# 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
+
+debug_dot_at = (doc, x, y) ->
+ el = doc.createElement 'div'
+ el.setAttribute 'style', "position: absolute; left: #{x}px; top: #{y}px; width: 1px; height: 3px; background-color: red"
+ doc.body.appendChild el
+ #console.log(new Error().stack)
+
+# text nodes don't have getBoundingClientRect(), so use selection api to find
+# it.
+get_el_bounds = (el) ->
+ if el.getBoundingClientRect?
+ rect = el.getBoundingClientRect()
+ else
+ # text nodes don't have getBoundingClientRect(), so use range api
+ range = el.ownerDocument.createRange()
+ range.selectNodeContents el
+ rect = range.getBoundingClientRect()
+ doc = el.ownerDocument.documentElement
+ win = el.ownerDocument.defaultView
+ y_fix = win.pageYOffset - doc.clientTop
+ x_fix = win.pageXOffset - doc.clientLeft
+ return {
+ x: rect.left + x_fix
+ y: rect.top + y_fix
+ w: rect.width ? (rect.right - rect.left)
+ h: rect.height ? (rect.top - rect.bottom)
+ }
+
+# Warning: currently assumes you're asking about a single character
+# Note: chromium returns multiple bounding rects for a space at a line-break
+# Note: chromium's getBoundingClientRect() is broken (when zero-area client rects)
+# Note: sometimes returns null (eg for whitespace that is not visible)
+text_range_bounds = (el, start, end) ->
+ range = document.createRange()
+ range.setStart el, start
+ range.setEnd el, end
+ rects = range.getClientRects()
+ if rects.length > 0
+ rect = rects[0]
+ else
+ return null
+ doc = el.ownerDocument.documentElement
+ win = el.ownerDocument.defaultView
+ y_fix = win.pageYOffset - doc.clientTop
+ x_fix = win.pageXOffset - doc.clientLeft
+ return {
+ x: rect.left + x_fix
+ y: rect.top + y_fix
+ w: rect.width ? (rect.right - rect.left)
+ h: rect.height ? (rect.top - rect.bottom)
+ rects: rects
+ bounding: range.getBoundingClientRect()
+ }
+
+# figure out the x/y coordinates of where the cursor should be if it's at
+# position ``i`` within text node ``n``
+# sometimes returns null (eg for whitespace that is not visible)
+window.cursor_to_xyh = cursor_to_xyh = (n, i) ->
+ range = document.createRange()
+ if n.text.length is 0
+ ret = text_range_bounds n.el, 0, 0
+ if i is n.text.length
+ ret = text_range_bounds n.el, i - 1, i
+ if ret?
+ ret.x += ret.w
+ else
+ ret = text_range_bounds n.el, i, i + 1
+ if ret?
+ debug_dot_at n.el.ownerDocument, ret.x, ret.y
+ return ret
+
# encode text so it can be safely placed inside an html attribute
enc_attr_regex = new RegExp '(&)|(")|(\u00A0)', 'g'
enc_attr = (txt) ->
ret = ''
for el in dom
switch el.type
- when wheic_parser.TYPE_TAG
+ when TYPE_TAG
ret += '<' + el.name
attr_keys = []
for k of el.attrs
- attr_keys.push k
- attr_keys.sort()
+ attr_keys.unshift k
+ #attr_keys.sort()
for k in attr_keys
- ret += " #{k}=\"#{enc_attr el.attrs[k]}\""
+ ret += " #{k}"
+ if el.attrs[k].length > 0
+ ret += "=\"#{enc_attr el.attrs[k]}\""
ret += '>'
- unless ret.name in void_elements
+ unless void_elements[el.name]
if el.children.length
ret += dom_to_html el.children
ret += "</#{el.name}>"
- when wheic_parser.TYPE_TEXT
+ when TYPE_TEXT
ret += el.text
- when wheic_parser.TYPE_COMMENT
+ when TYPE_COMMENT
ret += "<!--#{el.text}-->"
- when wheic_parser.TYPE_DOCTYPE
+ 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
-wysiwyg = (el, options = {}) ->
- opt_fragment = options.fragment ? true
- parser_opts = {}
- if opt_fragment
- parser_opts.fragment = 'body'
- editor_instance = dom: wheic_parser.parse(el.value, parser_opts)
- # el.value = dom_to_html dom
- return editor_instance
-
-window.wheic = {
- wysiwyg: wysiwyg
- dom_to_html: dom_to_html
-}
+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: #444;'
+css += '-webkit-animation: blink 1s steps(2, start) infinite;'
+css += 'animation: blink 1s steps(2, start) infinite;'
+css += '}'
+css += '@-webkit-keyframes blink {'
+css += 'to { visibility: hidden; }'
+css += '}'
+css += '@keyframes blink {'
+css += 'to { visibility: hidden; }'
+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
+
+traverse_tree = (tree, state, cb) ->
+ for c in tree
+ cb c, state
+ break if state.done?
+ if c.children.length
+ traverse_tree c.children, state, cb
+ break if state.done?
+ return state
+# find the next element in tree (and decendants) that is after n and can contain text
+# TODO make it so cursor can go places that don't have text but could
+find_next_cursor_position = (tree, n, i) ->
+ if n? and n.type is TYPE_TEXT and n.text.length > i
+ orig_xyh = cursor_to_xyh n, i
+ unless orig_xyh?
+ console.log "ERROR: couldn't find xy for current cursor location"
+ return
+ for next_i in [i+1 .. n.text.length] # inclusive is valid (after last char)
+ next_xyh = cursor_to_xyh n, next_i
+ if next_xyh?
+ if next_xyh.x > orig_xyh.x or next_xyh.y > orig_xyh.y
+ return [n, next_i]
+ found = traverse_tree tree, before: n?, (node, state) ->
+ if node.type is TYPE_TEXT and state.before is false
+ state.node = node
+ state.done = true
+ if node is n
+ state.before = false
+ if found.node?
+ return [found.node, 0]
+ return null
+
+# TODO make it so cursor can go places that don't have text but could
+find_prev_cursor_position = (tree, n, i) ->
+ if n? and n.type is TYPE_TEXT and i > 0
+ orig_xyh = cursor_to_xyh n, i
+ unless orig_xyh?
+ console.log "ERROR: couldn't find xy for current cursor location"
+ return
+ for prev_i in [i-1 .. 0]
+ prev_xyh = cursor_to_xyh n, prev_i
+ if prev_xyh?
+ if prev_xyh.x < orig_xyh.x or prev_xyh.y < orig_xyh.y
+ return [n, prev_i]
+ return [n, i - 1]
+ found = traverse_tree tree, before: n?, (node, state) ->
+ if node.type is TYPE_TEXT
+ unless n?
+ state.node = node
+ state.done = true
+ if node is n
+ if state.prev?
+ state.node = state.prev
+ state.done = true
+ if node
+ state.prev = node
+ if found.node?
+ return [found.node, found.node.text.length]
+ return null
+
+find_loc_cursor_position = (tree, loc) ->
+ for c in tree
+ if c.type is TYPE_TAG or c.type is TYPE_TEXT
+ bounds = get_el_bounds c.el
+ continue if loc.x < bounds.x
+ continue if loc.x > bounds.x + bounds.w
+ continue if loc.y < bounds.y
+ continue if loc.y > bounds.y + bounds.h
+ if c.children.length
+ ret = find_loc_cursor_position c.children, loc
+ return ret if ret?
+ if c.type is TYPE_TEXT
+ # click is within bounding box that contains all text.
+ return [c, 0] if c.text.length is 0
+ before_i = 0
+ before = cursor_to_xyh c, before_i
+ unless before?
+ console.log "error: failed to find cursor pixel location for start of", c
+ return
+ after_i = c.text.length
+ after = cursor_to_xyh c, after_i
+ unless after?
+ console.log "error: failed to find cursor pixel location for end of", c
+ return
+ if loc.y < before.y + before.h and loc.x < before.x
+ # console.log 'before first char on first line'
+ continue
+ if loc.y > after.y and loc.x > after.x
+ # console.log 'after last char on last line'
+ continue
+ if loc.y < before.y
+ console.log "Warning: click in bounding box but above first line"
+ continue # above first line (runaround?)
+ if loc.y > after.y + after.h
+ console.log "Warning: click in bounding box but below last line", loc.y, after.y, after.h
+ continue # below last line (shouldn't happen?)
+ while after_i - before_i > 1
+ cur_i = Math.round((before_i + after_i) / 2)
+ cur = cursor_to_xyh c, cur_i
+ unless loc?
+ console.log "error: failed to find cursor pixel location for", c, cur_i
+ return
+ if loc.y < cur.y or (loc.y <= cur.y + cur.h and loc.x < cur.x)
+ after_i = cur_i
+ after = cur
+ else
+ before_i = cur_i
+ before = cur
+ # which one is closest?
+ if Math.abs(before.x - loc.x) < Math.abs(after.x - loc.x)
+ return [c, before_i]
+ else
+ return [c, after_i]
+ return null
+
+# browsers collapse these (html5 spec calls these "space characters")
+is_space_code = (char_code) ->
+ switch char_code
+ when 9, 10, 12, 13, 32
+ return true
+ return false
+is_space = (chr) ->
+ return is_space_code chr.charCodeAt 0
+
+# warning: contains browser-specific hackery
+is_space_significant = (n, i) ->
+ range = document.createRange()
+ range.setStart n.el, i
+ range.setEnd n.el, i + 1
+ rects = range.getClientRects()
+ bounding_rect = range.getBoundingClientRect()
+ if rects.length is 0
+ return false
+ if rects.length > 1
+ # chromium returns two rects in both these cases:
+ # 1. a space that is word-wrapped. one rect on each line. Note that
+ # chromium does _not_ do this for _all_ spaces that are word wrapped.
+ # 2. the last (insignificant) space in a sequence of collapsing spaces
+ # in this case the rects are identical.
+ if rects[1].top > rects[0].top
+ return true
+ width = rects[0].width ? (rects[0].right - rects[0].left)
+ if width > 0
+ return true
+ # firefox reports the space that's word-wrapped as zero width
+ if n.text.length > i + 1
+ range.setStart n.el, i + 1
+ range.setEnd n.el, i + 2
+ next_rects = range.getClientRects()
+ if next_rects.length > 0
+ if next_rects[0].top > rects[0].top
+ # next character is lower on the screen, so this must be a word-wrap space
+ return true
+ else
+ # FIXME detect word-wrap in last character
+ # could be followed by an inline block with no starting space
+ # FIXME chromium gets here for a significant space at the begining of a
+ # text node that word-wraps
+ return false
+
+# pass a node (from parser library, ie it should have .el and .text)
+remove_insignificant_whitespace = (n) ->
+ changed = false
+ if n.type is TYPE_TEXT
+ i = 0
+ while i < n.text.length
+ if is_space_code n.text.charCodeAt i
+ if is_space_significant n, i
+ i += 1
+ else
+ n.el.textContent = n.text = (n.text.substr 0, i) + (n.text.substr i + 1)
+ changed = true
+ else
+ i += 1
+ if n.children.length > 0
+ for c in n.children
+ if remove_insignificant_whitespace c
+ changed = true
+ return changed
+
+class PeachHTML5Editor
+ constructor: (in_el, options = {}) ->
+ @in_el = in_el
+ @tree = []
+ @iframe = domify iframe: class: 'peach_html5_editor'
+ @cursor = null
+ @cursor_el = null
+ @cursor_visible = false
+ opt_fragment = options.fragment ? true
+ @parser_opts = {}
+ if opt_fragment
+ @parser_opts.fragment = 'body'
+
+ @iframe.onload = =>
+ @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.onclick = (e) =>
+ # idoc.body.offset().left/top
+ new_cursor = find_loc_cursor_position @tree, x: e.pageX, y: e.pageY
+ if new_cursor?
+ @move_cursor new_cursor
+ @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
+ if @cursor?
+ new_cursor = find_prev_cursor_position @tree, @cursor...
+ if new_cursor?
+ @move_cursor new_cursor
+ else
+ for c in @tree
+ new_cursor = find_next_cursor_position @tree, c, -1
+ if new_cursor?
+ @move_cursor new_cursor
+ break
+ return false
+ when KEY_UP
+ return false
+ when KEY_RIGHT
+ if @cursor?
+ new_cursor = find_next_cursor_position @tree, @cursor...
+ if new_cursor?
+ @move_cursor new_cursor
+ else
+ for c in @tree
+ new_cursor = find_prev_cursor_position @tree, 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 unless @cursor?
+ return false unless @cursor[1] > 0
+ @cursor[0].text = @cursor[0].text.substr(0, @cursor[1] - 1) + @cursor[0].text.substr(@cursor[1])
+ @cursor[0].el.nodeValue = @cursor[0].text
+ @move_cursor [@cursor[0], @cursor[1] - 1]
+ return false
+ when KEY_DELETE
+ return false unless @cursor?
+ return false unless @cursor[1] < @cursor[0].text.length
+ @cursor[0].text = @cursor[0].text.substr(0, @cursor[1]) + @cursor[0].text.substr(@cursor[1] + 1)
+ @cursor[0].el.nodeValue = @cursor[0].text
+ @move_cursor [@cursor[0], @cursor[1]]
+ 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]?
+ return false if control_key_codes[e.keyCode]? # handled in keydown
+ char = e.charCode ? e.keyCode
+ if char and @cursor?
+ char = String.fromCharCode char
+ if @cursor[1] is 0
+ @cursor[0].text = char + @cursor[0].text
+ else if @cursor[1] is @cursor[0].text.length - 1
+ @cursor[0].text += char
+ else
+ @cursor[0].text =
+ @cursor[0].text.substr(0, @cursor[1]) +
+ char +
+ @cursor[0].text.substr(@cursor[1])
+ @cursor[0].el.nodeValue = @cursor[0].text
+ @move_cursor [@cursor[0], @cursor[1] + 1]
+ @changed()
+ 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
+
+ @in_el.parentNode.appendChild @iframe
+ 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
+ @clear_dom()
+ instantiate_tree @tree, @idoc.body
+ remove_insignificant_whitespace type: TYPE_TAG, children: @tree
+ @changed()
+ changed: ->
+ # FIXME don't export cursor placeholder (when cursor is between space characters)
+ @in_el.onchange = null
+ @in_el.value = dom_to_html @tree
+ @in_el.onchange = =>
+ @load_html @in_el.value
+ move_cursor: (cursor) ->
+ loc = cursor_to_xyh cursor[0], cursor[1]
+ unless loc?
+ console.log "error: tried to move cursor to position that has no pixel location", cursor[0], cursor[1]
+ return
+ @cursor = cursor
+ # replace cursor, to reset blink animation
+ if @cursor_visible
+ @cursor_el.parentNode.removeChild @cursor_el
+ @cursor_el = domify div: id: 'peach_html5_editor_cursor'
+ @idoc.body.appendChild @cursor_el
+ @cursor_visible = true
+ # TODO figure out x,y coords for cursor
+ @cursor_el.style.left = "#{loc.x}px"
+ @cursor_el.style.top = "#{loc.y}px"
+
+window.peach_html5_editor = (args...) ->
+ return new PeachHTML5Editor args...
-# test in browser: wheic(document.getElementsByTagName('textarea')[0])
+# test in browser: peach_html5_editor(document.getElementsByTagName('textarea')[0])
Got questions, comments, patches, etc.? Contact Jason Woofenden