X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=editor.coffee;h=d4c03796210d9bd3d4dcd56b09e24599d873c3e8;hb=af8b09c263ac9d0095c191a3fb972bbae97fcae2;hp=0f68f40e4f486b8d9ea72be1f76bfebc95bf4cbf;hpb=a85e7976ce04ccbceb207ffe60ffbd212eb5a789;p=peach-html5-editor.git

diff --git a/editor.coffee b/editor.coffee
index 0f68f40..d4c0379 100644
--- a/editor.coffee
+++ b/editor.coffee
@@ -14,6 +14,82 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+TYPE_TAG = peach_parser.TYPE_TAG
+TYPE_TEXT = peach_parser.TYPE_TEXT
+TYPE_COMMENT = peach_parser.TYPE_COMMENT
+TYPE_DOCTYPE = peach_parser.TYPE_DOCTYPE
+
+get_el_bounds = (el) ->
+	rect = el.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)
+	}
+
+# figure out the top/left 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
+	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
+	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) ->
@@ -43,7 +119,7 @@ dom_to_html = (dom) ->
 	ret = ''
 	for el in dom
 		switch el.type
-			when wheic_parser.TYPE_TAG
+			when TYPE_TAG
 				ret += '<' + el.name
 				attr_keys = []
 				for k of el.attrs
@@ -58,11 +134,11 @@ dom_to_html = (dom) ->
 					if el.children.length
 						ret += dom_to_html el.children
 					ret += "</#{el.name}>"
-			when wheic_parser.TYPE_TEXT
+			when TYPE_TEXT
 				ret += el.text
-			when wheic_parser.TYPE_COMMENT
+			when TYPE_COMMENT
 				ret += "<!--#{el.text}-->"
-			when wheic_parser.TYPE_DOCTYPE
+			when TYPE_DOCTYPE
 				ret += "<!DOCTYPE #{el.name}"
 				if el.public_identifier? and el.public_identifier.length > 0
 					ret += " \"#{el.public_identifier}\""
@@ -85,8 +161,8 @@ domify = (h) ->
 	return el
 
 css = ''
-css += 'span.peach_editor_cursor {'
-css +=     'display: inline-block;'
+css += 'div#peach_html5_editor_cursor {'
+css +=     'position: absolute;'
 css +=     'height: 1em;'
 css +=     'width: 2px;'
 css +=     'margin-left: -1px;'
@@ -96,48 +172,240 @@ css +=     '-webkit-animation: 1s blink step-end infinite;'
 css +=     'animation: 1s blink step-end infinite;'
 css += '}'
 css += '@-webkit-keyframes "blink" {'
-css +=     'from, to { background: transparent; }'
-css +=     '50% { background: #000; }'
+css +=     'from, to { background: #000; }'
+css +=     '50% { background: transparent; }'
 css += '}'
 css += '@keyframes "blink" {'
-css +=     'from, to { background: transparent; }'
-css +=     '50% { background: #000; }'
+css +=     'from, to { background: #000; }'
+css +=     '50% { background: transparent; }'
 css += '}'
 
-wysiwyg = (el, options = {}) ->
-	opt_fragment = options.fragment ? true
-	parser_opts = {}
-	if opt_fragment
-		parser_opts.fragment = 'body'
-	editor_instance = {
-		dom: []
-		iframe: document.createElement('iframe')
-		load_html: (html) ->
-			@dom = wheic_parser.parse html, parser_opts
-			as_html = wheic.dom_to_html @dom
-			as_html = as_html.substr(0, 5) + '<span class="peach_editor_cursor"></span>' + as_html.substr(5)
-			@iframe.contentDocument.body.innerHTML = as_html
-	}
-	el.parentNode.appendChild editor_instance.iframe
-	idoc = editor_instance.iframe.contentDocument
-	idoc.body.onkeypress = (e) ->
-		char = e.charCode ? e.keyCode ? e.which
-		el.value += String.fromCharCode char
-		editor_instance.load_html el.value
-		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
-	editor_instance.load_html el.value
-	return editor_instance
-
-window.wheic = {
-	wysiwyg: wysiwyg
-	dom_to_html: dom_to_html
-}
+# key codes:
+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
+
+instantiate_tree = (tree, parent) ->
+	for c in tree
+		switch c.type
+			when TYPE_TEXT
+				c.el = parent.ownerDocument.createTextNode c.text
+				parent.appendChild c.el
+			when TYPE_TAG
+				# 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
+				parent.appendChild c.el
+				if c.children.length
+					instantiate_tree c.children, c.el
+
+traverse_tree = (tree, state, cb) ->
+	for c in tree
+		cb c, state
+		break if state.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
+		if node is n
+			state.before = false
+	if found.node?
+		return [found.node, 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
+		return [n, i - 1]
+	found = traverse_tree top, before: n?, (node, state) ->
+		if node.type is TYPE_TEXT
+			unless n?
+				state.node = node
+				state.done = 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]
+	return null
+
+class PeachHTML5Editor
+	constructor: (in_el, options = {}) ->
+		@in_el = in_el
+		@tree = []
+		@iframe = domify iframe: class: 'peach_html5_editor'
+		@cursor = null
+		@cursor_el = null
+		@cursor_visible = false
+		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?
+									@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
+							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]
+				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
+		while @idoc.body.childNodes.length
+			@idoc.body.removeChild @idoc.body.childNodes[0]
+		@cursor_visible = false
+		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
+	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.parentNode.removeChild @cursor_el
+		@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"
+
+window.peach_html5_editor = (args...) ->
+	return new PeachHTML5Editor args...
 
-# test in browser: wheic(document.getElementsByTagName('textarea')[0])
+# test in browser: peach_html5_editor(document.getElementsByTagName('textarea')[0])