X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=editor.coffee;h=e3b922e4a80ed78fadf11c3d5718a869daf4860d;hb=7eb32af0eb10fd084b9179b1a266bd5236caebc9;hp=defecba6f56c8635a98f4da7826a6edc7fbb456e;hpb=33e750fec2426e7ab0f7f02d2d1cf76a3bf7091b;p=peach-html5-editor.git

diff --git a/editor.coffee b/editor.coffee
index defecba..e3b922e 100644
--- a/editor.coffee
+++ b/editor.coffee
@@ -19,54 +19,84 @@ TYPE_TEXT = peach_parser.TYPE_TEXT
 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) ->
@@ -197,12 +227,12 @@ traverse_tree = (tree, state, cb) ->
 			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
@@ -213,10 +243,10 @@ find_next_cursor_position = (top, n, i) ->
 	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
@@ -231,6 +261,50 @@ find_prev_cursor_position = (top, n, i) ->
 		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
@@ -270,6 +344,11 @@ class PeachHTML5Editor
 				'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]?
@@ -377,10 +456,10 @@ class PeachHTML5Editor
 		@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...