X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=editor.coffee;h=956ade0ae3136df6681e73dbce20f980fac62ab6;hb=79ae5031487421570f891321de8063a64455189e;hp=faa2e3f25462bb44211107f980e8a9b88de31dd9;hpb=0f0011fe19f527abc6d67c7245720d5d451085f5;p=peach-html5-editor.git diff --git a/editor.coffee b/editor.coffee index faa2e3f..956ade0 100644 --- a/editor.coffee +++ b/editor.coffee @@ -14,6 +14,76 @@ # 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 + +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) -> + 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) + } + +# figure out the x/y coordinates of where the cursor should be if it's at +# position ``i`` within text node ``n`` +window.cursor_to_xyh = cursor_to_xyh = (n, i) -> + range = document.createRange() + plus_width = false + 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 + 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 + rect = rect[0] + else + return x: 0, y: 0, w: 0, h: 0 # TODO return null, fix callers + ret = { + x: rect.left + y: rect.top + w: rect.width ? (rect.right - rect.left) + h: rect.height ? (rect.top - rect.bottom) + } + if plus_width + ret.x += ret.w + debug_dot_at n.el.ownerDocument, ret.x, ret.y + return ret + # encode text so it can be safely placed inside an html attribute enc_attr_regex = new RegExp '(&)|(")|(\u00A0)', 'g' enc_attr = (txt) -> @@ -43,7 +113,7 @@ dom_to_html = (dom) -> ret = '' for el in dom switch el.type - when peach_parser.TYPE_TAG + when TYPE_TAG ret += '<' + el.name attr_keys = [] for k of el.attrs @@ -58,11 +128,11 @@ dom_to_html = (dom) -> if el.children.length ret += dom_to_html el.children ret += "" - when peach_parser.TYPE_TEXT + when TYPE_TEXT ret += el.text - when peach_parser.TYPE_COMMENT + when TYPE_COMMENT ret += "" - when peach_parser.TYPE_DOCTYPE + when TYPE_DOCTYPE ret += " 0 ret += " \"#{el.public_identifier}\"" @@ -85,23 +155,21 @@ domify = (h) -> return el css = '' -css += 'div#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;' 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: @@ -120,74 +188,286 @@ KEY_PAGE_UP = 33 KEY_PAGE_DOWN = 34 KEY_TAB = 9 -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 = peach_parser.parse html, parser_opts - as_html = peach.dom_to_html @dom - as_html = as_html.substr(0, 5) + '' + as_html.substr(5) - @iframe.contentDocument.body.innerHTML = as_html - } - el.parentNode.appendChild editor_instance.iframe - idoc = editor_instance.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 false if ignore_key_codes[e.keyCode]? - return false if control_key_codes[e.keyCode]? - idoc.body.onkeydown = (e) -> - return false if ignore_key_codes[e.keyCode]? - return false if control_key_codes[e.keyCode]? - idoc.body.onkeypress = (e) -> - return if e.ctrlKey - return false if ignore_key_codes[e.keyCode]? - # in firefox, keyCode is only set for non-typing keys - if e.keyCode isnt KEY_BACKSPACE # so this is fine - return false if control_key_codes[e.keyCode]? - char = e.charCode ? e.keyCode - 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.peach = { - wysiwyg: wysiwyg - dom_to_html: dom_to_html -} +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 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 = (tree, n, i) -> + if n? and n.type is TYPE_TEXT and n.text.length > i + 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 + 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 = (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 tree, 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 + +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 + @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.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]? + #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 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 + 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) -> + loc = cursor_to_xyh cursor[0], cursor[1] + return if loc is null + @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 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... -# test in browser: peach.wysiwyg(document.getElementsByTagName('textarea')[0]) +# test in browser: peach_html5_editor(document.getElementsByTagName('textarea')[0])