str_has_ws_run = (str) ->
return multi_sp_regex.test str
-debug_dot_at = (doc, x, y) ->
- return # disabled
- 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 = window.bounds = (el) ->
n.parent.children.splice i, 1
break
-# 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
-
- tree_remove_empty_text_nodes(tree)
-
- iterate = (tree, cb) ->
- for n in tree
- if n.type is '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 '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 = (undo) ->
- if undo
- 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 -1
- else
- 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 1
- replace_with_space = (undo) ->
- if undo
- cur.text = (cur.text.substr 0, cur_i) + removed_char + (cur.text.substr cur_i + 1)
- cur.el.textContent = cur.text
- else
- removed_char = cur.text.charAt(cur_i)
- if removed_char isnt ' '
- cur.text = (cur.text.substr 0, cur_i) + ' ' + (cur.text.substr cur_i + 1)
- cur.el.textContent = cur.text
- return 0
- # 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
- fixers = [remove, replace_with_space]
- # check for common case: single whitespace surrounded by non-whitespace chars
- if prev? and next?
- unless (is_space_code prev.text.charCodeAt prev_i) or (is_space_code next.text.charCodeAt next_i)
- dbg = cur.text.charCodeAt cur_i
- if cur.text.charAt(cur_i) is ' ' # perens required
- # single space can't collapse, doesn't need fixin'
- return false
- else
- # tab, newline, etc, can't collapse, but maybe should be replaced
- fixers = [replace_with_space]
- 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
- # has bounds, don't try removing
- fixers = [replace_with_space]
- # 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.
- #
- # this block (try changing it, put it back if something moves) is also
- # used on collapsable whitespace characters besides space. In this case
- # the character is replaced with a normal space character instead of
- # removed
- if prev? and not prev_px?
- prev_px = new_cursor_position n: prev, i: prev_i
- if next? and not next_px?
- next_px = new_cursor_position n: next, i: next_i
- #if prev is null and next is null
- # parent_px = cur.parent.el.getBoundingClientRect()
- undo_arg = true # just for readabality
- removed = 0
- for fixer in fixers
- break if removed > 0
- removed += fixer()
- need_undo = false
- if prev?
- if prev_px?
- new_prev_px = new_cursor_position n: prev, i: prev_i
- if new_prev_px?
- if new_prev_px.x isnt prev_px.x or new_prev_px.y isnt prev_px.y
- need_undo = true
- else
- need_undo = true
- else
- console.log "this shouldn't happen, we remove spaces that don't locate"
- if next? and not need_undo
- if next_px?
- new_next_px = new_cursor_position n: next, i: next_i
- if new_next_px?
- if new_next_px.x isnt next_px.x or new_next_px.y isnt next_px.y
- need_undo = true
- else
- need_undo = true
- #else
- # console.log "removing space becase space after it is collapsed"
- if need_undo
- removed += fixer undo_arg
- if removed > 0
- return true
- else
- return false
- # 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
-
- tree_remove_empty_text_nodes(tree)
-
class PeachHTML5Editor
# Options: (all optional)
# editor_id: "id" attribute for outer-most element created by/for editor
return false
when KEY_DELETE
return false unless @cursor?
- return false unless @cursor.i < @cursor.n.text.length
- @remove_character @cursor.n, @cursor.i
- @text_cleanup @cursor.n
- @changed()
- new_cursor = new_cursor_position n: @cursor.n, i: @cursor.i
+ new_cursor = find_next_cursor_position @tree, n: @cursor.n, i: @cursor.i
+ # try moving cursor right and then running backspace code
+ # TODO replace this hack with a real implementation
if new_cursor?
- @move_cursor new_cursor
- else
- @kill_cursor()
+ # try to detect common case where cursor goes inside an block,
+ # but doesn't pass a character (and advance one more in that case)
+ if new_cursor.n isnt @cursor.n and new_cursor.i is 0
+ if new_cursor.n.type is 'text' and new_cursor.n.text.length > 0
+ if new_cursor.n.parent?
+ unless @is_display_block new_cursor.n.parent
+ # FIXME should test run sibling
+ new_cursor = new_cursor_position n: new_cursor.n, i: new_cursor.i + 1
+ if new_cursor?
+ if new_cursor.n isnt @cursor.n or new_cursor.i isnt @cursor.i
+ @move_cursor new_cursor
+ @on_key_backspace e
return false
when KEY_ENTER
@on_key_enter e
ret.push n
return false # not done traversing
return ret
- _merge_left: (state) -> # helper for on_key_backspace
+ node_is_decendant: (young, old) ->
+ while young? and young != @tree_parent
+ return true if young is old
+ young = young.parent
+ return false
+ # helper for on_key_backspace
+ _merge_left: (state) ->
# the node prev to n was not prev to it a moment ago, merge with it if reasonable
pi = state.n.parent.children.indexOf(state.n)
if pi > 0
@remove_node state.n
state.n = prev
state.changed = true
+ state.moved_cursor = true
# else # TODO merge possible consecutive matching inline tags at @cursor
return state
- _remove_node_and_inline_parents: (n) -> # helper for on_key_backspace
+ # helper for on_key_backspace
+ # remove n from the dom, also remove its inline parents that are emptied by removing n
+ _backspace_node_helper: (n, run = @get_text_run(n), run_i = run.indexOf(n)) ->
block = @find_block_parent n
# delete text node
@remove_node n
# delete any inline parents
n = n.parent
while n? and n isnt block
+ # bail if the previous node in this run is also inside the same parent
+ if run_i > 0
+ break if @node_is_decendant run[run_i - 1], n
+ # bail if the next node in this run is also inside the same parent
+ if run_i + 1 < run.length
+ break if @node_is_decendant run[run_i + 1], n
+ # move any sibling nodes to parent. These nodes are not in the text run
while n.children.length > 0
@move_node n.children[0], n.parent, n
+ # remove (now completely empty) inline parent
@remove_node n
+ # proceed to outer parent
n = n.parent
return
on_key_backspace: (e) ->
prev = run[run_i - 1]
if prev.type is 'text' # if previous in text run is text
if prev.text.length is 1 # if emptying prev (in text run)
- @_remove_node_and_inline_parents prev
+ @_backspace_node_helper prev, run, run_i
merge_state = n: @cursor.n, i: @cursor.i
@_merge_left merge_state
@text_cleanup merge_state.n
@text_cleanup @cursor.n
new_cursor = new_cursor_position n: @cursor.n, i: @cursor.i
else if prev.name is 'br' or prev.name is 'hr'
- @_remove_node_and_inline_parents prev
+ @_backspace_node_helper prev, run, run_i
merge_state = n: @cursor.n, i: @cursor.i
@_merge_left merge_state
@text_cleanup merge_state.n
new_cursor = new_cursor_position n: merge_state.n, i: merge_state.i
- # FIXME CONTINUE
+ # FIXME implement this:
# else # if prev (in run) is inline-block
# if that inline-block has text in it
# delete last char in prev inlineblock
block = @find_block_parent @cursor.n
changed = false
n = @cursor.n.parent
+ # note: this doesn't use _backspace_node_helper because:
+ # 1. we don't want to delete the target node (we're replacing it's contents)
+ # 2. we want to track whether anything was removed
+ # 3. we know already know there's no other text from this run anywhere
while n and n isnt block
changed = true
while n.children.length > 0
ncb = @find_block_parent new_cursor.n
if ncb isnt block
new_cursor = find_next_cursor_position @tree, n: @cursor.n, i: 1
- # delete text node
- @remove_node @cursor.n
- # delete any inline parents
- n = @cursor.n.parent
- while n? and n isnt block
- # FIXME break if anything else in the text run is in here too
- while n.children.length > 0
- @move_node n.children[0], n.parent, n
- @remove_node n
- n = n.parent
- # update cursor dest in case things moved around
+ # delete text node and cleanup emptied parents
+ run_i = run.indexOf @cursor.n
+ @_backspace_node_helper @cursor.n, run, run_i
+ # see if new adjacent siblings should merge
+ # TODO make smarter
+ if run_i > 0 and run_i + 1 < run.length
+ if run[run_i - 1].type is 'text' and run[run_i + 1].type is 'text'
+ merge_state = n: run[run_i + 1]
+ @_merge_left merge_state
+ if merge_state.moved_cursor
+ new_cursor = merge_state
+ # update whitespace preservation
+ @text_cleanup(block)
+ # update cursor x/y in case things moved around
if new_cursor?
- new_cursor = new_cursor_position n: new_cursor.n, i: new_cursor.i
+ if new_cursor.n.el.parentNode # still in dom after cleanup
+ new_cursor = new_cursor_position n: new_cursor.n, i: new_cursor.i
+ else
+ new_cursor = null
else # there's a char left of cursor that we can delete without emptying anything
# delete character
need_text_cleanup = true
@tree_parent.el = @idoc.body
@clear_dom()
instantiate_tree @tree, @tree_parent.el
- tree_dedup_space @tree
+ @collapse_whitespace @tree
@changed()
changed: ->
@in_el.onchange = null
h = parseInt(@idoc.body.scrollHeight, 10)
@iframe.style.height = "#{h}px"
@wrap2.scrollTop = s
- # does this node have whitespace that would be collapsed by white-space: normal?
- # note: this checks direct text children, and does _not_ recurse into child tags
- # tag is a node with type:"tag"
- # FIXME use new textrun api
- has_collapsable_space: (tag) ->
- for n in tag.children
- if n.type is 'text'
- for i in [0...n.text.length]
- code = n.text.charCodeAt i
- if code isnt 32 and is_space_code code
- # tab, return
- return true
- # check for double spaces that don't surround insert location
- continue if i is 0
- if n.text.substr(i - 1, 2) is ' '
- return true
- if n.text.length > 0
- if is_space_code n.text.charCodeAt 0
- return true
- if is_space_code n.text.charCodeAt n.text.length - 1
- return true
- return false
# true if n is text node with only one caracter, and the only child of a tag
is_only_char_in_tag: (n, i) ->
return false unless n.type is 'text'
else
if n.attrs.style?
delete n.attrs.style
+ # remove whitespace that would be trimmed
+ # replace whitespace that would collapse with a single space
+ # FIXME remove whitespace from after <br> (but not before)
+ collapse_whitespace: (tree = @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
+
+ tree_remove_empty_text_nodes(tree)
+
+ iterate = (tree, cb) ->
+ for n in tree
+ if n.type is '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 '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 = (undo) ->
+ if undo
+ 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 -1
+ else
+ 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 1
+ replace_with_space = (undo) ->
+ if undo
+ cur.text = (cur.text.substr 0, cur_i) + removed_char + (cur.text.substr cur_i + 1)
+ cur.el.textContent = cur.text
+ else
+ removed_char = cur.text.charAt(cur_i)
+ if removed_char isnt ' '
+ cur.text = (cur.text.substr 0, cur_i) + ' ' + (cur.text.substr cur_i + 1)
+ cur.el.textContent = cur.text
+ return 0
+ # 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
+ fixers = [remove, replace_with_space]
+ # check for common case: single whitespace surrounded by non-whitespace chars
+ if prev? and next?
+ unless (is_space_code prev.text.charCodeAt prev_i) or (is_space_code next.text.charCodeAt next_i)
+ dbg = cur.text.charCodeAt cur_i
+ if cur.text.charAt(cur_i) is ' ' # perens required
+ # single space can't collapse, doesn't need fixin'
+ return false
+ else
+ # tab, newline, etc, can't collapse, but maybe should be replaced
+ fixers = [replace_with_space]
+ 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
+ # has bounds, don't try removing
+ fixers = [replace_with_space]
+ # 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.
+ #
+ # this block (try changing it, put it back if something moves) is also
+ # used on collapsable whitespace characters besides space. In this case
+ # the character is replaced with a normal space character instead of
+ # removed
+ if prev? and not prev_px?
+ prev_px = new_cursor_position n: prev, i: prev_i
+ if next? and not next_px?
+ next_px = new_cursor_position n: next, i: next_i
+ #if prev is null and next is null
+ # parent_px = cur.parent.el.getBoundingClientRect()
+ undo_arg = true # just for readabality
+ removed = 0
+ for fixer in fixers
+ break if removed > 0
+ removed += fixer()
+ need_undo = false
+ if prev?
+ if prev_px?
+ new_prev_px = new_cursor_position n: prev, i: prev_i
+ if new_prev_px?
+ if new_prev_px.x isnt prev_px.x or new_prev_px.y isnt prev_px.y
+ need_undo = true
+ else
+ need_undo = true
+ else
+ console.log "this shouldn't happen, we remove spaces that don't locate"
+ if next? and not need_undo
+ if next_px?
+ new_next_px = new_cursor_position n: next, i: next_i
+ if new_next_px?
+ if new_next_px.x isnt next_px.x or new_next_px.y isnt next_px.y
+ need_undo = true
+ else
+ need_undo = true
+ #else
+ # console.log "removing space becase space after it is collapsed"
+ if need_undo
+ removed += fixer undo_arg
+ if removed > 0
+ return true
+ else
+ return false
+ # 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
+
+ tree_remove_empty_text_nodes(tree)
+ return
# call this after you insert or remove inline nodes. It will:
# merge consecutive text nodes
# remove empty text nodes
# adjust white-space property
+ # note: this assumes that all whitespace in text nodes should be displayed
+ # (ie not collapse or be trimmed) and will change the white-space property
+ # as needed to achieve this.
text_cleanup: (n) ->
if @is_display_block n
block = n
Got questions, comments, patches, etc.? Contact Jason Woofenden