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
els = []
txts = []
parent.insertBefore n.el, els[0]
for el in els
parent.removeChild el
- ret = top: bounds.y, left: bounds.x
+ ret = x: bounds.x, y: bounds.y, h: bounds.h
if plus_width
- ret.left += bounds.w
+ ret.x += 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
+ 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_loc n, i - 1
+ ret = cursor_to_xyh n, i - 1
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 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
+ 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
@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
@clear_dom()
instantiate_tree @tree, @idoc.body
move_cursor: (cursor) ->
- return if @cursor? and cursor? and @cursor[0] is cursor[0] and @cursor[1] is cursor[1]
@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
+ 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