TYPE_COMMENT = peach_parser.TYPE_COMMENT
TYPE_DOCTYPE = peach_parser.TYPE_DOCTYPE
-get_el_offset = (el) ->
- rect = el.getBoundingClientRect()
+# 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
+get_el_bounds = (el) ->
+ if el.getBoundingClientRect
+ rect = el.getBoundingClientRect()
+ else
+ rect = get_text_bounding_rect el
doc = el.ownerDocument.documentElement
win = el.ownerDocument.defaultView
+ y_fix = win.pageYOffset - doc.clientTop
+ x_fix = win.pageXOffset - doc.clientLeft
return {
- top: rect.top + win.pageYOffset - doc.clientTop
- left: rect.left + win.pageXOffset - doc.clientLeft
+ x: rect.left + x_fix
+ y: rect.top + y_fix
+ w: rect.width ? (rect.right - rect.left)
+ h: rect.height ? (rect.top - rect.bottom)
}
-# 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"
+window.cursor_to_xyh = cursor_to_xyh = (n, i) ->
parent = n.el.parentNode
- if i is 0
- # cursor at start of text
- parent.insertBefore span, n.el
- ret = get_el_offset span
- span.parentNode.removeChild span
- return ret
- else if i is n.text.length
- # cursor at end of text
- parent.insertBefore span, n.el.nextSibling
- ret = get_el_offset span
- span.parentNode.removeChild span
- return ret
- # cursor in middle of text
- # split the text node
- t0 = n.el.ownerDocument.createTextNode n.text.substr 0, i
- t1 = n.el.ownerDocument.createTextNode n.text.substr i
- parent.insertBefore t0, n.el
- parent.insertBefore span, n.el
- parent.insertBefore t1, n.el
- parent.removeChild n.el
- ret = get_el_offset span
- parent.insertBefore n.el, t0
- parent.removeChild t0
- parent.removeChild span
- parent.removeChild t1
+ els = []
+ txts = []
+ plus_width = false
+ if n.text.length < 2
+ bounds = get_el_offset n.el
+ if i is 1
+ plus_width = true
+ 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 = x: bounds.x, y: bounds.y, h: bounds.h
+ if plus_width
+ ret.x += bounds.w
+ # fudge case where bounds are BS because we're on non-significant whitespace
+ if i > 0
+ first = cursor_to_xyh n, 0
+ if ret.x <= first.x and ret.y is first.y
+ # no need for a loop here, because recursion
+ ret = cursor_to_xyh n, i - 1
return ret
-# TODO
-#loc_to_cursor = (n, i) ->
-# return top: , left:
-
# encode text so it can be safely placed inside an html attribute
enc_attr_regex = new RegExp '(&)|(")|(\u00A0)', 'g'
enc_attr = (txt) ->
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 = (top, n, i) ->
+find_next_cursor_position = (tree, n, i) ->
if n? and n.type is TYPE_TEXT and n.text.length > i
return [n, i + 1]
- found = traverse_tree top, before: n?, (node, state) ->
+ found = traverse_tree tree, before: n?, (node, state) ->
if node.type is TYPE_TEXT and state.before is false
state.node = node
state.done = true
return null
# TODO make it so cursor can go places that don't have text but could
-find_prev_cursor_position = (top, n, i) ->
+find_prev_cursor_position = (tree, n, i) ->
if n? and n.type is TYPE_TEXT and i > 0
return [n, i - 1]
- found = traverse_tree top, before: n?, (node, state) ->
+ found = traverse_tree tree, before: n?, (node, state) ->
if node.type is TYPE_TEXT
unless n?
state.node = node
return [found.node, found.node.text.length]
return null
+find_loc_cursor_position = (tree, loc) ->
+ for c in tree
+ if c.type is TYPE_TAG or c.type is TYPE_TEXT
+ bounds = get_el_bounds c.el
+ 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
+ ret = find_loc_cursor_position c.children, loc
+ 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
+ after_i = c.text.length
+ after = cursor_to_xyh c, after_i
+ if loc.y < before.y + before.h and loc.x < before.x
+ continue # before first char on first line
+ if loc.y > after.y and loc.x > after.x
+ continue # after last char on last line
+ 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
+ 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
+
class PeachHTML5Editor
constructor: (in_el, options = {}) ->
@in_el = in_el
'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
+ if new_cursor?
+ @move_cursor new_cursor
@idoc.body.onkeyup = (e) =>
return if e.ctrlKey
return false if ignore_key_codes[e.keyCode]?
@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
+ loc = cursor_to_xyh cursor[0], cursor[1]
+ @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