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
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
Got questions, comments, patches, etc.? Contact Jason Woofenden