TYPE_COMMENT = peach_parser.TYPE_COMMENT
TYPE_DOCTYPE = peach_parser.TYPE_DOCTYPE
-# text nodes don't have getBoundingClientRect(), so wrap it in a span, measure
-# and then put it back
-get_text_bounding_rect = (el) ->
- span = el.ownerDocument.createElement 'span'
- el.parentNode.replaceChild span, el
- span.appendChild el
- ret = span.getBoundingClientRect()
- span.parentNode.replaceChild el, span
- return ret
+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) ->
- if el.getBoundingClientRect
+ if el.getBoundingClientRect?
rect = el.getBoundingClientRect()
else
- rect = get_text_bounding_rect el
+ # 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
+ 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)
+ }
+
+# 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
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 top/left coordinates of where the cursor should be if it's at
+# 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
# encode text so it can be safely placed inside an html attribute
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 = (tree, n, i) ->
if n? and n.type is TYPE_TEXT and n.text.length > i
- return [n, i + 1]
+ 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
# TODO make it so cursor can go places that don't have text but could
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 tree, before: n?, (node, state) ->
if node.type is TYPE_TEXT
return null
find_loc_cursor_position = (tree, loc) ->
- console.log tree, loc
for c in tree
if c.type is TYPE_TAG or c.type is TYPE_TEXT
bounds = get_el_bounds c.el
- console.log bounds
- continue if loc.left < bounds.x
- continue if loc.left > bounds.x + bounds.w
- continue if loc.top < bounds.y
- continue if loc.top > bounds.y + bounds.h
- if c.type is TYPE_TEXT
- # click is within bounding box that contains all text.
- return [c, 0] if c.text.length is 0
- #if c.text.length is 1
- # definitely no linebreak in it
- #if loc
- #
- # for inline elements, this can include text in other tags on
- # the first or last lines.
- #
- # they clicked on text. now determine where in the text
- tries = {}
- cur = Math.floor(c.text.length / 2)
- #loop
- # xy = tries[cur] = cursor_to_loc c, cur
- return [c, cur]
+ 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
- console.log "in"
ret = find_loc_cursor_position c.children, loc
- console.log 'found', ret if ret?
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
+
+# 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
@idoc.body.onclick = (e) =>
# idoc.body.offset().left/top
- new_cursor = find_loc_cursor_position @tree, left: e.pageX, top: e.pageY
+ new_cursor = find_loc_cursor_position @tree, x: e.pageX, y: e.pageY
if new_cursor?
@move_cursor new_cursor
@idoc.body.onkeyup = (e) =>
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
+ 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) ->
- 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