# text nodes don't have getBoundingClientRect(), so use selection api to find
# it.
-get_text_bounding_rect = (el) ->
get_el_bounds = (el) ->
if el.getBoundingClientRect?
rect = el.getBoundingClientRect()
h: rect.height ? (rect.top - rect.bottom)
}
-# figure out the x/y coordinates of where the cursor should be if it's at
-# position ``i`` within text node ``n``
-window.cursor_to_xyh = cursor_to_xyh = (n, i) ->
+# 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()
- plus_width = false
- if n.text.length is 0
- range.setStart n.el, i
- range.setEnd n.el, i
- if i is n.text.length
- range.setStart n.el, i - 1
- range.setEnd n.el, i
- plus_width = true
- else
- range.setStart n.el, i
- range.setEnd n.el, i + 1
- # chromium returns bogus results with getBoundingClientRect() when zero width and/or height
- rect = range.getClientRects()
- if rect.length > 0
- if plus_width
- # chromium returns multiple rects for the space that is broken
- # across lines by word-wrap (firefox doesn't)
- rect = rect[rect.length - 1]
- else
- rect = rect[0]
+ range.setStart el, start
+ range.setEnd el, end
+ rects = range.getClientRects()
+ if rects.length > 0
+ rect = rects[0]
else
- return x: 0, y: 0, w: 0, h: 0 # TODO return null, fix callers
- doc = n.el.ownerDocument.documentElement
- win = n.el.ownerDocument.defaultView
+ return null
+ doc = el.ownerDocument.documentElement
+ win = el.ownerDocument.defaultView
y_fix = win.pageYOffset - doc.clientTop
x_fix = win.pageXOffset - doc.clientLeft
- ret = {
+ 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()
}
- if plus_width
- ret.x += ret.w
- debug_dot_at n.el.ownerDocument, ret.x, ret.y
+
+# 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
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.x > orig_xyh.x or next_xyh.y > orig_xyh.y
- return [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
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.x < orig_xyh.x or prev_xyh.y < orig_xyh.y
- return [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
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
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
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
@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
+ 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]
- return if loc is null
+ 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
Got questions, comments, patches, etc.? Contact Jason Woofenden