vue-files-preview-inno/es/node_modules/epubjs/src/mapping.mjs.map

A tool for previewing files such as doc, excel, pdf, image, markdown, txt, audio, and video and so on.

{"version":3,"file":"mapping.mjs","sources":["../../../../../node_modules/epubjs/src/mapping.js"],"sourcesContent":["import EpubCFI from \"./epubcfi\";\nimport { nodeBounds } from \"./utils/core\";\n\n/**\n * Map text locations to CFI ranges\n * @class\n * @param {Layout} layout Layout to apply\n * @param {string} [direction=\"ltr\"] Text direction\n * @param {string} [axis=\"horizontal\"] vertical or horizontal axis\n * @param {boolean} [dev] toggle developer highlighting\n */\nclass Mapping {\n\tconstructor(layout, direction, axis, dev=false) {\n\t\tthis.layout = layout;\n\t\tthis.horizontal = (axis === \"horizontal\") ? true : false;\n\t\tthis.direction = direction || \"ltr\";\n\t\tthis._dev = dev;\n\t}\n\n\t/**\n\t * Find CFI pairs for entire section at once\n\t */\n\tsection(view) {\n\t\tvar ranges = this.findRanges(view);\n\t\tvar map = this.rangeListToCfiList(view.section.cfiBase, ranges);\n\n\t\treturn map;\n\t}\n\n\t/**\n\t * Find CFI pairs for a page\n\t * @param {Contents} contents Contents from view\n\t * @param {string} cfiBase string of the base for a cfi\n\t * @param {number} start position to start at\n\t * @param {number} end position to end at\n\t */\n\tpage(contents, cfiBase, start, end) {\n\t\tvar root = contents && contents.document ? contents.document.body : false;\n\t\tvar result;\n\n\t\tif (!root) {\n\t\t\treturn;\n\t\t}\n\n\t\tresult = this.rangePairToCfiPair(cfiBase, {\n\t\t\tstart: this.findStart(root, start, end),\n\t\t\tend: this.findEnd(root, start, end)\n\t\t});\n\n\t\tif (this._dev === true) {\n\t\t\tlet doc = contents.document;\n\t\t\tlet startRange = new EpubCFI(result.start).toRange(doc);\n\t\t\tlet endRange = new EpubCFI(result.end).toRange(doc);\n\n\t\t\tlet selection = doc.defaultView.getSelection();\n\t\t\tlet r = doc.createRange();\n\t\t\tselection.removeAllRanges();\n\t\t\tr.setStart(startRange.startContainer, startRange.startOffset);\n\t\t\tr.setEnd(endRange.endContainer, endRange.endOffset);\n\t\t\tselection.addRange(r);\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Walk a node, preforming a function on each node it finds\n\t * @private\n\t * @param {Node} root Node to walkToNode\n\t * @param {function} func walk function\n\t * @return {*} returns the result of the walk function\n\t */\n\twalk(root, func) {\n\t\t// IE11 has strange issue, if root is text node IE throws exception on\n\t\t// calling treeWalker.nextNode(), saying\n\t\t// Unexpected call to method or property access instead of returning null value\n\t\tif(root && root.nodeType === Node.TEXT_NODE) {\n\t\t\treturn;\n\t\t}\n\t\t// safeFilter is required so that it can work in IE as filter is a function for IE\n\t\t// and for other browser filter is an object.\n\t\tvar filter = {\n\t\t\tacceptNode: function(node) {\n\t\t\t\tif (node.data.trim().length > 0) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t} else {\n\t\t\t\t\treturn NodeFilter.FILTER_REJECT;\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t\tvar safeFilter = filter.acceptNode;\n\t\tsafeFilter.acceptNode = filter.acceptNode;\n\n\t\tvar treeWalker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, safeFilter, false);\n\t\tvar node;\n\t\tvar result;\n\t\twhile ((node = treeWalker.nextNode())) {\n\t\t\tresult = func(node);\n\t\t\tif(result) break;\n\t\t}\n\n\t\treturn result;\n\t}\n\n\tfindRanges(view){\n\t\tvar columns = [];\n\t\tvar scrollWidth = view.contents.scrollWidth();\n\t\tvar spreads = Math.ceil( scrollWidth / this.layout.spreadWidth);\n\t\tvar count = spreads * this.layout.divisor;\n\t\tvar columnWidth = this.layout.columnWidth;\n\t\tvar gap = this.layout.gap;\n\t\tvar start, end;\n\n\t\tfor (var i = 0; i < count.pages; i++) {\n\t\t\tstart = (columnWidth + gap) * i;\n\t\t\tend = (columnWidth * (i+1)) + (gap * i);\n\t\t\tcolumns.push({\n\t\t\t\tstart: this.findStart(view.document.body, start, end),\n\t\t\t\tend: this.findEnd(view.document.body, start, end)\n\t\t\t});\n\t\t}\n\n\t\treturn columns;\n\t}\n\n\t/**\n\t * Find Start Range\n\t * @private\n\t * @param {Node} root root node\n\t * @param {number} start position to start at\n\t * @param {number} end position to end at\n\t * @return {Range}\n\t */\n\tfindStart(root, start, end){\n\t\tvar stack = [root];\n\t\tvar $el;\n\t\tvar found;\n\t\tvar $prev = root;\n\n\t\twhile (stack.length) {\n\n\t\t\t$el = stack.shift();\n\n\t\t\tfound = this.walk($el, (node) => {\n\t\t\t\tvar left, right, top, bottom;\n\t\t\t\tvar elPos;\n\t\t\t\tvar elRange;\n\n\n\t\t\t\telPos = nodeBounds(node);\n\n\t\t\t\tif (this.horizontal && this.direction === \"ltr\") {\n\n\t\t\t\t\tleft = this.horizontal ? elPos.left : elPos.top;\n\t\t\t\t\tright = this.horizontal ? elPos.right : elPos.bottom;\n\n\t\t\t\t\tif( left >= start && left <= end ) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else if (right > start) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else {\n\t\t\t\t\t\t$prev = node;\n\t\t\t\t\t\tstack.push(node);\n\t\t\t\t\t}\n\n\t\t\t\t} else if (this.horizontal && this.direction === \"rtl\") {\n\n\t\t\t\t\tleft = elPos.left;\n\t\t\t\t\tright = elPos.right;\n\n\t\t\t\t\tif( right <= end && right >= start ) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else if (left < end) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else {\n\t\t\t\t\t\t$prev = node;\n\t\t\t\t\t\tstack.push(node);\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\ttop = elPos.top;\n\t\t\t\t\tbottom = elPos.bottom;\n\n\t\t\t\t\tif( top >= start && top <= end ) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else if (bottom > start) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else {\n\t\t\t\t\t\t$prev = node;\n\t\t\t\t\t\tstack.push(node);\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\n\t\t\t});\n\n\t\t\tif(found) {\n\t\t\t\treturn this.findTextStartRange(found, start, end);\n\t\t\t}\n\n\t\t}\n\n\t\t// Return last element\n\t\treturn this.findTextStartRange($prev, start, end);\n\t}\n\n\t/**\n\t * Find End Range\n\t * @private\n\t * @param {Node} root root node\n\t * @param {number} start position to start at\n\t * @param {number} end position to end at\n\t * @return {Range}\n\t */\n\tfindEnd(root, start, end){\n\t\tvar stack = [root];\n\t\tvar $el;\n\t\tvar $prev = root;\n\t\tvar found;\n\n\t\twhile (stack.length) {\n\n\t\t\t$el = stack.shift();\n\n\t\t\tfound = this.walk($el, (node) => {\n\n\t\t\t\tvar left, right, top, bottom;\n\t\t\t\tvar elPos;\n\t\t\t\tvar elRange;\n\n\t\t\t\telPos = nodeBounds(node);\n\n\t\t\t\tif (this.horizontal && this.direction === \"ltr\") {\n\n\t\t\t\t\tleft = Math.round(elPos.left);\n\t\t\t\t\tright = Math.round(elPos.right);\n\n\t\t\t\t\tif(left > end && $prev) {\n\t\t\t\t\t\treturn $prev;\n\t\t\t\t\t} else if(right > end) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else {\n\t\t\t\t\t\t$prev = node;\n\t\t\t\t\t\tstack.push(node);\n\t\t\t\t\t}\n\n\t\t\t\t} else if (this.horizontal && this.direction === \"rtl\") {\n\n\t\t\t\t\tleft = Math.round(this.horizontal ? elPos.left : elPos.top);\n\t\t\t\t\tright = Math.round(this.horizontal ? elPos.right : elPos.bottom);\n\n\t\t\t\t\tif(right < start && $prev) {\n\t\t\t\t\t\treturn $prev;\n\t\t\t\t\t} else if(left < start) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else {\n\t\t\t\t\t\t$prev = node;\n\t\t\t\t\t\tstack.push(node);\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\ttop = Math.round(elPos.top);\n\t\t\t\t\tbottom = Math.round(elPos.bottom);\n\n\t\t\t\t\tif(top > end && $prev) {\n\t\t\t\t\t\treturn $prev;\n\t\t\t\t\t} else if(bottom > end) {\n\t\t\t\t\t\treturn node;\n\t\t\t\t\t} else {\n\t\t\t\t\t\t$prev = node;\n\t\t\t\t\t\tstack.push(node);\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t});\n\n\n\t\t\tif(found){\n\t\t\t\treturn this.findTextEndRange(found, start, end);\n\t\t\t}\n\n\t\t}\n\n\t\t// end of chapter\n\t\treturn this.findTextEndRange($prev, start, end);\n\t}\n\n\t/**\n\t * Find Text Start Range\n\t * @private\n\t * @param {Node} root root node\n\t * @param {number} start position to start at\n\t * @param {number} end position to end at\n\t * @return {Range}\n\t */\n\tfindTextStartRange(node, start, end){\n\t\tvar ranges = this.splitTextNodeIntoRanges(node);\n\t\tvar range;\n\t\tvar pos;\n\t\tvar left, top, right;\n\n\t\tfor (var i = 0; i < ranges.length; i++) {\n\t\t\trange = ranges[i];\n\n\t\t\tpos = range.getBoundingClientRect();\n\n\t\t\tif (this.horizontal && this.direction === \"ltr\") {\n\n\t\t\t\tleft = pos.left;\n\t\t\t\tif( left >= start ) {\n\t\t\t\t\treturn range;\n\t\t\t\t}\n\n\t\t\t} else if (this.horizontal && this.direction === \"rtl\") {\n\n\t\t\t\tright = pos.right;\n\t\t\t\tif( right <= end ) {\n\t\t\t\t\treturn range;\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\ttop = pos.top;\n\t\t\t\tif( top >= start ) {\n\t\t\t\t\treturn range;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// prev = range;\n\n\t\t}\n\n\t\treturn ranges[0];\n\t}\n\n\t/**\n\t * Find Text End Range\n\t * @private\n\t * @param {Node} root root node\n\t * @param {number} start position to start at\n\t * @param {number} end position to end at\n\t * @return {Range}\n\t */\n\tfindTextEndRange(node, start, end){\n\t\tvar ranges = this.splitTextNodeIntoRanges(node);\n\t\tvar prev;\n\t\tvar range;\n\t\tvar pos;\n\t\tvar left, right, top, bottom;\n\n\t\tfor (var i = 0; i < ranges.length; i++) {\n\t\t\trange = ranges[i];\n\n\t\t\tpos = range.getBoundingClientRect();\n\n\t\t\tif (this.horizontal && this.direction === \"ltr\") {\n\n\t\t\t\tleft = pos.left;\n\t\t\t\tright = pos.right;\n\n\t\t\t\tif(left > end && prev) {\n\t\t\t\t\treturn prev;\n\t\t\t\t} else if(right > end) {\n\t\t\t\t\treturn range;\n\t\t\t\t}\n\n\t\t\t} else if (this.horizontal && this.direction === \"rtl\") {\n\n\t\t\t\tleft = pos.left\n\t\t\t\tright = pos.right;\n\n\t\t\t\tif(right < start && prev) {\n\t\t\t\t\treturn prev;\n\t\t\t\t} else if(left < start) {\n\t\t\t\t\treturn range;\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\ttop = pos.top;\n\t\t\t\tbottom = pos.bottom;\n\n\t\t\t\tif(top > end && prev) {\n\t\t\t\t\treturn prev;\n\t\t\t\t} else if(bottom > end) {\n\t\t\t\t\treturn range;\n\t\t\t\t}\n\n\t\t\t}\n\n\n\t\t\tprev = range;\n\n\t\t}\n\n\t\t// Ends before limit\n\t\treturn ranges[ranges.length-1];\n\n\t}\n\n\t/**\n\t * Split up a text node into ranges for each word\n\t * @private\n\t * @param {Node} root root node\n\t * @param {string} [_splitter] what to split on\n\t * @return {Range[]}\n\t */\n\tsplitTextNodeIntoRanges(node, _splitter){\n\t\tvar ranges = [];\n\t\tvar textContent = node.textContent || \"\";\n\t\tvar text = textContent.trim();\n\t\tvar range;\n\t\tvar doc = node.ownerDocument;\n\t\tvar splitter = _splitter || \" \";\n\n\t\tvar pos = text.indexOf(splitter);\n\n\t\tif(pos === -1 || node.nodeType != Node.TEXT_NODE) {\n\t\t\trange = doc.createRange();\n\t\t\trange.selectNodeContents(node);\n\t\t\treturn [range];\n\t\t}\n\n\t\trange = doc.createRange();\n\t\trange.setStart(node, 0);\n\t\trange.setEnd(node, pos);\n\t\tranges.push(range);\n\t\trange = false;\n\n\t\twhile ( pos != -1 ) {\n\n\t\t\tpos = text.indexOf(splitter, pos + 1);\n\t\t\tif(pos > 0) {\n\n\t\t\t\tif(range) {\n\t\t\t\t\trange.setEnd(node, pos);\n\t\t\t\t\tranges.push(range);\n\t\t\t\t}\n\n\t\t\t\trange = doc.createRange();\n\t\t\t\trange.setStart(node, pos+1);\n\t\t\t}\n\t\t}\n\n\t\tif(range) {\n\t\t\trange.setEnd(node, text.length);\n\t\t\tranges.push(range);\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\n\t/**\n\t * Turn a pair of ranges into a pair of CFIs\n\t * @private\n\t * @param {string} cfiBase base string for an EpubCFI\n\t * @param {object} rangePair { start: Range, end: Range }\n\t * @return {object} { start: \"epubcfi(...)\", end: \"epubcfi(...)\" }\n\t */\n\trangePairToCfiPair(cfiBase, rangePair){\n\n\t\tvar startRange = rangePair.start;\n\t\tvar endRange = rangePair.end;\n\n\t\tstartRange.collapse(true);\n\t\tendRange.collapse(false);\n\n\t\tlet startCfi = new EpubCFI(startRange, cfiBase).toString();\n\t\tlet endCfi = new EpubCFI(endRange, cfiBase).toString();\n\n\t\treturn {\n\t\t\tstart: startCfi,\n\t\t\tend: endCfi\n\t\t};\n\n\t}\n\n\trangeListToCfiList(cfiBase, columns){\n\t\tvar map = [];\n\t\tvar cifPair;\n\n\t\tfor (var i = 0; i < columns.length; i++) {\n\t\t\tcifPair = this.rangePairToCfiPair(cfiBase, columns[i]);\n\n\t\t\tmap.push(cifPair);\n\n\t\t}\n\n\t\treturn map;\n\t}\n\n\t/**\n\t * Set the axis for mapping\n\t * @param {string} axis horizontal | vertical\n\t * @return {boolean} is it horizontal?\n\t */\n\taxis(axis) {\n\t\tif (axis) {\n\t\t\tthis.horizontal = (axis === \"horizontal\") ? true : false;\n\t\t}\n\t\treturn this.horizontal;\n\t}\n}\n\nexport default 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