X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=editor.coffee;h=80141882067bfc78126ecec33d2d2bdfd39a45fe;hb=833a4fc56ec6e313b2899714be4fee2ff703eeff;hp=d4c03796210d9bd3d4dcd56b09e24599d873c3e8;hpb=af8b09c263ac9d0095c191a3fb972bbae97fcae2;p=peach-html5-editor.git

diff --git a/editor.coffee b/editor.coffee
index d4c0379..8014188 100644
--- a/editor.coffee
+++ b/editor.coffee
@@ -19,8 +19,23 @@ TYPE_TEXT = peach_parser.TYPE_TEXT
 TYPE_COMMENT = peach_parser.TYPE_COMMENT
 TYPE_DOCTYPE = peach_parser.TYPE_DOCTYPE
 
+debug_dot_at = (doc, x, y) ->
+	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_text_bounding_rect = (el) ->
 get_el_bounds = (el) ->
-	rect = el.getBoundingClientRect()
+	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
@@ -32,64 +47,47 @@ get_el_bounds = (el) ->
 		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"
-	parent = n.el.parentNode
-	els = []
-	txts = []
+window.cursor_to_xyh = cursor_to_xyh = (n, i) ->
+	range = document.createRange()
 	plus_width = false
-	if n.text.length < 2
-		bounds = get_el_offset n.el
-		if i is 1
-			plus_width = true
+	if n.text.length is 0
+		range.setStart n.el, i
+		range.setEnd n.el, i
+	if i is n.text.length
+		range.setStart n.el, i - 1
+		range.setEnd n.el, i
+		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
+		range.setStart n.el, i
+		range.setEnd n.el, i + 1
+	# chromium returns bogus results with getBoundingClientRect() when zero width and/or height
+	rect = range.getClientRects()
+	if rect.length > 0
+		if plus_width
+			# chromium returns multiple rects for the space that is broken
+			# across lines by word-wrap (firefox doesn't)
+			rect = rect[rect.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
+			rect = rect[0]
+	else
+		return x: 0, y: 0, w: 0, h: 0 # TODO return null, fix callers
+	doc = n.el.ownerDocument.documentElement
+	win = n.el.ownerDocument.defaultView
+	y_fix = win.pageYOffset - doc.clientTop
+	x_fix = win.pageXOffset - doc.clientLeft
+	ret = {
+		x: rect.left + x_fix
+		y: rect.top + y_fix
+		w: rect.width ? (rect.right - rect.left)
+		h: rect.height ? (rect.top - rect.bottom)
+	}
 	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
+		ret.x += ret.w
+	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) ->
@@ -167,17 +165,15 @@ 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 +=     '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:
@@ -220,12 +216,16 @@ 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) ->
+		orig_xyh = cursor_to_xyh n, i
+		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.x > orig_xyh.x or next_xyh.y > orig_xyh.y
+				return [n, next_i]
+	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
@@ -236,10 +236,15 @@ 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
+		orig_xyh = cursor_to_xyh n, i
+		for prev_i in [i-1 .. 0]
+			prev_xyh = cursor_to_xyh n, prev_i
+			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) ->
+	found = traverse_tree tree, before: n?, (node, state) ->
 		if node.type is TYPE_TEXT
 			unless n?
 				state.node = node
@@ -254,6 +259,52 @@ 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
+					# 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
+					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
@@ -293,6 +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]?
@@ -333,8 +389,18 @@ class PeachHTML5Editor
 					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
@@ -392,7 +458,8 @@ class PeachHTML5Editor
 		@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]
+		loc = cursor_to_xyh cursor[0], cursor[1]
+		return if loc is null
 		@cursor = cursor
 		# replace cursor, to reset blink animation
 		if @cursor_visible
@@ -400,10 +467,9 @@ 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
+		@cursor_el.style.left = "#{loc.x}px"
+		@cursor_el.style.top = "#{loc.y}px"
 
 window.peach_html5_editor = (args...) ->
 	return new PeachHTML5Editor args...