# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
+TYPE_TAG = peach_parser.TYPE_TAG
+TYPE_TEXT = peach_parser.TYPE_TEXT
+TYPE_COMMENT = peach_parser.TYPE_COMMENT
+TYPE_DOCTYPE = peach_parser.TYPE_DOCTYPE
+
+get_el_offset = (el) ->
+ rect = el.getBoundingClientRect()
+ doc = el.ownerDocument.documentElement
+ win = el.ownerDocument.defaultView
+ return {
+ top: rect.top + win.pageYOffset - doc.clientTop
+ left: rect.left + win.pageXOffset - doc.clientLeft
+ }
+
+# figure out the top/left coordinates of where the cursor should be if it's at
+# position ``i`` within text node ``n``
+#
+# implementation: insert a span tag where we want the cursor, and ask the
+# browser where it put that span
+cursor_to_loc = (n, i) ->
+ span = domify span: style: "height: 1em"
+ parent = n.el.parentNode
+ if i is 0
+ # cursor at start of text
+ parent.insertBefore span, n.el
+ ret = get_el_offset span
+ span.parentNode.removeChild span
+ return ret
+ else if i is n.text.length
+ # cursor at end of text
+ parent.insertBefore span, n.el.nextSibling
+ ret = get_el_offset span
+ span.parentNode.removeChild span
+ return ret
+ # cursor in middle of text
+ # split the text node
+ t0 = n.el.ownerDocument.createTextNode n.text.substr 0, i
+ t1 = n.el.ownerDocument.createTextNode n.text.substr i
+ parent.insertBefore t0, n.el
+ parent.insertBefore span, n.el
+ parent.insertBefore t1, n.el
+ parent.removeChild n.el
+ ret = get_el_offset span
+ parent.insertBefore n.el, t0
+ parent.removeChild t0
+ parent.removeChild span
+ parent.removeChild t1
+ return ret
+
+# TODO
+#loc_to_cursor = (n, i) ->
+# return top: , left:
+
+# encode text so it can be safely placed inside an html attribute
+enc_attr_regex = new RegExp '(&)|(")|(\u00A0)', 'g'
+enc_attr = (txt) ->
+ return txt.replace enc_attr_regex, (match, amp, quote) ->
+ return '&' if (amp)
+ return '"' if (quote)
+ return ' '
+
+void_elements = {
+ area: true
+ base: true
+ br: true
+ col: true
+ embed: true
+ hr: true
+ img: true
+ input: true
+ keygen: true
+ link: true
+ meta: true
+ param: true
+ source: true
+ track: true
+ wbr: true
+}
+dom_to_html = (dom) ->
+ ret = ''
+ for el in dom
+ switch el.type
+ when TYPE_TAG
+ ret += '<' + el.name
+ attr_keys = []
+ for k of el.attrs
+ attr_keys.unshift k
+ #attr_keys.sort()
+ for k in attr_keys
+ ret += " #{k}"
+ if el.attrs[k].length > 0
+ ret += "=\"#{enc_attr el.attrs[k]}\""
+ ret += '>'
+ unless void_elements[el.name]
+ if el.children.length
+ ret += dom_to_html el.children
+ ret += "</#{el.name}>"
+ when TYPE_TEXT
+ ret += el.text
+ when TYPE_COMMENT
+ ret += "<!--#{el.text}-->"
+ when TYPE_DOCTYPE
+ ret += "<!DOCTYPE #{el.name}"
+ if el.public_identifier? and el.public_identifier.length > 0
+ ret += " \"#{el.public_identifier}\""
+ if el.system_identifier? and el.system_identifier.length > 0
+ ret += " \"#{el.system_identifier}\""
+ ret += ">\n"
+ return ret
+
+domify = (h) ->
+ for tag, attrs of h
+ if tag is 'text'
+ return document.createTextNode attrs
+ el = document.createElement tag
+ for k, v of attrs
+ if k is 'children'
+ for child in v
+ el.appendChild child
+ else
+ el.setAttribute k, v
+ return el
+
+css = ''
+css += 'div#peach_html5_editor_cursor {'
+css += 'position: absolute;'
+css += 'height: 1em;'
+css += 'width: 2px;'
+css += 'margin-left: -1px;'
+css += 'margin-right: -1px;'
+css += 'background: #000;'
+css += '-webkit-animation: 1s blink step-end infinite;'
+css += 'animation: 1s blink step-end infinite;'
+css += '}'
+css += '@-webkit-keyframes "blink" {'
+css += 'from, to { background: #000; }'
+css += '50% { background: transparent; }'
+css += '}'
+css += '@keyframes "blink" {'
+css += 'from, to { background: #000; }'
+css += '50% { background: transparent; }'
+css += '}'
+
+# key codes:
+KEY_LEFT = 37
+KEY_UP = 38
+KEY_RIGHT = 39
+KEY_DOWN = 40
+KEY_BACKSPACE = 8 # <--
+KEY_DELETE = 46 # -->
+KEY_END = 35
+KEY_ENTER = 13
+KEY_ESCAPE = 27
+KEY_HOME = 36
+KEY_INSERT = 45
+KEY_PAGE_UP = 33
+KEY_PAGE_DOWN = 34
+KEY_TAB = 9
+
+instantiate_tree = (tree, parent) ->
+ for c in tree
+ switch c.type
+ when TYPE_TEXT
+ c.el = parent.ownerDocument.createTextNode c.text
+ parent.appendChild c.el
+ when TYPE_TAG
+ # TODO create in correct namespace
+ c.el = parent.ownerDocument.createElement c.name
+ for k, v of c.attrs
+ # FIXME if attr_whitelist[k]?
+ c.el.setAttribute k, v
+ parent.appendChild c.el
+ if c.children.length
+ instantiate_tree c.children, c.el
+
+find_next_cursor_position = (n, i) ->
+ if n.type is TYPE_TEXT
+ if n.text.length > i
+ return [n, i + 1]
+ return null
+ if n.type is TYPE_TAG
+ if n.children.length
+ for c in n.children
+ ret = find_next_cursor_position c, -1
+ return ret if ret?
+ return null
+ else
+ # FIXME create an empty text node if needed depending on tag name
+ return null
+
+class PeachHTML5Editor
+ constructor: (in_el, options = {}) ->
+ @in_el = in_el
+ @tree = []
+ @iframe = document.createElement('iframe')
+ @cursor = null
+ @cursor_el = null
+ @cursor_visible = false
+ opt_fragment = options.fragment ? true
+ @parser_opts = {}
+ if opt_fragment
+ @parser_opts.fragment = 'body'
+ @in_el.parentNode.appendChild @iframe
+ @idoc = @iframe.contentDocument
+
+ ignore_key_codes =
+ '18': true # alt
+ '20': true # capslock
+ '17': true # ctrl
+ '144': true # numlock
+ '16': true # shift
+ '91': true # windows "start" key
+ control_key_codes = # we react to these, but they aren't typing
+ '37': KEY_LEFT
+ '38': KEY_UP
+ '39': KEY_RIGHT
+ '40': KEY_DOWN
+ '35': KEY_END
+ '8': KEY_BACKSPACE
+ '46': KEY_DELETE
+ '13': KEY_ENTER
+ '27': KEY_ESCAPE
+ '36': KEY_HOME
+ '45': KEY_INSERT
+ '33': KEY_PAGE_UP
+ '34': KEY_PAGE_DOWN
+ '9': KEY_TAB
+
+ @idoc.body.onkeyup = (e) =>
+ return if e.ctrlKey
+ return false if ignore_key_codes[e.keyCode]?
+ #return false if control_key_codes[e.keyCode]?
+ @idoc.body.onkeydown = (e) =>
+ return if e.ctrlKey
+ return false if ignore_key_codes[e.keyCode]?
+ #return false if control_key_codes[e.keyCode]?
+ switch e.keyCode
+ when KEY_LEFT
+ return false
+ when KEY_UP
+ return false
+ when KEY_RIGHT
+ window.ce = @cursor_el
+ if @cursor?
+ new_cursor = find_next_cursor_position @cursor...
+ if new_cursor?
+ @move_cursor new_cursor
+ else
+ after = false
+ for c in @cursor[0].parent.children
+ if after
+ new_cursor = find_next_cursor_position c, -1
+ if new_cursor?
+ @move_cursor new_cursor
+ break
+ if c is @cursor[0]
+ after = true
+ else
+ for c in @tree
+ new_cursor = find_next_cursor_position c, -1
+ if new_cursor?
+ @move_cursor new_cursor
+ break
+ return false
+ when KEY_DOWN
+ return false
+ when KEY_END
+ return false
+ when KEY_BACKSPACE
+ return false
+ when KEY_DELETE
+ return false
+ when KEY_ENTER
+ return false
+ when KEY_ESCAPE
+ return false
+ when KEY_HOME
+ return false
+ when KEY_INSERT
+ return false
+ when KEY_PAGE_UP
+ return false
+ when KEY_PAGE_DOWN
+ return false
+ when KEY_TAB
+ return false
+ @idoc.body.onkeypress = (e) =>
+ return if e.ctrlKey
+ return false if ignore_key_codes[e.keyCode]?
+ # in firefox, keyCode is only set for non-typing keys
+ switch e.keyCode
+ when KEY_LEFT
+ return false
+ when KEY_UP
+ return false
+ when KEY_RIGHT
+ console.log "hi"
+ console.log @cursor
+ if @cursor?
+ new_cursor = find_next_cursor_position @cursor...
+ if new_cursor?
+ @move_cursor new_cursor
+ else
+ after = false
+ for c in @cursor[0].parent.children
+ if after
+ new_cursor = find_next_cursor_position c, -1
+ if new_cursor?
+ @move_cursor new_cursor
+ break
+ if c is @cursor[0]
+ after = true
+ else
+ for c in @tree
+ new_cursor = find_next_cursor_position c, -1
+ if new_cursor?
+ @move_cursor new_cursor
+ break
+ return false
+ when KEY_DOWN
+ return false
+ when KEY_END
+ return false
+ when KEY_BACKSPACE
+ return false
+ when KEY_DELETE
+ return false
+ when KEY_ENTER
+ return false
+ when KEY_ESCAPE
+ return false
+ when KEY_HOME
+ return false
+ when KEY_INSERT
+ return false
+ when KEY_PAGE_UP
+ return false
+ when KEY_PAGE_DOWN
+ return false
+ when KEY_TAB
+ return false
+ char = e.charCode ? e.keyCode
+ @in_el.value += String.fromCharCode char
+ @load_html @in_el.value
+ return false
+ if options.stylesheet # TODO test this
+ istyle = @idoc.createElement 'style'
+ istyle.setAttribute 'src', options.stylesheet
+ @idoc.head.appendChild istyle
+ icss = @idoc.createElement 'style'
+ icss.appendChild @idoc.createTextNode css
+ @idoc.head.appendChild icss
+ @load_html @in_el.value
+ clear_dom: ->
+ # FIXME add parent node, so we don't empty body and delete cursor_el
+ while @idoc.body.childNodes.length
+ @idoc.body.removeChild @idoc.body.childNodes[0]
+ @cursor_visible = false
+ return
+ load_html: (html) ->
+ @tree = peach_parser.parse html, @parser_opts
+ #as_html = dom_to_html @tree
+ #@iframe.contentDocument.body.innerHTML = as_html
+ @clear_dom()
+ instantiate_tree @tree, @idoc.body
+ move_cursor: (cursor) ->
+ @cursor = cursor
+ unless @cursor_el?
+ @cursor_el = domify div: id: 'peach_html5_editor_cursor'
+ unless @cursor_visible
+ @idoc.body.appendChild @cursor_el
+ @cursor_visible = true
+ # TODO figure out top/left coords for cursor
+ loc = cursor_to_loc cursor[0], cursor[1]
+ @cursor_el.style.top = "#{loc.top}px"
+ @cursor_el.style.left = "#{loc.left}px"
+
+window.peach_html5_editor = (args...) ->
+ return new PeachHTML5Editor args...
+
+# test in browser: peach_html5_editor(document.getElementsByTagName('textarea')[0])
Got questions, comments, patches, etc.? Contact Jason Woofenden