X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=editor.coffee;h=9b4ad4f5eae8490343cdbe21ad4b9fb6620aff31;hb=7e3ab4e397ff9d274d2aaa1ef467727f2107bccd;hp=defecba6f56c8635a98f4da7826a6edc7fbb456e;hpb=33e750fec2426e7ab0f7f02d2d1cf76a3bf7091b;p=peach-html5-editor.git
diff --git a/editor.coffee b/editor.coffee
index defecba..9b4ad4f 100644
--- a/editor.coffee
+++ b/editor.coffee
@@ -14,59 +14,120 @@
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see .
-TYPE_TAG = peach_parser.TYPE_TAG
-TYPE_TEXT = peach_parser.TYPE_TEXT
-TYPE_COMMENT = peach_parser.TYPE_COMMENT
-TYPE_DOCTYPE = peach_parser.TYPE_DOCTYPE
+# SETTINGS
+overlay_padding = 10
-get_el_offset = (el) ->
- rect = el.getBoundingClientRect()
+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 = (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 {
- 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
+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()
+ }
+
+# 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
- 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
+# 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
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
+ 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
-# 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) ->
@@ -74,6 +135,12 @@ enc_attr = (txt) ->
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
@@ -92,40 +159,19 @@ void_elements = {
track: true
wbr: true
}
-dom_to_html = (dom) ->
- ret = ''
- for el in dom
- switch el.type
- when TYPE_TAG
- ret += '<' + el.name
- attr_keys = []
- for k of el.attrs
- attr_keys.unshift k
- #attr_keys.sort()
- for k in attr_keys
- ret += " #{k}"
- if el.attrs[k].length > 0
- ret += "=\"#{enc_attr el.attrs[k]}\""
- ret += '>'
- unless void_elements[el.name]
- if el.children.length
- ret += dom_to_html el.children
- ret += "#{el.name}>"
- when TYPE_TEXT
- ret += el.text
- when TYPE_COMMENT
- ret += ""
- when TYPE_DOCTYPE
- ret += " 0
- ret += " \"#{el.public_identifier}\""
- if el.system_identifier? and el.system_identifier.length > 0
- ret += " \"#{el.system_identifier}\""
- ret += ">\n"
- return ret
+# 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 = (h) ->
- for tag, attrs of h
+domify = (doc, hash) ->
+ for tag, attrs of hash
if tag is 'text'
return document.createTextNode attrs
el = document.createElement tag
@@ -137,27 +183,109 @@ domify = (h) ->
el.setAttribute k, v
return el
-css = ''
-css += 'div#peach_html5_editor_cursor {'
-css += 'position: absolute;'
-css += 'height: 1em;'
-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 += '}'
-css += '@-webkit-keyframes "blink" {'
-css += 'from, to { background: #000; }'
-css += '50% { background: transparent; }'
-css += '}'
-css += '@keyframes "blink" {'
-css += 'from, to { background: #000; }'
-css += '50% { background: transparent; }'
-css += '}'
+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
-# key codes:
+
+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
@@ -172,215 +300,762 @@ 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) ->
- for c in tree
+ remove = []
+ for c, i in tree
switch c.type
- when TYPE_TEXT
+ when 'text'
c.el = parent.ownerDocument.createTextNode c.text
parent.appendChild c.el
- when TYPE_TAG
+ 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]?
- c.el.setAttribute k, v
+ 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, state, cb) ->
+traverse_tree = (tree, cb) ->
+ done = false
for c in tree
- cb c, state
- break if state.done?
+ done = cb c
+ return done if done
if c.children.length
- 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
-# TODO make it so cursor can go places that don't have text but could
-find_next_cursor_position = (top, 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) ->
- if node.type is TYPE_TEXT and state.before is false
- state.node = node
- state.done = true
+ done = traverse_tree c.children, cb
+ return done if done
+ return done
+
+find_next_cursor_position = (tree, n, i) ->
+ if n.type is '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?
+ if next_xyh.x > orig_xyh.x or next_xyh.y > orig_xyh.y
+ return [n, next_i]
+ state_before = true
+ found = null
+ traverse_tree tree, (node, state) ->
+ if node.type is 'text' and state_before is false
+ if cursor_to_xyh(node, 0)?
+ found = node
+ return true
if node is n
- state.before = false
- if found.node?
- return [found.node, 0]
+ state_before = false
+ return false
+ if found?
+ return [found, 0]
return null
-# TODO make it so cursor can go places that don't have text but could
-find_prev_cursor_position = (top, n, i) ->
- if n? and n.type is TYPE_TEXT and i > 0
+find_prev_cursor_position = (tree, n, i) ->
+ if n? and n.type is '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 top, before: n?, (node, state) ->
- if node.type is TYPE_TEXT
+ found_prev = null
+ found = null
+ traverse_tree tree, (node) ->
+ if node.type is 'text'
unless n?
- state.node = node
- state.done = true
+ found = node
+ return true
if node is n
- if state.prev?
- state.node = state.prev
- state.done = true
- if node
- state.prev = node
- if found.node?
- return [found.node, found.node.text.length]
+ found = found_prev # null if n is the first text node
+ return true
+ found_prev = node
+ return false
+ if found?
+ if cursor_to_xyh found, found.text.length # text visible?
+ return [found, found.text.length]
+ return find_prev_cursor_position tree, found, 0
return null
+find_loc_cursor_position = (tree, loc) ->
+ for c in tree
+ if c.type is 'tag' or c.type is '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 '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
+
+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 = cursor_to_xyh prev, prev_i
+ if next? and not next_px?
+ next_px = cursor_to_xyh next, 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 = cursor_to_xyh prev, 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 = cursor_to_xyh next, 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
- constructor: (in_el, options = {}) ->
+ # 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 = []
- @iframe = domify iframe: class: 'peach_html5_editor'
+ @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
- opt_fragment = options.fragment ? true
+ @poll_for_blur_timeout = null
+ @iframe_offset = null
+ @iframe_height = null
+ opt_fragment = @options.fragment ? true
@parser_opts = {}
if opt_fragment
@parser_opts.fragment = 'body'
- @iframe.onload = =>
- @idoc = @iframe.contentDocument
-
- ignore_key_codes =
- '18': true # alt
- '20': true # capslock
- '17': true # ctrl
- '144': true # numlock
- '16': true # shift
- '91': true # windows "start" key
- 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
-
- @idoc.body.onkeyup = (e) =>
- return if e.ctrlKey
- return false if ignore_key_codes[e.keyCode]?
- #return false if control_key_codes[e.keyCode]?
- @idoc.body.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...
- if new_cursor?
- @move_cursor new_cursor
- else
- for c in @tree
- new_cursor = find_next_cursor_position @tree, c, -1
- if new_cursor?
+ @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 @iframe_offset?
+ @iframe_offset = get_el_bounds @iframe
+ x = e.pageX # TODO ?cross-browserify
+ y = e.pageY + @wrap2.scrollTop # TODO ?cross-browserify
+ # TODO adjust for scrolling
+ return x: x - @iframe_offset.x, y: y - @iframe_offset.y
+ onclick: (e) ->
+ xy = @overlay_event_to_inner_xy e
+ new_cursor = find_loc_cursor_position @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...
+ if new_cursor?
+ @move_cursor new_cursor
+ else
+ for c in @tree
+ new_cursor = find_next_cursor_position @tree, c, -1
+ if new_cursor?
+ @move_cursor new_cursor
+ break
+ return false
+ when KEY_UP
+ if @cursor?
+ new_cursor = @cursor
+ old_loc = cursor_to_xyh new_cursor[0], new_cursor[1]
+ new_loc = x: old_loc.x, y: old_loc.y
+ while new_loc.y >= old_loc.y
+ new_cursor = find_prev_cursor_position @tree, new_cursor[0], new_cursor[1]
+ return false unless new_cursor?
+ new_loc = cursor_to_xyh new_cursor[0], new_cursor[1]
+ if new_cursor?
+ # now we're above
+ if new_loc.x <= old_loc.x
+ @move_cursor new_cursor
+ return false
+ target_y = new_loc.y
+ # search leftward, until we find the closest position
+ while new_loc.x > old_loc.x and new_loc.y is target_y
+ prev_loc = new_loc
+ prev_cursor = new_cursor
+ new_cursor = find_prev_cursor_position @tree, new_cursor[0], new_cursor[1]
+ break unless new_cursor?
+ new_loc = cursor_to_xyh new_cursor[0], new_cursor[1]
+ # move cursor to prev_cursor or new_cursor
+ if new_cursor?
+ if new_loc.y is target_y
+ # both valid, and on the same line, use closest
+ if (old_loc.x - new_loc.x) < (prev_loc.x - old_loc.x)
@move_cursor new_cursor
- break
- return false
- when KEY_UP
- return false
- when KEY_RIGHT
- if @cursor?
- new_cursor = find_next_cursor_position @tree, @cursor...
- if new_cursor?
- @move_cursor new_cursor
+ else
+ @move_cursor prev_cursor
+ else
+ # new_cursor on wrong line, use prev_cursor
+ @move_cursor prev_cursor
else
- for c in @tree
- new_cursor = find_prev_cursor_position @tree, c, -1
- if new_cursor?
- @move_cursor new_cursor
- break
- return false
- when KEY_DOWN
- return false
- when KEY_END
- return false
- when KEY_BACKSPACE
- return false
- when KEY_DELETE
- 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
- @idoc.body.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]
+ # can't go any further prev, use prev_cursor
+ @move_cursor prev_cursor
+ else
+ # move cursor to first position in document
+ new_cursor = find_prev_cursor_position @tree
+ if new_cursor?
+ @move_cursor new_cursor
+ break
return false
- if options.stylesheet # TODO test this
- istyle = @idoc.createElement 'style'
- istyle.setAttribute 'src', options.stylesheet
- @idoc.head.appendChild istyle
- icss = @idoc.createElement 'style'
- icss.appendChild @idoc.createTextNode css
- @idoc.head.appendChild icss
- @load_html @in_el.value
-
- @in_el.parentNode.appendChild @iframe
- clear_dom: ->
- # FIXME add parent node, so we don't empty body and delete cursor_el
+ when KEY_RIGHT
+ if @cursor?
+ new_cursor = find_next_cursor_position @tree, @cursor...
+ if new_cursor?
+ @move_cursor new_cursor
+ else
+ # move cursor to first position in document
+ new_cursor = find_prev_cursor_position @tree
+ if new_cursor?
+ @move_cursor new_cursor
+ break
+ 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]
- @cursor_visible = false
+ @kill_cursor()
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
+ 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
+ @matt null
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
+ # replace cursor element, to reset blink animation
if @cursor_visible
@cursor_el.parentNode.removeChild @cursor_el
- @cursor_el = domify div: id: 'peach_html5_editor_cursor'
- @idoc.body.appendChild @cursor_el
+ @cursor_el = domify @outer_idoc, div: id: 'cursor'
+ @overlay.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"
+ @cursor_el.style.left = "#{loc.x + overlay_padding - 1}px"
+ if loc.h < 5
+ height = 12
+ else
+ height = loc.h
+ @cursor_el.style.top = "#{loc.y + overlay_padding + Math.round(height * .07)}px"
+ @cursor_el.style.height = "#{Math.round height * 0.82}px"
+ @matt cursor[0]
+ matt: (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
+ matt = 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 matt
+ @matting.push matt
+ ann = 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
+ @matting.push ann
+ 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 += "#{n.name}>"
+ 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...