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) ->
- rect = el.getBoundingClientRect()
+ 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
h: rect.height ? (rect.top - rect.bottom)
}
-# figure out the top/left coordinates of where the cursor should be if it's at
+is_display_block = (el) ->
+ if el.currentStyle?
+ return el.currentStyle.display is 'block'
+ else
+ return window.getComputedStyle(el, null).getPropertyValue('display') is 'block'
+
+# 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``
-#
-# 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; border-left: 1px solid black; margin-left: -1px"
- parent = n.el.parentNode
- els = []
- txts = []
- plus_width = false
- if n.text.length < 2
- bounds = get_el_offset n.el
- if i is 1
- plus_width = true
+# 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
- if i is 0 # cursor at start of text
- check_i = 0
- txts.push n.text.substr 0, 1
- txts.push n.text.substr 1
- else if i is n.text.length # cursor at end of text
- check_i = 1
- plus_width = true
- txts.push n.text.substr 0, n.text.length - 1
- txts.push n.text.substr n.text.length - 1
- else
- check_i = 1
- txts.push n.text.substr 0, i
- txts.push n.text.substr i, 1
- txts.push n.text.substr i + 1
- for txt, txt_i in txts
- el = n.el.ownerDocument.createTextNode txt
- if txt_i is check_i
- span = n.el.ownerDocument.createElement 'span'
- span.appendChild el
- el = span
- els.push el
- parent.insertBefore el, n.el
- parent.removeChild n.el
- bounds = get_el_bounds els[check_i]
- parent.insertBefore n.el, els[0]
- for el in els
- parent.removeChild el
- ret = top: bounds.y, left: bounds.x
- if plus_width
- ret.left += bounds.w
- # fudge case where bounds are BS because we're on non-significant whitespace
- if i > 0
- first = cursor_to_loc n, 0
- if ret.left <= first.left
- # no need for a loop here, because recursion
- ret = cursor_to_loc n, i - 1
+ ret = text_range_bounds n.el, i, i + 1
+ if ret?
+ debug_dot_at n.el.ownerDocument, ret.x, ret.y
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) ->
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 += '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 += 'from, to { background: #000; }'
-css += '50% { background: transparent; }'
+css += '@-webkit-keyframes blink {'
+css += 'to { visibility: hidden; }'
css += '}'
-css += '@keyframes "blink" {'
-css += 'from, to { background: #000; }'
-css += '50% { background: transparent; }'
+css += '@keyframes blink {'
+css += 'to { visibility: hidden; }'
css += '}'
# key codes:
traverse_tree c.children, state, cb
break if state.done?
return state
-# find the next element in top (and decendants) that is after n and can contain text
+# 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 = (top, n, i) ->
+find_next_cursor_position = (tree, n, i) ->
if n? and n.type is TYPE_TEXT and n.text.length > i
- return [n, i + 1]
- found = traverse_tree top, before: n?, (node, state) ->
+ 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
return null
# TODO make it so cursor can go places that don't have text but could
-find_prev_cursor_position = (top, n, i) ->
+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 top, before: n?, (node, state) ->
+ found = traverse_tree tree, before: n?, (node, state) ->
if node.type is TYPE_TEXT
unless n?
state.node = 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
+
+# pass a array of nodes (from parser library, ie it should have .el and .text)
+tree_dedup_space = (tree) ->
+ prev = cur = next = null
+ prev_i = cur_i = next_i = 0
+ prev_pos = pos = next_pos = null
+ prev_px = cur_px = next_px = null
+ first = true
+ removed_char = null
+
+ iterate = (tree, cb) ->
+ for n in tree
+ if n.type is TYPE_TEXT
+ i = 0
+ while i < n.text.length # don't foreach, cb might remove chars
+ removed = cb n, i
+ unless removed
+ i += 1
+ if n.type is TYPE_TAG
+ block = is_display_block n.el
+ if block
+ cb null
+ if n.children.length > 0
+ iterate n.children, cb
+ if block
+ cb null
+ # remove cur char
+ remove = ->
+ removed_char = cur.text.charAt(cur_i)
+ cur.el.textContent = cur.text = (cur.text.substr 0, cur_i) + (cur.text.substr cur_i + 1)
+ if next is cur # in same text node
+ if next_i is 0
+ throw "how is this possible?"
+ next_i -= 1
+ return true
+ # undo remove()
+ put_it_back = ->
+ cur.el.textContent = cur.text = (cur.text.substr 0, cur_i) + removed_char + (cur.text.substr cur_i)
+ if next is cur # in same text node
+ next_i += 1
+ return false
+ # return true if cur was removed from the dom (ie re-use same prev)
+ operate = ->
+ # cur definitately set
+ # prev and/or next might be null, indicating the start/end of a display:block
+ return false unless is_space_code cur.text.charCodeAt cur_i
+ bounds = text_range_bounds cur.el, cur_i, cur_i + 1
+ # consistent cases:
+ # 1. zero rects returned by getClientRects() means collapsed space
+ if bounds is null
+ return remove()
+ # 2. width greater than zero means visible space
+ if bounds.w > 0
+ return false
+ # now the weird edge cases...
+ #
+ # firefox and chromium both report zero width for characters at the end
+ # of a line where the text wraps (automatically, due to word-wrap) to
+ # the next line. These do not appear to be distinguishable from
+ # collapsed spaces via the range/bounds api, so...
+ #
+ # remove it from the dom, and if prev or next moves, put it back.
+ if prev? and not prev_px?
+ prev_px = cursor_to_xyh prev, prev_i
+ if next? and not next_px?
+ next_px = cursor_to_xyh next, next_i
+ #if prev is null and next is null
+ # parent_px = cur.parent.el.getBoundingClientRect()
+ remove()
+ if prev?
+ if prev_px?
+ new_prev_px = cursor_to_xyh prev, prev_i
+ if new_prev_px.x isnt prev_px.x or new_prev_px.y isnt prev_px.y
+ return put_it_back()
+ else
+ console.log "this shouldn't happen, we remove spaces that don't locate"
+ if next?
+ if next_px?
+ new_next_px = cursor_to_xyh next, next_i
+ if new_next_px.x isnt next_px.x or new_next_px.y isnt next_px.y
+ return put_it_back()
+ #else
+ # console.log "removing space becase space after it is collapsed"
+ # if there's no prev or next (single space inside a block-level element?) check
+ # TODO scrapt this, or fix it so it works when there's no parent
+ # if prev is null and next is null
+ # new_parent_px = cur.parent.el.getBoundingClientRect()
+ # if new_parent_px.left isnt parent_px.left or new_parent_px.top isnt parent_px.top or new_parent_px.right isnt parent_px.right or new_parent_px.bottom isnt parent_px.bottom
+ # console.log "WEIRD: parent moved"
+ # return put_it_back()
+ # we didn't put it back
+ return true
+ # pass null at start/end of display:block
+ queue = (n, i) ->
+ next = n
+ next_i = i
+ next_px = null
+ if cur?
+ removed = operate()
+ else
+ removed = false
+ unless removed
+ prev = cur
+ prev_i = cur_i
+ prev_px = cur_px
+ cur = next
+ cur_i = next_i
+ cur_px = next_px
+ return removed
+ queue null
+ iterate tree, queue
+ queue null
+
class PeachHTML5Editor
constructor: (in_el, options = {}) ->
@in_el = in_el
'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]?
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
@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'
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
+ tree_dedup_space @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) ->
- return if @cursor? and cursor? and @cursor[0] is cursor[0] and @cursor[1] is cursor[1]
+ 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 = domify div: id: 'peach_html5_editor_cursor'
@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"
+ # 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...
Got questions, comments, patches, etc.? Contact Jason Woofenden