# Copyright 2015 Jason Woofenden
# This file implements an WYSIWYG editor in the browser (no contenteditable)
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see .
# SETTINGS
overlay_padding = 10
timeout = (ms, cb) -> return setTimeout cb, ms
next_frame = (cb) ->
if (window.requestAnimationFrame?)
window.requestAnimationFrame cb
else
timeout 16, cb
this_url_sans_path = ->
ret = "#{window.location.href}"
clip = ret.lastIndexOf '#'
if clip > -1
ret = ret.substr 0, clip
clip = ret.lastIndexOf '?'
if clip > -1
ret = ret.substr 0, clip
clip = ret.lastIndexOf '/'
if clip > -1
ret = ret.substr 0, clip + 1
return ret
# xml 1.0 spec, chromium and firefox accept these, plus lots of unicode chars
valid_attr_regex = new RegExp '^[a-zA-Z_:][-a-zA-Z0-9_:.]*$'
# html5 spec is much more lax, but chromium won't let me make at attribute with the name "4"
js_attr_regex = new RegExp '^[oO][nN].'
debug_dot_at = (doc, x, y) ->
return # disabled
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 = window.bounds = (el) ->
if el.getBoundingClientRect?
rect = el.getBoundingClientRect()
else
# 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)
}
is_display_block = (el) ->
if el.currentStyle?
return el.currentStyle.display is 'block'
else
return window.getComputedStyle(el, null).getPropertyValue('display') is 'block'
# Pass return value from dom event handlers to this.
# If they return false, this will addinionally stop propagation and default.
event_return = (e, bool) ->
if bool is false
if e.stopPropagation?
e.stopPropagation()
if e.preventDefault?
e.preventDefault()
return bool
# 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
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)
rects: rects
bounding: range.getBoundingClientRect()
}
class CursorPosition
constructor: (args) ->
@n = args.n ? null
@i = args.i ? null
if args.x?
@x = args.x
@y = args.y
@h = args.h
else
@set_xyh()
return
set_xyh: ->
range = document.createRange()
if @n.text.length is 0
ret = text_range_bounds @n.el, 0, 0
else 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?
@x = ret.x
@y = ret.y
@h = ret.h
else
@x = null
@y = null
@h = null
return ret
new_cursor_position = (args) ->
ret = new CursorPosition args
if ret.x?
return ret
return null
# encode text so it can be safely placed inside an html attribute
enc_attr_regex = new RegExp '(&)|(")|(\u00A0)', 'g'
enc_attr = (txt) ->
return txt.replace enc_attr_regex, (match, amp, quote) ->
return '&' if (amp)
return '"' if (quote)
return ' '
enc_text_regex = new RegExp '(&)|(<)|(\u00A0)', 'g'
enc_text = (txt) ->
return txt.replace enc_text_regex, (match, amp, lt) ->
return '&' if (amp)
return '<' if (lt)
return ' '
void_elements = {
area: true
base: true
br: true
col: true
embed: true
hr: true
img: true
input: true
keygen: true
link: true
meta: true
param: true
source: true
track: true
wbr: true
}
# TODO make these always pretty-print (on the inside) like blocks
no_text_elements = { # these elements never contain text
select: true
table: true
tr: true
thead: true
tbody: true
ul: true
ol: true
}
domify = (doc, hash) ->
for tag, attrs of hash
if tag is 'text'
return document.createTextNode attrs
el = document.createElement tag
for k, v of attrs
if k is 'children'
for child in v
el.appendChild child
else
el.setAttribute k, v
return el
outer_css = (args) ->
w = args.w ? 300
h = args.h ? 300
inner_padding = args.inner_padding ? overlay_padding
frame_width = args.frame_width ? inner_padding
# TODO editor controls height...
occupy = (left, top = left, right = left, bottom = top) ->
w -= left + right
h -= top + bottom
return Math.max(left, top, right, bottom)
ret = ''
ret += 'body {'
ret += 'margin: 0;'
ret += 'padding: 0;'
ret += 'color: black;'
ret += 'background: white;'
ret += '}'
ret += '#wrap1 {'
ret += "border: #{occupy 1}px solid black;"
ret += "padding: #{occupy frame_width}px;"
ret += '}'
ret += '#wrap2 {'
ret += "border: #{occupy 1}px solid black;"
ret += "padding: #{occupy inner_padding}px;"
ret += "padding-right: #{inner_padding + occupy 0, 0, 15, 0}px;" # for scroll bar
ret += "width: #{w}px;"
ret += "height: #{h}px;"
ret += 'overflow-x: hidden;'
ret += 'overflow-y: scroll;'
ret += '}'
ret += '#wrap3 {'
ret += 'position: relative;'
ret += "width: #{w}px;"
ret += "min-height: #{h}px;"
ret += '}'
ret += 'iframe {'
ret += 'box-sizing: border-box;'
ret += 'margin: 0;'
ret += 'border: none;'
ret += 'padding: 0;'
ret += "width: #{w}px;"
#ret += "height: #{h}px;" # height auto-set when content set/changed
ret += '-ms-user-select: none;'
ret += '-webkit-user-select: none;'
ret += '-moz-user-select: none;'
ret += 'user-select: none;'
ret += '}'
ret += '#overlay {'
ret += 'position: absolute;'
ret += "left: -#{inner_padding}px;"
ret += "top: -#{inner_padding}px;"
ret += "right: -#{inner_padding}px;"
ret += "bottom: -#{inner_padding}px;"
ret += 'overflow: hidden;'
ret += '}'
ret += '.lightbox {'
ret += 'position: absolute;'
ret += 'background: rgba(100,100,100,0.2);'
ret += '}'
ret += '#cursor {'
ret += 'position: absolute;'
ret += 'width: 2px;'
ret += 'background: linear-gradient(0deg, rgba(0,0,0,1), rgba(255,255,255,1), rgba(0,0,0,1), rgba(255,255,255,1), rgba(0,0,0,1), rgba(255,255,255,1), rgba(0,0,0,1), rgba(255,255,255,1), rgba(0,0,0,1));'
ret += 'background-size: 200% 200%;'
ret += '-webkit-animation: blink 1s linear normal infinite;'
ret += 'animation: blink 1s linear normal infinite;'
ret += '}'
ret += '@-webkit-keyframes blink {'
ret += '0%{background-position:0% 0%}'
ret += '100%{background-position:0% -100%}'
ret += '}'
ret += '@keyframes blink { '
ret += '0%{background-position:0% 0%}'
ret += '100%{background-position:0% -100%}'
ret += '}'
ret += '.ann_box {'
ret += 'z-index: 5;'
ret += 'position: absolute;'
ret += 'border: 1px solid rgba(0,0,0,0.1);'
ret += 'outline: 1px solid rgba(255,255,255,0.1);' # in case there's a black background
ret += '}'
ret += '.ann_tag {'
ret += 'z-index: 10;'
ret += 'position: absolute;'
ret += 'font-size: 8px;'
ret += 'white-space: pre;'
ret += 'background: rgba(255,255,255,0.4);'
ret += '-ms-user-select: none;'
ret += '-webkit-user-select: none;'
ret += '-moz-user-select: none;'
ret += 'user-select: none;'
ret += '}'
return ret
ignore_key_codes =
'18': true # alt
'20': true # capslock
'17': true # ctrl
'144': true # numlock
'16': true # shift
'91': true # windows "start" key
# key codes: (valid on keydown, not keypress)
KEY_LEFT = 37
KEY_UP = 38
KEY_RIGHT = 39
KEY_DOWN = 40
KEY_BACKSPACE = 8 # <--
KEY_DELETE = 46 # -->
KEY_END = 35
KEY_ENTER = 13
KEY_ESCAPE = 27
KEY_HOME = 36
KEY_INSERT = 45
KEY_PAGE_UP = 33
KEY_PAGE_DOWN = 34
KEY_TAB = 9
control_key_codes = # we react to these, but they aren't typing
'37': KEY_LEFT
'38': KEY_UP
'39': KEY_RIGHT
'40': KEY_DOWN
'35': KEY_END
'8': KEY_BACKSPACE
'46': KEY_DELETE
'13': KEY_ENTER
'27': KEY_ESCAPE
'36': KEY_HOME
'45': KEY_INSERT
'33': KEY_PAGE_UP
'34': KEY_PAGE_DOWN
'9': KEY_TAB
instantiate_tree = (tree, parent) ->
remove = []
for c, i in tree
switch c.type
when 'text'
c.el = parent.ownerDocument.createTextNode c.text
parent.appendChild c.el
when 'tag'
if c.name in ['script', 'object', 'iframe', 'link']
# TODO put placeholders instead
remove.unshift i
continue
# TODO create in correct namespace
c.el = parent.ownerDocument.createElement c.name
for k, v of c.attrs
# FIXME if attr_whitelist[k]?
if valid_attr_regex.test k
unless js_attr_regex.test k
c.el.setAttribute k, v
parent.appendChild c.el
if c.children.length
instantiate_tree c.children, c.el
for i in remove
tree.splice i, 1
traverse_tree = (tree, cb) ->
done = false
for c in tree
done = cb c
return done if done
if c.children.length
done = traverse_tree c.children, cb
return done if done
return done
first_cursor_position = (tree) ->
found = null
traverse_tree tree, (node, state) ->
if node.type is 'text'
cursor = new_cursor_position n: node, i: 0
if cursor?
found = cursor
return true
return false
return found # maybe null
# this will fail when text has non-locatable cursor positions
find_next_cursor_position = (tree, cursor) ->
if cursor.n.type is 'text' and cursor.n.text.length > cursor.i
new_cursor = new_cursor_position n: cursor.n, i: cursor.i + 1
if new_cursor?
return new_cursor
state_before = true
found = null
traverse_tree tree, (node, state) ->
if node.type is 'text' and state_before is false
new_cursor = new_cursor_position n: node, i: 0
if new_cursor?
found = new_cursor
return true
if node is cursor.n
state_before = false
return false
if found?
return found
return null
last_cursor_position = (tree) ->
found = null
traverse_tree tree, (node) ->
if node.type is 'text'
cursor = new_cursor_position n: node, i: node.text.length
if cursor?
found = cursor
return false
return found # maybe null
# this will fail when text has non-locatable cursor positions
find_prev_cursor_position = (tree, cursor) ->
if cursor.n.type is 'text' and cursor.i > 0
new_cursor = new_cursor_position n: cursor.n, i: cursor.i - 1
if new_cursor?
return new_cursor
found_prev = null
found = null
traverse_tree tree, (node) ->
if node is cursor.n
found = found_prev # maybe null
return true
if node.type is 'text'
new_cursor = new_cursor_position n: node, i: node.text.length
if new_cursor?
found_prev = new_cursor
return false
return found # maybe null
xy_to_cursor = (tree, xy) ->
for n in tree
if n.type is 'tag' or n.type is 'text'
bounds = get_el_bounds n.el
continue if xy.x < bounds.x
continue if xy.x > bounds.x + bounds.w
continue if xy.y < bounds.y
continue if xy.y > bounds.y + bounds.h
if n.children.length
ret = xy_to_cursor n.children, xy
return ret if ret?
if n.type is 'text'
# click is within bounding box that contains all text.
if n.text.length is 0
ret = new_cursor_position n: n, i: 0
return ret if ret?
continue
before = new_cursor_position n: n, i: 0
continue unless before?
after = new_cursor_position n: n, i: n.text.length
continue unless after?
if xy.y < before.y + before.h and xy.x < before.x
# console.log 'before first char on first line'
continue
if xy.y > after.y and xy.x > after.x
# console.log 'after last char on last line'
continue
if xy.y < before.y
console.log "Warning: click in text bounding box but above first line"
continue # above first line (runaround?)
if xy.y > after.y + after.h
console.log "Warning: click in text bounding box but below last line", xy.y, after.y, after.h
continue # below last line (shouldn't happen?)
while after.i - before.i > 1
guess_i = Math.round((before.i + after.i) / 2)
cur = new_cursor_position n: n, i: guess_i
unless cur?
console.log "error: failed to find cursor pixel location for", n, guess_i
before = null
break
if xy.y < cur.y or (xy.y <= cur.y + cur.h and xy.x < cur.x)
after = cur
else
before = cur
continue unless before? # signals failure to find a cursor position
# which one is closest?
if Math.abs(before.x - xy.x) < Math.abs(after.x - xy.x)
return before
else
return after
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
tree_remove_empty_text_nodes = (tree) ->
empties = []
traverse_tree tree, (n) ->
if n.type is 'text'
if n.text.length is 0
empties.unshift n
return false
for n in empties
# don't completely empty the tree
if tree.length is 1
if tree[0].type is 'text'
console.log "oop, leaving a blank node because it's the only thing"
return
n.el.parentNode.removeChild n.el
for c, i in n.parent.children
if c is n
n.parent.children.splice i, 1
break
# pass a array of nodes (from parser library, ie it should have .el and .text)
tree_dedup_space = (tree) ->
prev = cur = next = null
prev_i = cur_i = next_i = 0
prev_pos = pos = next_pos = null
prev_px = cur_px = next_px = null
first = true
removed_char = null
tree_remove_empty_text_nodes(tree)
iterate = (tree, cb) ->
for n in tree
if n.type is 'text'
i = 0
while i < n.text.length # don't foreach, cb might remove chars
advance = cb n, i
if advance
i += 1
if n.type is 'tag'
block = is_display_block n.el
if block
cb null
if n.children.length > 0
iterate n.children, cb
if block
cb null
# remove cur char
remove = ->
removed_char = cur.text.charAt(cur_i)
cur.el.textContent = cur.text = (cur.text.substr 0, cur_i) + (cur.text.substr cur_i + 1)
if next is cur # in same text node
if next_i is 0
throw "how is this possible?"
next_i -= 1
return true
# undo remove()
put_it_back = ->
cur.el.textContent = cur.text = (cur.text.substr 0, cur_i) + removed_char + (cur.text.substr cur_i)
if next is cur # in same text node
next_i += 1
return false
# return true if cur was removed from the dom (ie re-use same prev)
operate = ->
# cur definitately set
# prev and/or next might be null, indicating the start/end of a display:block
return false unless is_space_code cur.text.charCodeAt cur_i
bounds = text_range_bounds cur.el, cur_i, cur_i + 1
# consistent cases:
# 1. zero rects returned by getClientRects() means collapsed space
if bounds is null
return remove()
# 2. width greater than zero means visible space
if bounds.w > 0
return false
# now the weird edge cases...
#
# firefox and chromium both report zero width for characters at the end
# of a line where the text wraps (automatically, due to word-wrap) to
# the next line. These do not appear to be distinguishable from
# collapsed spaces via the range/bounds api, so...
#
# remove it from the dom, and if prev or next moves, put it back.
if prev? and not prev_px?
prev_px = new_cursor_position n: prev, i: prev_i
if next? and not next_px?
next_px = new_cursor_position n: next, i: next_i
#if prev is null and next is null
# parent_px = cur.parent.el.getBoundingClientRect()
remove()
if prev?
if prev_px?
new_prev_px = new_cursor_position n: prev, i: prev_i
if new_prev_px.x isnt prev_px.x or new_prev_px.y isnt prev_px.y
return put_it_back()
else
console.log "this shouldn't happen, we remove spaces that don't locate"
if next?
if next_px?
new_next_px = new_cursor_position n: next, i: next_i
if new_next_px.x isnt next_px.x or new_next_px.y isnt next_px.y
return put_it_back()
#else
# console.log "removing space becase space after it is collapsed"
return true
# pass null at start/end of display:block
queue = (n, i) ->
next = n
next_i = i
next_px = null
advance = true
if cur?
removed = operate()
# don't advance (to the next character next time) if we removed a
# character from the same text node as ``next``, because doing so
# renumbers the indexes in that string
if removed and cur is next
advance = false
else
removed = false
unless removed
prev = cur
prev_i = cur_i
prev_px = cur_px
cur = next
cur_i = next_i
cur_px = next_px
return advance
queue null
iterate tree, queue
queue null
tree_remove_empty_text_nodes(tree)
class PeachHTML5Editor
# Options: (all optional)
# editor_id: "id" attribute for outer-most element created by/for editor
# css_file: filename of a css file to style editable content
# on_init: callback for when the editable content is in place
constructor: (in_el, options) ->
@options = options ? {}
@in_el = in_el
@tree = null
@matting = []
@init_1_called = false # when iframes have loaded
@outer_iframe # iframe to hold editor
@outer_idoc # "document" object for @outer_iframe
@wrap2 = null # scrollbar is on this
@iframe = null # iframe to hold editable content
@idoc = null # "document" object for @iframe
@cursor = null
@cursor_el = null
@cursor_visible = false
@poll_for_blur_timeout = null
@wrap2_offset = null
@iframe_height = null
opt_fragment = @options.fragment ? true
@parser_opts = {}
if opt_fragment
@parser_opts.fragment = 'body'
@outer_iframe = domify document, iframe: {}
outer_iframe_style = 'border: none !important; margin: 0 !important; padding: 0 !important; height: 100% !important; width: 100% !important;'
if @options.editor_id?
@outer_iframe.setAttribute 'id', @options.editor_id
@outer_iframe.onload = =>
@outer_idoc = @outer_iframe.contentDocument
icss = domify @outer_idoc, style: children: [
domify @outer_idoc, text: css
]
@outer_idoc.head.appendChild icss
@iframe = domify @outer_idoc, iframe: sandbox: 'allow-same-origin allow-scripts'
@iframe.onload = =>
@init_1()
timeout 200, => # firefox never fires this onload
@init_1() unless @init_1_called
@outer_idoc.body.appendChild(
domify @outer_idoc, div: id: 'wrap1', children: [
domify @outer_idoc, div: style: "position: absolute; top: 0; left: 1px; font-size: 10px", children: [ domify @outer_idoc, text: "Peach HTML5 Editor" ]
@wrap2 = domify @outer_idoc, div: id: 'wrap2', children: [
domify @outer_idoc, div: id: 'wrap3', children: [
@iframe
@overlay = domify @outer_idoc, div: id: 'overlay'
]
]
]
)
outer_wrap = domify document, div: class: 'peach_html5_editor'
@in_el.parentNode.appendChild outer_wrap
outer_bounds = get_el_bounds outer_wrap
if outer_bounds.w < 300
outer_bounds.w = 300
if outer_bounds.h < 300
outer_bounds.h = 300
outer_iframe_style += "width: #{outer_bounds.w}px; height: #{outer_bounds.h}px;"
@outer_iframe.setAttribute 'style', outer_iframe_style
css = outer_css w: outer_bounds.w, h: outer_bounds.h
outer_wrap.appendChild @outer_iframe
init_1: -> # @iframe has loaded (but not it's css)
@idoc = @iframe.contentDocument
@init_1_called = true
# chromium doesn't resolve relative urls as though they were at the same domain
# so add a tag
@idoc.head.appendChild domify @idoc, base: href: this_url_sans_path()
# don't let @iframe have scrollbars
@idoc.head.appendChild domify @idoc, style: children: [domify @idoc, text: "body { overflow: hidden; }"]
# load css file
if @options.css_file
istyle = domify @idoc, link: rel: 'stylesheet', href: @options.css_file
istyle.onload = =>
@init_2()
@idoc.head.appendChild istyle
else
@init_2()
init_2: -> # @iframe and it's css file(s) are ready
@overlay.onclick = (e) =>
@have_focus()
return event_return e, @onclick e
@overlay.ondoubleclick = (e) =>
@have_focus()
return event_return e, @ondoubleclick e
@outer_idoc.body.onkeyup = (e) =>
@have_focus()
return event_return e, @onkeyup e
@outer_idoc.body.onkeydown = (e) =>
@have_focus()
return event_return e, @onkeydown e
@outer_idoc.body.onkeypress = (e) =>
@have_focus()
return event_return e, @onkeypress e
@load_html @in_el.value
if @options.on_init?
@options.on_init()
overlay_event_to_inner_xy: (e) ->
unless @wrap2_offset?
@wrap2_offset = get_el_bounds @wrap2
x = e.pageX - overlay_padding
y = e.pageY - overlay_padding + @wrap2.scrollTop
return x: x - @wrap2_offset.x, y: y - @wrap2_offset.y
onclick: (e) ->
xy = @overlay_event_to_inner_xy e
new_cursor = xy_to_cursor @tree, xy
if new_cursor?
@move_cursor new_cursor
else
@kill_cursor()
return false
ondoubleclick: (e) ->
return false
onkeyup: (e) ->
return if e.ctrlKey
return false if ignore_key_codes[e.keyCode]?
#return false if control_key_codes[e.keyCode]?
onkeydown: (e) ->
return if e.ctrlKey
return false if ignore_key_codes[e.keyCode]?
#return false if control_key_codes[e.keyCode]?
switch e.keyCode
when KEY_LEFT
if @cursor?
new_cursor = find_prev_cursor_position @tree, @cursor
else
new_cursor = first_cursor_position @tree
if new_cursor?
@move_cursor new_cursor
return false
when KEY_RIGHT
if @cursor?
new_cursor = find_next_cursor_position @tree, @cursor
else
new_cursor = last_cursor_position @tree
if new_cursor?
@move_cursor new_cursor
return false
when KEY_UP
if @cursor?
new_cursor = @cursor
# go prev until we're higher on y axis
while new_cursor.y >= @cursor.y
new_cursor = find_prev_cursor_position @tree, new_cursor
return false unless new_cursor?
# done early if we're already left of old cursor position
if new_cursor.x <= @cursor.x
@move_cursor new_cursor
return false
target_y = new_cursor.y
# search leftward, until we find the closest position
# new_cursor is the prev-most position we've checked
# prev_cursor is the older value, so it's not as prev as new_cursor
while new_cursor.x > @cursor.x and new_cursor.y is target_y
prev_cursor = new_cursor
new_cursor = find_prev_cursor_position @tree, new_cursor
break unless new_cursor?
# move cursor to prev_cursor or new_cursor
if new_cursor?
if new_cursor.y is target_y
# both valid, and on the same line, use closest
if (@cursor.x - new_cursor.x) < (prev_cursor.x - @cursor.x)
@move_cursor new_cursor
else
@move_cursor prev_cursor
else
# new_cursor on wrong line, use prev_cursor
@move_cursor prev_cursor
else
# can't go any further prev, use prev_cursor
@move_cursor prev_cursor
else
# move cursor to first position in document
new_cursor = first_cursor_position @tree
if new_cursor?
@move_cursor new_cursor
return false
when KEY_DOWN
return false
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]
@changed()
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]]
@changed()
return false
when KEY_ENTER
return false
when KEY_ESCAPE
return false
when KEY_HOME
return false
when KEY_INSERT
return false
when KEY_PAGE_UP
return false
when KEY_PAGE_DOWN
return false
when KEY_TAB
return false
onkeypress: (e) ->
return if e.ctrlKey
return false if ignore_key_codes[e.keyCode]?
# return false if control_key_codes[e.keyCode]? # handled in keydown
char = e.charCode ? e.keyCode
if char and @cursor?
char = String.fromCharCode char
if @cursor[1] is 0
@cursor[0].text = char + @cursor[0].text
else if @cursor[1] is @cursor[0].text.length - 1
@cursor[0].text += char
else
@cursor[0].text =
@cursor[0].text.substr(0, @cursor[1]) +
char +
@cursor[0].text.substr(@cursor[1])
@cursor[0].el.nodeValue = @cursor[0].text
@move_cursor [@cursor[0], @cursor[1] + 1]
@changed()
return false
clear_dom: -> # remove all the editable content (and cursor, overlays, etc)
while @idoc.body.childNodes.length
@idoc.body.removeChild @idoc.body.childNodes[0]
@kill_cursor()
return
load_html: (html) ->
@tree = peach_parser.parse html, @parser_opts
@clear_dom()
instantiate_tree @tree, @idoc.body
tree_dedup_space @tree
@changed()
changed: ->
@in_el.onchange = null
@in_el.value = @pretty_html @tree
@in_el.onchange = =>
@load_html @in_el.value
@adjust_iframe_height()
adjust_iframe_height: ->
h = parseInt(@idoc.body.scrollHeight, 10)
if @iframe_height isnt h
@iframe_height = h
s = @wrap2.scrollTop
@iframe.style.height = "0"
@iframe.style.height = "#{h}px"
@wrap2.scrollTop = s
kill_cursor: -> # remove it, forget where it was
if @cursor_visible
@cursor_el.parentNode.removeChild @cursor_el
@cursor_visible = false
@cursor = null
@annotate null
move_cursor: (cursor) ->
@cursor = cursor
unless @cursor_visible
@cursor_el = domify @outer_idoc, div: id: 'cursor'
@overlay.appendChild @cursor_el
@cursor_visible = true
@cursor_el.style.left = "#{cursor.x + overlay_padding - 1}px"
if cursor.h < 5
height = 12
else
height = cursor.h
@cursor_el.style.top = "#{cursor.y + overlay_padding + Math.round(height * .07)}px"
@cursor_el.style.height = "#{Math.round height * 0.82}px"
@annotate cursor.n
annotate: (n) ->
while @matting.length > 0
@overlay.removeChild @matting[0]
@matting.shift()
return unless n?
prev_bounds = x: 0, y: 0, w: 0, h: 0
alpha = 0.1
while n?.el?
if n.type is 'text'
n = n.parent
continue
bounds = get_el_bounds n.el
return unless bounds?
if bounds.x is prev_bounds.x and bounds.y is prev_bounds.y and bounds.w is prev_bounds.w and bounds.h is prev_bounds.h
n = n.parent
continue
ann_box = domify @outer_idoc, div: class: 'ann_box', style: "left: #{bounds.x - 1 + overlay_padding}px; top: #{bounds.y - 2 + overlay_padding}px; width: #{bounds.w}px; height: #{bounds.h}px" # outline: 1000px solid rgba(0,153,255,#{alpha});
@overlay.appendChild ann_box
@matting.push ann_box
ann_tag = domify @outer_idoc, div: class: 'ann_tag', style: "left: #{bounds.x + 1 + overlay_padding}px; top: #{bounds.y - 7 + overlay_padding}px", children: [domify @outer_idoc, text: " #{n.name} "]
@overlay.appendChild ann_tag
@matting.push ann_tag
n = n.parent
alpha *= 1.5
pretty_html: (tree, indent = '', parent_flags = pre_ish: false, block: true, want_nl: false) ->
ret = ''
want_nl = parent_flags.want_nl
prev_in_flow_is_text = false
prev_in_flow_is_block = false
for n, i in tree
# figure out flags
inner_flags = want_nl: true
is_br = false
switch n.type
when 'tag'
if n.name is 'br'
is_br = true
is_text = false
if n.el.currentStyle?
cs = n.el.currentStyle
whitespace = cs['white-space']
display = cs['display']
position = cs['position']
float = cs['float']
visibility = cs['visibility']
else
cs = @iframe.contentWindow.getComputedStyle(n.el, null)
whitespace = cs.getPropertyValue 'white-space'
display = cs.getPropertyValue 'display'
position = cs.getPropertyValue 'position'
float = cs.getPropertyValue 'float'
visibility = cs.getPropertyValue 'visibility'
if n.name is 'textarea'
inner_flags.pre_ish = true
else
inner_flags.pre_ish = whitespace.substr(0, 3) is 'pre'
switch float
when 'left', 'right'
in_flow = false
else
switch position
when 'absolute', 'fixed'
in_flow = false
else
if 'display' is 'none'
in_flow = false
else
switch visibility
when 'hidden', 'collapse'
in_flow = false
else # visible
in_flow = true
switch display
when 'inline', 'none'
inner_flags.block = false
is_block = in_flow_block = false
when 'inline-black'
inner_flags.block = true
is_block = in_flow_block = false
else # block, table, etc
inner_flags.block = true
is_block = true
in_flow_block = in_flow
when 'text'
is_text = true
is_block = false
in_flow = true
in_flow_block = false
else # 'comment', 'doctype'
is_text = false
is_block = false
in_flow = false
in_flow_block = false
# print whitespace if we can
unless parent_flags.pre_ish
unless prev_in_flow_is_text and is_br
if (i is 0 and parent_flags.block) or in_flow_block or prev_in_flow_is_block
if want_nl
ret += "\n"
ret += indent
switch n.type
when 'tag'
ret += '<' + n.name
attr_keys = []
for k of n.attrs
attr_keys.unshift k
#attr_keys.sort()
for k in attr_keys
ret += " #{k}"
if n.attrs[k].length > 0
ret += "=\"#{enc_attr n.attrs[k]}\""
ret += '>'
unless void_elements[n.name]?
if inner_flags.block
next_indent = indent + ' '
else
next_indent = indent
if n.children.length
ret += @pretty_html n.children, next_indent, inner_flags
ret += ""
when 'text'
ret += enc_text n.text
when 'comment'
ret += "" # TODO encode?
when 'doctype'
ret += " 0
ret += " \"#{n.public_identifier}\""
if n.system_identifier? and n.system_identifier.length > 0
ret += " \"#{n.system_identifier}\""
ret += ">"
want_nl = true
if in_flow
prev_in_flow_is_text = is_text
prev_in_flow_is_block = is_block or (in_flow and is_br)
if tree.length
# output final newline if allowed
unless parent_flags.pre_ish
if prev_in_flow_is_block or parent_flags.block
ret += "\n#{indent.substr 4}"
return ret
onblur: ->
@kill_cursor()
have_focus: ->
@editor_is_focused = true
@poll_for_blur()
poll_for_blur: ->
return if @poll_for_blur_timeout? # already polling
@poll_for_blur_timeout = timeout 150, =>
next_frame => # pause polling when browser knows we're not active/visible/etc.
@poll_for_blur_timeout = null
if document.activeElement is @outer_iframe
@poll_for_blur()
else
@editor_is_focused = false
@onblur()
window.peach_html5_editor = (args...) ->
return new PeachHTML5Editor args...
# test in browser: peach_html5_editor(document.getElementsByTagName('textarea')[0])