# 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/>.
+# SETTINGS
+overlay_padding = 6 # TODO generate css from this
+
TYPE_TAG = peach_parser.TYPE_TAG
TYPE_TEXT = peach_parser.TYPE_TEXT
TYPE_COMMENT = peach_parser.TYPE_COMMENT
h: rect.height ? (rect.top - rect.bottom)
}
+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)
return '&' if (amp)
return '"' if (quote)
return ' '
+enc_text_regex = new RegExp '(&)|(<)|(\u00A0)', 'g'
+enc_text = (txt) ->
+ return txt.replace enc_text_regex, (match, amp, lt) ->
+ return '&' if (amp)
+ return '<' if (lt)
+ return ' '
void_elements = {
area: true
ret += dom_to_html el.children
ret += "</#{el.name}>"
when TYPE_TEXT
- ret += el.text
+ ret += enc_text el.text
when TYPE_COMMENT
ret += "<!--#{el.text}-->"
when TYPE_DOCTYPE
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 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
-# 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
+ 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
+ advance = cb n, i
+ if advance
+ 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
- i += 1
- if n.children.length > 0
- for c in n.children
- if remove_insignificant_whitespace c
- changed = true
- return changed
+ 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
+ advance = true
+ if cur?
+ removed = operate()
+ # don't advance (to the next character next time) if we removed a
+ # character from the same text node as ``next``, because doing so
+ # renumbers the indexes in that string
+ if removed and cur is next
+ advance = false
+ 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 advance
+ queue null
+ iterate tree, queue
+ queue null
class PeachHTML5Editor
constructor: (in_el, options = {}) ->
@in_el = in_el
@tree = []
- @iframe = domify iframe: class: 'peach_html5_editor'
+ @outer_el = domify div: class: 'peach_html5_editor', children: [
+ @iframe = domify iframe: class: 'peach_html5_editor_iframe'
+ @overlay = domify div: class: 'peach_html5_editor_overlay'
+ ]
@cursor = null
@cursor_el = null
@cursor_visible = false
'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
+ @overlay.onclick = (e) =>
+ x = (e.offsetX ? e.layerX) - overlay_padding
+ y = (e.offsetY ? e.layerY) - overlay_padding
+ new_cursor = find_loc_cursor_position @tree, x: x, y: y
if new_cursor?
@move_cursor new_cursor
@idoc.body.onkeyup = (e) =>
@idoc.head.appendChild istyle
icss = @idoc.createElement 'style'
icss.appendChild @idoc.createTextNode css
- @idoc.head.appendChild icss
+ document.head.appendChild icss
@load_html @in_el.value
- @in_el.parentNode.appendChild @iframe
+ @in_el.parentNode.appendChild @outer_el
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]
+ @kill_cursor()
@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
+ tree_dedup_space @tree
@changed()
changed: ->
# FIXME don't export cursor placeholder (when cursor is between space characters)
@in_el.value = dom_to_html @tree
@in_el.onchange = =>
@load_html @in_el.value
+ kill_cursor: -> # remove it, forget where it was
+ if @cursor_visible
+ @cursor_el.parentNode.removeChild @cursor_el
+ @cursor_visible = false
+ @cursor = null
move_cursor: (cursor) ->
loc = cursor_to_xyh cursor[0], cursor[1]
unless loc?
if @cursor_visible
@cursor_el.parentNode.removeChild @cursor_el
@cursor_el = domify div: id: 'peach_html5_editor_cursor'
- @idoc.body.appendChild @cursor_el
+ @overlay.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"
+ @cursor_el.style.left = "#{loc.x + overlay_padding}px"
+ @cursor_el.style.top = "#{loc.y + overlay_padding}px"
window.peach_html5_editor = (args...) ->
return new PeachHTML5Editor args...
Got questions, comments, patches, etc.? Contact Jason Woofenden