220 | 261 | var documentModel = es.DocumentModel.newFromPlainObject( obj ); |
| 221 | 262 | |
| Index: trunk/parsers/wikidom/lib/hype/models/es.DocumentModel.js |
| — | — | @@ -748,6 +748,38 @@ |
| 749 | 749 | }; |
| 750 | 750 | |
| 751 | 751 | /** |
| | 752 | + * Gets a content offset a given distance forwards or backwards from another. |
| | 753 | + * |
| | 754 | + * @method |
| | 755 | + * @param {Integer} offset Offset to start from |
| | 756 | + * @param {Integer} distance Number of content offsets to move |
| | 757 | + * @param {Integer} Offset a given distance from the given offset |
| | 758 | + */ |
| | 759 | +es.DocumentModel.prototype.getRelativeContentOffset = function( offset, distance ) { |
| | 760 | + if ( !es.DocumentModel.isContentOffset( this.data, offset ) ) { |
| | 761 | + throw 'Invalid offset error. Can not get relative content offset from non-content offset.'; |
| | 762 | + } |
| | 763 | + if ( distance === 0 ) { |
| | 764 | + return offset; |
| | 765 | + } |
| | 766 | + var direction = distance > 0 ? 1 : -1, |
| | 767 | + i = offset + direction, |
| | 768 | + steps = 0; |
| | 769 | + distance = Math.abs( distance ); |
| | 770 | + while ( i > 0 && i < this.data.length - 1 ) { |
| | 771 | + if ( typeof this.data[i] === 'string' || es.isArray( this.data[i] ) ) { |
| | 772 | + steps++; |
| | 773 | + offset = i; |
| | 774 | + if ( distance === steps ) { |
| | 775 | + return offset; |
| | 776 | + } |
| | 777 | + } |
| | 778 | + i += direction; |
| | 779 | + } |
| | 780 | + return offset; |
| | 781 | +}; |
| | 782 | + |
| | 783 | +/** |
| 752 | 784 | * Generates a transaction which inserts data at a given offset. |
| 753 | 785 | * |
| 754 | 786 | * @method |