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document.coffee
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document.coffee
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class TandemDocument
@INDENT_PREFIX: 'indent-'
@normalizeHtml: (root, options = {}) ->
if root.childNodes.length == 0
div = root.ownerDocument.createElement('div')
return root.appendChild(div)
_.each(_.clone(root.childNodes), (child) =>
if child.nodeType != child.ELEMENT_NODE
Tandem.Utils.removeNode(child)
else if options.ignoreDirty || child.classList.contains(Tandem.Line.DIRTY_CLASS) || true
# TODO editor.update should mark dirty lines
Tandem.Line.wrapText(child)
Tandem.Line.normalizeHtml(child)
)
constructor: (@root) ->
this.buildLines()
appendLine: (lineNode) ->
return this.insertLineBefore(lineNode, null)
applyAttribute: (index, length, attr, value) ->
this.applyToLines(index, length, (line, offset, length) =>
line.applyAttribute(offset, length, attr, value)
this.updateLine(line)
)
buildLines: ->
this.reset()
TandemDocument.normalizeHtml(@root, {ignoreDirty: true})
this.rebuild()
cleanNode: (lineNode) ->
return if lineNode.classList.contains(Tandem.Constants.SPECIAL_CLASSES.EXTERNAL)
line = this.findLine(lineNode)
if line? && this.updateLine(line)
lineNode.classList.remove(Tandem.Line.DIRTY_CLASS)
return true
return false
applyToLines: (index, length, fn) ->
[startLine, startOffset] = this.findLineAtOffset(index)
[endLine, endOffset] = this.findLineAtOffset(index + length)
if startLine == endLine
fn(startLine, startOffset, endOffset - startOffset)
else
curLine = startLine.next
fn(startLine, startOffset, startLine.length + 1 - startOffset)
while curLine? && curLine != endLine
next = curLine.next
fn(curLine, 0, curLine.length + 1)
curLine = next
fn(endLine, 0, endOffset)
deleteText: (index, length) ->
if index + length == @length
@trailingNewline = false
@length -= 1
length -= 1
return if length <= 0
firstLine = lastLine = null
this.applyToLines(index, length, (line, offset, length) =>
firstLine = line unless firstLine?
lastLine = line
if offset == 0 && length == line.length + 1
Tandem.Utils.removeNode(line.node)
else
line.deleteText(offset, length)
this.updateLine(line)
)
if firstLine != lastLine and this.findLine(firstLine.node) and this.findLine(lastLine.node)
Tandem.Utils.mergeNodes(firstLine.node, lastLine.node)
this.updateLine(firstLine)
this.removeLine(lastLine)
findLeaf: (node) ->
lineNode = node.parentNode
while lineNode? && !Tandem.Line.isLineNode(lineNode)
lineNode = lineNode.parentNode
return null if !lineNode?
line = this.findLine(lineNode)
return line.findLeaf(node)
findLine: (node) ->
node = this.findLineNode(node)
if node?
return @lineMap[node.id]
else
return null
findLineAtOffset: (offset) ->
retLine = @lines.first
_.all(@lines.toArray(), (line, index) =>
retLine = line
if offset < line.length + 1
return false
else
offset -= (line.length + 1) if index < @lines.length - 1
return true
)
return [retLine, offset]
findLineNode: (node) ->
while node? && !Tandem.Line.isLineNode(node)
node = node.parentNode
return node
forceTrailingNewline: ->
unless @trailingNewline
if @lines.length > 1 && @lines.last.length == 0
Tandem.Utils.removeNode(@lines.last.node)
this.removeLine(@lines.last)
@trailingNewline = true
@length += 1
insertLineBefore: (newLineNode, refLine) ->
line = new Tandem.Line(this, newLineNode)
if refLine != null
@lines.insertAfter(refLine.prev, line)
else
@lines.append(line)
@lineMap[line.id] = line
@length += line.length
@length += 1 if @lines.length > 1
return line
insertText: (index, text) ->
[line, lineOffset] = this.findLineAtOffset(index)
textLines = text.split("\n")
if index == @length && @trailingNewline
@trailingNewline = false
@length -= 1 # Doc did not get shorter but _.each loop compensates
_.each(textLines, (textLine) =>
contents = this.makeLineContents(textLine)
div = @root.ownerDocument.createElement('div')
_.each(contents, (content) ->
div.appendChild(content)
)
@root.appendChild(div)
this.appendLine(div)
)
else if textLines.length == 1
contents = this.makeLineContents(text)
this.insertContentsAt(line, lineOffset, contents)
else
[line1, line2] = this.insertNewlineAt(line, lineOffset)
contents = this.makeLineContents(textLines[0])
this.insertContentsAt(line1, lineOffset, contents)
contents = this.makeLineContents(textLines[textLines.length - 1])
this.insertContentsAt(line2, 0, contents)
if textLines.length > 2
_.each(textLines.slice(1, -1), (lineText) =>
lineNode = this.makeLine(lineText)
@root.insertBefore(lineNode, line2.node)
this.insertLineBefore(lineNode, line2)
)
makeLine: (text) ->
lineNode = @root.ownerDocument.createElement('div')
lineNode.classList.add(Tandem.Line.CLASS_NAME)
contents = this.makeLineContents(text)
_.each(contents, (content) ->
lineNode.appendChild(content)
)
return lineNode
makeLineContents: (text) ->
strings = text.split("\t")
contents = []
_.each(strings, (str, strIndex) =>
contents.push(this.makeText(str)) if str.length > 0
if strIndex < strings.length - 1
contents.push(this.makeTab())
)
return contents
makeTab: ->
tab = @root.ownerDocument.createElement('span')
tab.classList.add(Tandem.Leaf.TAB_NODE_CLASS)
tab.classList.add(Tandem.Constants.SPECIAL_CLASSES.ATOMIC)
tab.textContent = "\t"
return tab
makeText: (text) ->
node = @root.ownerDocument.createElement('span')
node.textContent = text
return node
# insertContentsAt: (Number startIndex, String text) ->
# insertContentsAt: (TandemRange startIndex, String text) ->
insertContentsAt: (line, offset, contents) ->
return if contents.length == 0
[leaf, leafOffset] = line.findLeafAtOffset(offset)
if leaf.node.nodeName != 'BR'
[beforeNode, afterNode] = line.splitContents(offset)
parentNode = beforeNode?.parentNode || afterNode?.parentNode
_.each(contents, (content) ->
parentNode.insertBefore(content, afterNode)
)
else
parentNode = leaf.node.parentNode
Tandem.Utils.removeNode(leaf.node)
_.each(contents, (content) ->
parentNode.appendChild(content)
)
this.updateLine(line)
insertNewlineAt: (line, offset) ->
if offset == 0 or offset == line.length
div = @root.ownerDocument.createElement('div')
if offset == 0
@root.insertBefore(div, line.node)
newLine = this.insertLineBefore(div, line)
return [newLine, line]
else
refLine = line.next
refLineNode = if refLine? then refLine.node else null
@root.insertBefore(div, refLineNode)
newLine = this.insertLineBefore(div, refLine)
return [line, newLine]
else
newLine = this.splitLine(line, offset)
return [line, newLine]
rebuild: ->
this.reset()
_.each(@root.childNodes, (node) =>
this.appendLine(node)
)
rebuildDirty: ->
# First and last nodes are always dirty to handle edge cases
@root.firstChild.classList.add(Tandem.Line.DIRTY_CLASS)
@root.lastChild.classList.add(Tandem.Line.DIRTY_CLASS)
dirtyNodes = _.clone(@root.getElementsByClassName(Tandem.Line.DIRTY_CLASS))
_.each((dirtyNodes), (lineNode, index) =>
this.cleanNode(lineNode)
prevNode = lineNode.previousSibling
nextNode = lineNode.nextSibling
while prevNode? && prevNode != dirtyNodes[index - 1]
this.cleanNode(prevNode)
prevNode = prevNode.previousSibling
while nextNode? && nextNode != dirtyNodes[index + 1]
this.cleanNode(nextNode)
nextNode = nextNode.nextSibling
)
removeLine: (line) ->
delete @lineMap[line.id]
@lines.remove(line)
@length -= line.length
@length -= 1 if @lines.length >= 1
reset: ->
@lines = new LinkedList()
@lineMap = {}
@length = 1
@trailingNewline = true
splitLine: (line, offset) ->
[lineNode1, lineNode2] = Tandem.Utils.splitNode(line.node, offset, true)
line.node = lineNode1
this.updateLine(line)
return this.insertLineBefore(lineNode2, line.next)
toDelta: ->
lines = @lines.toArray()
deltas = _.flatten(_.map(lines, (line, index) ->
deltas = JetDelta.copy(line.delta).deltas
deltas.push(new JetInsert("\n", line.attributes)) if index < lines.length - 1
return deltas
), true)
attributes = if @lines.last? then @lines.last.attributes else {}
deltas.push(new JetInsert("\n", attributes)) if @trailingNewline
delta = new JetDelta(0, @length, deltas)
delta.compact()
return delta
updateDirty: ->
dirtyNodes = @root.ownerDocument.getElementsByClassName(Tandem.Line.DIRTY_CLASS)
fixLines = false
_.each(dirtyNodes, (dirtyNode) =>
line = this.findLine(dirtyNode)
if line?
this.updateLine(line)
fixLines = true if line.attributes['list']?
)
updateLine: (line) ->
@length -= line.length
didRebuild = line.rebuild()
@length += line.length
return didRebuild
window.Tandem ||= {}
window.Tandem.Document = TandemDocument