1320 lines
48 KiB
JavaScript
1320 lines
48 KiB
JavaScript
/* The Editor object manages the content of the editable frame. It
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* catches events, colours nodes, and indents lines. This file also
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* holds some functions for transforming arbitrary DOM structures into
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* plain sequences of <span> and <br> elements
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*/
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// Make sure a string does not contain two consecutive 'collapseable'
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// whitespace characters.
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function makeWhiteSpace(n) {
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var buffer = [], nb = true;
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for (; n > 0; n--) {
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buffer.push((nb || n == 1) ? nbsp : " ");
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nb = !nb;
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}
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return buffer.join("");
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}
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// Create a set of white-space characters that will not be collapsed
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// by the browser, but will not break text-wrapping either.
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function fixSpaces(string) {
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if (string.charAt(0) == " ") string = nbsp + string.slice(1);
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return string.replace(/\t/g, function(){return makeWhiteSpace(indentUnit);})
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.replace(/[ \u00a0]{2,}/g, function(s) {return makeWhiteSpace(s.length);});
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}
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function cleanText(text) {
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return text.replace(/\u00a0/g, " ").replace(/\u200b/g, "");
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}
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// Create a SPAN node with the expected properties for document part
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// spans.
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function makePartSpan(value, doc) {
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var text = value;
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if (value.nodeType == 3) text = value.nodeValue;
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else value = doc.createTextNode(text);
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var span = doc.createElement("SPAN");
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span.isPart = true;
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span.appendChild(value);
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span.currentText = text;
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return span;
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}
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// On webkit, when the last BR of the document does not have text
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// behind it, the cursor can not be put on the line after it. This
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// makes pressing enter at the end of the document occasionally do
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// nothing (or at least seem to do nothing). To work around it, this
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// function makes sure the document ends with a span containing a
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// zero-width space character. The traverseDOM iterator filters such
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// character out again, so that the parsers won't see them. This
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// function is called from a few strategic places to make sure the
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// zwsp is restored after the highlighting process eats it.
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var webkitLastLineHack = webkit ?
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function(container) {
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var last = container.lastChild;
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if (!last || !last.isPart || last.textContent != "\u200b")
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container.appendChild(makePartSpan("\u200b", container.ownerDocument));
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} : function() {};
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var Editor = (function(){
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// The HTML elements whose content should be suffixed by a newline
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// when converting them to flat text.
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var newlineElements = {"P": true, "DIV": true, "LI": true};
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function asEditorLines(string) {
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var tab = makeWhiteSpace(indentUnit);
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return map(string.replace(/\t/g, tab).replace(/\u00a0/g, " ").replace(/\r\n?/g, "\n").split("\n"), fixSpaces);
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}
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// Helper function for traverseDOM. Flattens an arbitrary DOM node
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// into an array of textnodes and <br> tags.
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function simplifyDOM(root, atEnd) {
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var doc = root.ownerDocument;
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var result = [];
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var leaving = true;
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function simplifyNode(node, top) {
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if (node.nodeType == 3) {
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var text = node.nodeValue = fixSpaces(node.nodeValue.replace(/[\r\u200b]/g, "").replace(/\n/g, " "));
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if (text.length) leaving = false;
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result.push(node);
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}
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else if (node.nodeName == "BR" && node.childNodes.length == 0) {
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leaving = true;
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result.push(node);
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}
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else {
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forEach(node.childNodes, simplifyNode);
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if (!leaving && newlineElements.hasOwnProperty(node.nodeName)) {
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leaving = true;
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if (!atEnd || !top)
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result.push(doc.createElement("BR"));
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}
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}
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}
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simplifyNode(root, true);
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return result;
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}
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// Creates a MochiKit-style iterator that goes over a series of DOM
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// nodes. The values it yields are strings, the textual content of
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// the nodes. It makes sure that all nodes up to and including the
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// one whose text is being yielded have been 'normalized' to be just
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// <span> and <br> elements.
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// See the story.html file for some short remarks about the use of
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// continuation-passing style in this iterator.
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function traverseDOM(start){
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function yield(value, c){cc = c; return value;}
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function push(fun, arg, c){return function(){return fun(arg, c);};}
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function stop(){cc = stop; throw StopIteration;};
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var cc = push(scanNode, start, stop);
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var owner = start.ownerDocument;
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var nodeQueue = [];
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// Create a function that can be used to insert nodes after the
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// one given as argument.
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function pointAt(node){
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var parent = node.parentNode;
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var next = node.nextSibling;
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return function(newnode) {
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parent.insertBefore(newnode, next);
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};
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}
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var point = null;
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// Insert a normalized node at the current point. If it is a text
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// node, wrap it in a <span>, and give that span a currentText
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// property -- this is used to cache the nodeValue, because
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// directly accessing nodeValue is horribly slow on some browsers.
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// The dirty property is used by the highlighter to determine
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// which parts of the document have to be re-highlighted.
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function insertPart(part){
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var text = "\n";
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if (part.nodeType == 3) {
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select.snapshotChanged();
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part = makePartSpan(part, owner);
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text = part.currentText;
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}
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part.dirty = true;
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nodeQueue.push(part);
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point(part);
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return text;
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}
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// Extract the text and newlines from a DOM node, insert them into
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// the document, and yield the textual content. Used to replace
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// non-normalized nodes.
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function writeNode(node, c, end) {
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var toYield = [];
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forEach(simplifyDOM(node, end), function(part) {
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toYield.push(insertPart(part));
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});
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return yield(toYield.join(""), c);
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}
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// Check whether a node is a normalized <span> element.
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function partNode(node){
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if (node.isPart && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
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node.currentText = node.firstChild.nodeValue;
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return !/[\n\t\r]/.test(node.currentText);
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}
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return false;
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}
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// Handle a node. Add its successor to the continuation if there
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// is one, find out whether the node is normalized. If it is,
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// yield its content, otherwise, normalize it (writeNode will take
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// care of yielding).
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function scanNode(node, c){
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if (node.nextSibling)
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c = push(scanNode, node.nextSibling, c);
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if (partNode(node)){
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nodeQueue.push(node);
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return yield(node.currentText, c);
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}
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else if (node.nodeName == "BR") {
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nodeQueue.push(node);
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return yield("\n", c);
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}
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else {
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var end = !node.nextSibling;
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point = pointAt(node);
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removeElement(node);
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return writeNode(node, c, end);
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}
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}
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// MochiKit iterators are objects with a next function that
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// returns the next value or throws StopIteration when there are
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// no more values.
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return {next: function(){return cc();}, nodes: nodeQueue};
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}
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// Determine the text size of a processed node.
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function nodeSize(node) {
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if (node.nodeName == "BR")
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return 1;
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else
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return node.currentText.length;
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}
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// Search backwards through the top-level nodes until the next BR or
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// the start of the frame.
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function startOfLine(node) {
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while (node && node.nodeName != "BR") node = node.previousSibling;
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return node;
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}
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function endOfLine(node, container) {
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if (!node) node = container.firstChild;
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else if (node.nodeName == "BR") node = node.nextSibling;
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while (node && node.nodeName != "BR") node = node.nextSibling;
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return node;
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}
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function time() {return new Date().getTime();}
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// Client interface for searching the content of the editor. Create
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// these by calling CodeMirror.getSearchCursor. To use, call
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// findNext on the resulting object -- this returns a boolean
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// indicating whether anything was found, and can be called again to
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// skip to the next find. Use the select and replace methods to
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// actually do something with the found locations.
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function SearchCursor(editor, string, fromCursor) {
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this.editor = editor;
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this.history = editor.history;
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this.history.commit();
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// Are we currently at an occurrence of the search string?
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this.atOccurrence = false;
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// The object stores a set of nodes coming after its current
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// position, so that when the current point is taken out of the
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// DOM tree, we can still try to continue.
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this.fallbackSize = 15;
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var cursor;
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// Start from the cursor when specified and a cursor can be found.
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if (fromCursor && (cursor = select.cursorPos(this.editor.container))) {
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this.line = cursor.node;
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this.offset = cursor.offset;
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}
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else {
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this.line = null;
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this.offset = 0;
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}
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this.valid = !!string;
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// Create a matcher function based on the kind of string we have.
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var target = string.split("\n"), self = this;
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this.matches = (target.length == 1) ?
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// For one-line strings, searching can be done simply by calling
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// indexOf on the current line.
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function() {
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var match = cleanText(self.history.textAfter(self.line).slice(self.offset)).indexOf(string);
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if (match > -1)
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return {from: {node: self.line, offset: self.offset + match},
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to: {node: self.line, offset: self.offset + match + string.length}};
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} :
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// Multi-line strings require internal iteration over lines, and
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// some clunky checks to make sure the first match ends at the
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// end of the line and the last match starts at the start.
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function() {
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var firstLine = cleanText(self.history.textAfter(self.line).slice(self.offset));
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var match = firstLine.lastIndexOf(target[0]);
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if (match == -1 || match != firstLine.length - target[0].length)
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return false;
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var startOffset = self.offset + match;
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var line = self.history.nodeAfter(self.line);
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for (var i = 1; i < target.length - 1; i++) {
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if (cleanText(self.history.textAfter(line)) != target[i])
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return false;
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line = self.history.nodeAfter(line);
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}
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if (cleanText(self.history.textAfter(line)).indexOf(target[target.length - 1]) != 0)
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return false;
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return {from: {node: self.line, offset: startOffset},
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to: {node: line, offset: target[target.length - 1].length}};
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};
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}
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SearchCursor.prototype = {
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findNext: function() {
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if (!this.valid) return false;
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this.atOccurrence = false;
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var self = this;
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// Go back to the start of the document if the current line is
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// no longer in the DOM tree.
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if (this.line && !this.line.parentNode) {
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this.line = null;
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this.offset = 0;
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}
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// Set the cursor's position one character after the given
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// position.
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function saveAfter(pos) {
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if (self.history.textAfter(pos.node).length > pos.offset) {
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self.line = pos.node;
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self.offset = pos.offset + 1;
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}
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else {
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self.line = self.history.nodeAfter(pos.node);
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self.offset = 0;
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}
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}
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while (true) {
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var match = this.matches();
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// Found the search string.
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if (match) {
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this.atOccurrence = match;
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saveAfter(match.from);
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return true;
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}
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this.line = this.history.nodeAfter(this.line);
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this.offset = 0;
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// End of document.
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if (!this.line) {
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this.valid = false;
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return false;
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}
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}
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},
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select: function() {
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if (this.atOccurrence) {
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select.setCursorPos(this.editor.container, this.atOccurrence.from, this.atOccurrence.to);
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select.scrollToCursor(this.editor.container);
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}
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},
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replace: function(string) {
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if (this.atOccurrence) {
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var end = this.editor.replaceRange(this.atOccurrence.from, this.atOccurrence.to, string);
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this.line = end.node;
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this.offset = end.offset;
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this.atOccurrence = false;
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}
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}
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};
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// The Editor object is the main inside-the-iframe interface.
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function Editor(options) {
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this.options = options;
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window.indentUnit = options.indentUnit;
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this.parent = parent;
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this.doc = document;
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var container = this.container = this.doc.body;
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this.win = window;
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this.history = new History(container, options.undoDepth, options.undoDelay,
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this, options.onChange);
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var self = this;
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if (!Editor.Parser)
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throw "No parser loaded.";
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if (options.parserConfig && Editor.Parser.configure)
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Editor.Parser.configure(options.parserConfig);
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if (!options.readOnly)
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select.setCursorPos(container, {node: null, offset: 0});
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this.dirty = [];
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if (options.content)
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this.importCode(options.content);
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else // FF acts weird when the editable document is completely empty
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container.appendChild(this.doc.createElement("BR"));
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if (!options.readOnly) {
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if (options.continuousScanning !== false) {
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this.scanner = this.documentScanner(options.passTime);
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this.delayScanning();
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}
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function setEditable() {
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// In IE, designMode frames can not run any scripts, so we use
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// contentEditable instead.
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if (document.body.contentEditable != undefined && internetExplorer)
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document.body.contentEditable = "true";
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else
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document.designMode = "on";
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document.documentElement.style.borderWidth = "0";
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if (!options.textWrapping)
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container.style.whiteSpace = "nowrap";
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}
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// If setting the frame editable fails, try again when the user
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// focus it (happens when the frame is not visible on
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// initialisation, in Firefox).
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try {
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setEditable();
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}
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catch(e) {
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var focusEvent = addEventHandler(document, "focus", function() {
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focusEvent();
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setEditable();
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}, true);
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}
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addEventHandler(document, "keydown", method(this, "keyDown"));
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addEventHandler(document, "keypress", method(this, "keyPress"));
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addEventHandler(document, "keyup", method(this, "keyUp"));
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function cursorActivity() {self.cursorActivity(false);}
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addEventHandler(document.body, "mouseup", cursorActivity);
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addEventHandler(document.body, "cut", cursorActivity);
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addEventHandler(document.body, "paste", function(event) {
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cursorActivity();
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var text = null;
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try {
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var clipboardData = event.clipboardData || window.clipboardData;
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if (clipboardData) text = clipboardData.getData('Text');
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}
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catch(e) {}
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if (text !== null) {
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self.replaceSelection(text);
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event.stop();
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}
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});
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addEventHandler(document.body, "beforepaste", method(this, "reroutePasteEvent"));
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if (this.options.autoMatchParens)
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addEventHandler(document.body, "click", method(this, "scheduleParenBlink"));
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}
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else if (!options.textWrapping) {
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container.style.whiteSpace = "nowrap";
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}
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}
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function isSafeKey(code) {
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return (code >= 16 && code <= 18) || // shift, control, alt
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(code >= 33 && code <= 40); // arrows, home, end
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}
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Editor.prototype = {
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// Import a piece of code into the editor.
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importCode: function(code) {
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this.history.push(null, null, asEditorLines(code));
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this.history.reset();
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},
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// Extract the code from the editor.
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getCode: function() {
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if (!this.container.firstChild)
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return "";
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var accum = [];
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select.markSelection(this.win);
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forEach(traverseDOM(this.container.firstChild), method(accum, "push"));
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webkitLastLineHack(this.container);
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select.selectMarked();
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return cleanText(accum.join(""));
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},
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checkLine: function(node) {
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if (node === false || !(node == null || node.parentNode == this.container))
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throw parent.CodeMirror.InvalidLineHandle;
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},
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cursorPosition: function(start) {
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if (start == null) start = true;
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var pos = select.cursorPos(this.container, start);
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if (pos) return {line: pos.node, character: pos.offset};
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else return {line: null, character: 0};
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},
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firstLine: function() {
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return null;
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},
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lastLine: function() {
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if (this.container.lastChild) return startOfLine(this.container.lastChild);
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else return null;
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},
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nextLine: function(line) {
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this.checkLine(line);
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var end = endOfLine(line, this.container);
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return end || false;
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},
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prevLine: function(line) {
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this.checkLine(line);
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if (line == null) return false;
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return startOfLine(line.previousSibling);
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},
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selectLines: function(startLine, startOffset, endLine, endOffset) {
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this.checkLine(startLine);
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var start = {node: startLine, offset: startOffset}, end = null;
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if (endOffset !== undefined) {
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this.checkLine(endLine);
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end = {node: endLine, offset: endOffset};
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}
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select.setCursorPos(this.container, start, end);
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select.scrollToCursor(this.container);
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},
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lineContent: function(line) {
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this.checkLine(line);
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var accum = [];
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for (line = line ? line.nextSibling : this.container.firstChild;
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line && line.nodeName != "BR"; line = line.nextSibling)
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accum.push(nodeText(line));
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return cleanText(accum.join(""));
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},
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setLineContent: function(line, content) {
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this.history.commit();
|
|
this.replaceRange({node: line, offset: 0},
|
|
{node: line, offset: this.history.textAfter(line).length},
|
|
content);
|
|
this.addDirtyNode(line);
|
|
this.scheduleHighlight();
|
|
},
|
|
|
|
insertIntoLine: function(line, position, content) {
|
|
var before = null;
|
|
if (position == "end") {
|
|
before = endOfLine(line, this.container);
|
|
}
|
|
else {
|
|
for (var cur = line ? line.nextSibling : this.container.firstChild; cur; cur = cur.nextSibling) {
|
|
if (position == 0) {
|
|
before = cur;
|
|
break;
|
|
}
|
|
var text = (cur.innerText || cur.textContent || cur.nodeValue || "");
|
|
if (text.length > position) {
|
|
before = cur.nextSibling;
|
|
content = text.slice(0, position) + content + text.slice(position);
|
|
removeElement(cur);
|
|
break;
|
|
}
|
|
position -= text.length;
|
|
}
|
|
}
|
|
|
|
var lines = asEditorLines(content), doc = this.container.ownerDocument;
|
|
for (var i = 0; i < lines.length; i++) {
|
|
if (i > 0) this.container.insertBefore(doc.createElement("BR"), before);
|
|
this.container.insertBefore(makePartSpan(lines[i], doc), before);
|
|
}
|
|
this.addDirtyNode(line);
|
|
this.scheduleHighlight();
|
|
},
|
|
|
|
// Retrieve the selected text.
|
|
selectedText: function() {
|
|
var h = this.history;
|
|
h.commit();
|
|
|
|
var start = select.cursorPos(this.container, true),
|
|
end = select.cursorPos(this.container, false);
|
|
if (!start || !end) return "";
|
|
|
|
if (start.node == end.node)
|
|
return h.textAfter(start.node).slice(start.offset, end.offset);
|
|
|
|
var text = [h.textAfter(start.node).slice(start.offset)];
|
|
for (var pos = h.nodeAfter(start.node); pos != end.node; pos = h.nodeAfter(pos))
|
|
text.push(h.textAfter(pos));
|
|
text.push(h.textAfter(end.node).slice(0, end.offset));
|
|
return cleanText(text.join("\n"));
|
|
},
|
|
|
|
// Replace the selection with another piece of text.
|
|
replaceSelection: function(text) {
|
|
this.history.commit();
|
|
|
|
var start = select.cursorPos(this.container, true),
|
|
end = select.cursorPos(this.container, false);
|
|
if (!start || !end) return;
|
|
|
|
end = this.replaceRange(start, end, text);
|
|
select.setCursorPos(this.container, end);
|
|
webkitLastLineHack(this.container);
|
|
},
|
|
|
|
reroutePasteEvent: function() {
|
|
if (this.capturingPaste || window.opera) return;
|
|
this.capturingPaste = true;
|
|
var te = parent.document.createElement("TEXTAREA");
|
|
te.style.position = "absolute";
|
|
te.style.left = "-500px";
|
|
te.style.width = "10px";
|
|
te.style.top = nodeTop(frameElement) + "px";
|
|
parent.document.body.appendChild(te);
|
|
parent.focus();
|
|
te.focus();
|
|
|
|
var self = this;
|
|
this.parent.setTimeout(function() {
|
|
self.capturingPaste = false;
|
|
self.win.focus();
|
|
if (self.selectionSnapshot) // IE hack
|
|
self.win.select.selectCoords(self.win, self.selectionSnapshot);
|
|
var text = te.value;
|
|
if (text) self.replaceSelection(text);
|
|
removeElement(te);
|
|
}, 10);
|
|
},
|
|
|
|
replaceRange: function(from, to, text) {
|
|
var lines = asEditorLines(text);
|
|
lines[0] = this.history.textAfter(from.node).slice(0, from.offset) + lines[0];
|
|
var lastLine = lines[lines.length - 1];
|
|
lines[lines.length - 1] = lastLine + this.history.textAfter(to.node).slice(to.offset);
|
|
var end = this.history.nodeAfter(to.node);
|
|
this.history.push(from.node, end, lines);
|
|
return {node: this.history.nodeBefore(end),
|
|
offset: lastLine.length};
|
|
},
|
|
|
|
getSearchCursor: function(string, fromCursor) {
|
|
return new SearchCursor(this, string, fromCursor);
|
|
},
|
|
|
|
// Re-indent the whole buffer
|
|
reindent: function() {
|
|
if (this.container.firstChild)
|
|
this.indentRegion(null, this.container.lastChild);
|
|
},
|
|
|
|
reindentSelection: function(direction) {
|
|
if (!select.somethingSelected(this.win)) {
|
|
this.indentAtCursor(direction);
|
|
}
|
|
else {
|
|
var start = select.selectionTopNode(this.container, true),
|
|
end = select.selectionTopNode(this.container, false);
|
|
if (start === false || end === false) return;
|
|
this.indentRegion(start, end, direction);
|
|
}
|
|
},
|
|
|
|
grabKeys: function(eventHandler, filter) {
|
|
this.frozen = eventHandler;
|
|
this.keyFilter = filter;
|
|
},
|
|
ungrabKeys: function() {
|
|
this.frozen = "leave";
|
|
this.keyFilter = null;
|
|
},
|
|
|
|
setParser: function(name) {
|
|
Editor.Parser = window[name];
|
|
if (this.container.firstChild) {
|
|
forEach(this.container.childNodes, function(n) {
|
|
if (n.nodeType != 3) n.dirty = true;
|
|
});
|
|
this.addDirtyNode(this.firstChild);
|
|
this.scheduleHighlight();
|
|
}
|
|
},
|
|
|
|
// Intercept enter and tab, and assign their new functions.
|
|
keyDown: function(event) {
|
|
if (this.frozen == "leave") this.frozen = null;
|
|
if (this.frozen && (!this.keyFilter || this.keyFilter(event.keyCode))) {
|
|
event.stop();
|
|
this.frozen(event);
|
|
return;
|
|
}
|
|
|
|
var code = event.keyCode;
|
|
// Don't scan when the user is typing.
|
|
this.delayScanning();
|
|
// Schedule a paren-highlight event, if configured.
|
|
if (this.options.autoMatchParens)
|
|
this.scheduleParenBlink();
|
|
|
|
// The various checks for !altKey are there because AltGr sets both
|
|
// ctrlKey and altKey to true, and should not be recognised as
|
|
// Control.
|
|
if (code == 13) { // enter
|
|
if (event.ctrlKey && !event.altKey) {
|
|
this.reparseBuffer();
|
|
}
|
|
else {
|
|
select.insertNewlineAtCursor(this.win);
|
|
this.indentAtCursor();
|
|
select.scrollToCursor(this.container);
|
|
}
|
|
event.stop();
|
|
}
|
|
else if (code == 9 && this.options.tabMode != "default") { // tab
|
|
this.handleTab(!event.ctrlKey && !event.shiftKey);
|
|
event.stop();
|
|
}
|
|
else if (code == 32 && event.shiftKey && this.options.tabMode == "default") { // space
|
|
this.handleTab(true);
|
|
event.stop();
|
|
}
|
|
else if (code == 36 && !event.shiftKey && !event.ctrlKey) { // home
|
|
if (this.home())
|
|
event.stop();
|
|
}
|
|
else if ((code == 219 || code == 221) && event.ctrlKey && !event.altKey) { // [, ]
|
|
this.blinkParens(event.shiftKey);
|
|
event.stop();
|
|
}
|
|
else if (event.metaKey && !event.shiftKey && (code == 37 || code == 39)) { // Meta-left/right
|
|
var cursor = select.selectionTopNode(this.container);
|
|
if (cursor === false || !this.container.firstChild) return;
|
|
|
|
if (code == 37) select.focusAfterNode(startOfLine(cursor), this.container);
|
|
else {
|
|
var end = endOfLine(cursor, this.container);
|
|
select.focusAfterNode(end ? end.previousSibling : this.container.lastChild, this.container);
|
|
}
|
|
event.stop();
|
|
}
|
|
else if ((event.ctrlKey || event.metaKey) && !event.altKey) {
|
|
if ((event.shiftKey && code == 90) || code == 89) { // shift-Z, Y
|
|
select.scrollToNode(this.history.redo());
|
|
event.stop();
|
|
}
|
|
else if (code == 90 || (safari && code == 8)) { // Z, backspace
|
|
select.scrollToNode(this.history.undo());
|
|
event.stop();
|
|
}
|
|
else if (code == 83 && this.options.saveFunction) { // S
|
|
this.options.saveFunction();
|
|
event.stop();
|
|
}
|
|
}
|
|
},
|
|
|
|
// Check for characters that should re-indent the current line,
|
|
// and prevent Opera from handling enter and tab anyway.
|
|
keyPress: function(event) {
|
|
var electric = Editor.Parser.electricChars, self = this;
|
|
// Hack for Opera, and Firefox on OS X, in which stopping a
|
|
// keydown event does not prevent the associated keypress event
|
|
// from happening, so we have to cancel enter and tab again
|
|
// here.
|
|
if ((this.frozen && (!this.keyFilter || this.keyFilter(event.keyCode))) ||
|
|
event.code == 13 || (event.code == 9 && this.options.tabMode != "default") ||
|
|
(event.keyCode == 32 && event.shiftKey && this.options.tabMode == "default"))
|
|
event.stop();
|
|
else if (electric && electric.indexOf(event.character) != -1)
|
|
this.parent.setTimeout(function(){self.indentAtCursor(null);}, 0);
|
|
else if ((event.character == "v" || event.character == "V")
|
|
&& (event.ctrlKey || event.metaKey) && !event.altKey) // ctrl-V
|
|
this.reroutePasteEvent();
|
|
},
|
|
|
|
// Mark the node at the cursor dirty when a non-safe key is
|
|
// released.
|
|
keyUp: function(event) {
|
|
this.cursorActivity(isSafeKey(event.keyCode));
|
|
},
|
|
|
|
// Indent the line following a given <br>, or null for the first
|
|
// line. If given a <br> element, this must have been highlighted
|
|
// so that it has an indentation method. Returns the whitespace
|
|
// element that has been modified or created (if any).
|
|
indentLineAfter: function(start, direction) {
|
|
// whiteSpace is the whitespace span at the start of the line,
|
|
// or null if there is no such node.
|
|
var whiteSpace = start ? start.nextSibling : this.container.firstChild;
|
|
if (whiteSpace && !hasClass(whiteSpace, "whitespace"))
|
|
whiteSpace = null;
|
|
|
|
// Sometimes the start of the line can influence the correct
|
|
// indentation, so we retrieve it.
|
|
var firstText = whiteSpace ? whiteSpace.nextSibling : (start ? start.nextSibling : this.container.firstChild);
|
|
var nextChars = (start && firstText && firstText.currentText) ? firstText.currentText : "";
|
|
|
|
// Ask the lexical context for the correct indentation, and
|
|
// compute how much this differs from the current indentation.
|
|
var newIndent = 0, curIndent = whiteSpace ? whiteSpace.currentText.length : 0;
|
|
if (direction != null && this.options.tabMode == "shift")
|
|
newIndent = direction ? curIndent + indentUnit : Math.max(0, curIndent - indentUnit)
|
|
else if (start)
|
|
newIndent = start.indentation(nextChars, curIndent, direction);
|
|
else if (Editor.Parser.firstIndentation)
|
|
newIndent = Editor.Parser.firstIndentation(nextChars, curIndent, direction);
|
|
var indentDiff = newIndent - curIndent;
|
|
|
|
// If there is too much, this is just a matter of shrinking a span.
|
|
if (indentDiff < 0) {
|
|
if (newIndent == 0) {
|
|
if (firstText) select.snapshotMove(whiteSpace.firstChild, firstText.firstChild, 0);
|
|
removeElement(whiteSpace);
|
|
whiteSpace = null;
|
|
}
|
|
else {
|
|
select.snapshotMove(whiteSpace.firstChild, whiteSpace.firstChild, indentDiff, true);
|
|
whiteSpace.currentText = makeWhiteSpace(newIndent);
|
|
whiteSpace.firstChild.nodeValue = whiteSpace.currentText;
|
|
}
|
|
}
|
|
// Not enough...
|
|
else if (indentDiff > 0) {
|
|
// If there is whitespace, we grow it.
|
|
if (whiteSpace) {
|
|
whiteSpace.currentText = makeWhiteSpace(newIndent);
|
|
whiteSpace.firstChild.nodeValue = whiteSpace.currentText;
|
|
}
|
|
// Otherwise, we have to add a new whitespace node.
|
|
else {
|
|
whiteSpace = makePartSpan(makeWhiteSpace(newIndent), this.doc);
|
|
whiteSpace.className = "whitespace";
|
|
if (start) insertAfter(whiteSpace, start);
|
|
else this.container.insertBefore(whiteSpace, this.container.firstChild);
|
|
}
|
|
if (firstText) select.snapshotMove(firstText.firstChild, whiteSpace.firstChild, curIndent, false, true);
|
|
}
|
|
if (indentDiff != 0) this.addDirtyNode(start);
|
|
return whiteSpace;
|
|
},
|
|
|
|
// Re-highlight the selected part of the document.
|
|
highlightAtCursor: function() {
|
|
var pos = select.selectionTopNode(this.container, true);
|
|
var to = select.selectionTopNode(this.container, false);
|
|
if (pos === false || to === false) return;
|
|
|
|
select.markSelection(this.win);
|
|
if (this.highlight(pos, endOfLine(to, this.container), true, 20) === false)
|
|
return false;
|
|
select.selectMarked();
|
|
return true;
|
|
},
|
|
|
|
// When tab is pressed with text selected, the whole selection is
|
|
// re-indented, when nothing is selected, the line with the cursor
|
|
// is re-indented.
|
|
handleTab: function(direction) {
|
|
if (this.options.tabMode == "spaces")
|
|
select.insertTabAtCursor(this.win);
|
|
else
|
|
this.reindentSelection(direction);
|
|
},
|
|
|
|
home: function() {
|
|
var cur = select.selectionTopNode(this.container, true), start = cur;
|
|
if (cur === false || !(!cur || cur.isPart || cur.nodeName == "BR") || !this.container.firstChild)
|
|
return false;
|
|
|
|
while (cur && cur.nodeName != "BR") cur = cur.previousSibling;
|
|
var next = cur ? cur.nextSibling : this.container.firstChild;
|
|
if (next && next != start && next.isPart && hasClass(next, "whitespace"))
|
|
select.focusAfterNode(next, this.container);
|
|
else
|
|
select.focusAfterNode(cur, this.container);
|
|
|
|
select.scrollToCursor(this.container);
|
|
return true;
|
|
},
|
|
|
|
// Delay (or initiate) the next paren blink event.
|
|
scheduleParenBlink: function() {
|
|
if (this.parenEvent) this.parent.clearTimeout(this.parenEvent);
|
|
var self = this;
|
|
this.parenEvent = this.parent.setTimeout(function(){self.blinkParens();}, 300);
|
|
},
|
|
|
|
// Take the token before the cursor. If it contains a character in
|
|
// '()[]{}', search for the matching paren/brace/bracket, and
|
|
// highlight them in green for a moment, or red if no proper match
|
|
// was found.
|
|
blinkParens: function(jump) {
|
|
if (!window.select) return;
|
|
// Clear the event property.
|
|
if (this.parenEvent) this.parent.clearTimeout(this.parenEvent);
|
|
this.parenEvent = null;
|
|
|
|
// Extract a 'paren' from a piece of text.
|
|
function paren(node) {
|
|
if (node.currentText) {
|
|
var match = node.currentText.match(/^[\s\u00a0]*([\(\)\[\]{}])[\s\u00a0]*$/);
|
|
return match && match[1];
|
|
}
|
|
}
|
|
// Determine the direction a paren is facing.
|
|
function forward(ch) {
|
|
return /[\(\[\{]/.test(ch);
|
|
}
|
|
|
|
var ch, self = this, cursor = select.selectionTopNode(this.container, true);
|
|
if (!cursor || !this.highlightAtCursor()) return;
|
|
cursor = select.selectionTopNode(this.container, true);
|
|
if (!(cursor && ((ch = paren(cursor)) || (cursor = cursor.nextSibling) && (ch = paren(cursor)))))
|
|
return;
|
|
// We only look for tokens with the same className.
|
|
var className = cursor.className, dir = forward(ch), match = matching[ch];
|
|
|
|
// Since parts of the document might not have been properly
|
|
// highlighted, and it is hard to know in advance which part we
|
|
// have to scan, we just try, and when we find dirty nodes we
|
|
// abort, parse them, and re-try.
|
|
function tryFindMatch() {
|
|
var stack = [], ch, ok = true;;
|
|
for (var runner = cursor; runner; runner = dir ? runner.nextSibling : runner.previousSibling) {
|
|
if (runner.className == className && runner.nodeName == "SPAN" && (ch = paren(runner))) {
|
|
if (forward(ch) == dir)
|
|
stack.push(ch);
|
|
else if (!stack.length)
|
|
ok = false;
|
|
else if (stack.pop() != matching[ch])
|
|
ok = false;
|
|
if (!stack.length) break;
|
|
}
|
|
else if (runner.dirty || runner.nodeName != "SPAN" && runner.nodeName != "BR") {
|
|
return {node: runner, status: "dirty"};
|
|
}
|
|
}
|
|
return {node: runner, status: runner && ok};
|
|
}
|
|
// Temporarily give the relevant nodes a colour.
|
|
function blink(node, ok) {
|
|
node.style.fontWeight = "bold";
|
|
node.style.color = ok ? "#8F8" : "#F88";
|
|
self.parent.setTimeout(function() {node.style.fontWeight = ""; node.style.color = "";}, 500);
|
|
}
|
|
|
|
while (true) {
|
|
var found = tryFindMatch();
|
|
if (found.status == "dirty") {
|
|
this.highlight(found.node, endOfLine(found.node));
|
|
// Needed because in some corner cases a highlight does not
|
|
// reach a node.
|
|
found.node.dirty = false;
|
|
continue;
|
|
}
|
|
else {
|
|
blink(cursor, found.status);
|
|
if (found.node) {
|
|
blink(found.node, found.status);
|
|
if (jump) select.focusAfterNode(found.node.previousSibling, this.container);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
},
|
|
|
|
// Adjust the amount of whitespace at the start of the line that
|
|
// the cursor is on so that it is indented properly.
|
|
indentAtCursor: function(direction) {
|
|
if (!this.container.firstChild) return;
|
|
// The line has to have up-to-date lexical information, so we
|
|
// highlight it first.
|
|
if (!this.highlightAtCursor()) return;
|
|
var cursor = select.selectionTopNode(this.container, false);
|
|
// If we couldn't determine the place of the cursor,
|
|
// there's nothing to indent.
|
|
if (cursor === false)
|
|
return;
|
|
var lineStart = startOfLine(cursor);
|
|
var whiteSpace = this.indentLineAfter(lineStart, direction);
|
|
if (cursor == lineStart && whiteSpace)
|
|
cursor = whiteSpace;
|
|
// This means the indentation has probably messed up the cursor.
|
|
if (cursor == whiteSpace)
|
|
select.focusAfterNode(cursor, this.container);
|
|
},
|
|
|
|
// Indent all lines whose start falls inside of the current
|
|
// selection.
|
|
indentRegion: function(start, end, direction) {
|
|
var current = (start = startOfLine(start)), before = start && startOfLine(start.previousSibling);
|
|
if (end.nodeName != "BR") end = endOfLine(end, this.container);
|
|
|
|
do {
|
|
var next = endOfLine(current, this.container);
|
|
if (current) this.highlight(before, next, true);
|
|
this.indentLineAfter(current, direction);
|
|
before = current;
|
|
current = next;
|
|
} while (current != end);
|
|
select.setCursorPos(this.container, {node: start, offset: 0}, {node: end, offset: 0});
|
|
},
|
|
|
|
// Find the node that the cursor is in, mark it as dirty, and make
|
|
// sure a highlight pass is scheduled.
|
|
cursorActivity: function(safe) {
|
|
if (internetExplorer) {
|
|
this.container.createTextRange().execCommand("unlink");
|
|
this.selectionSnapshot = select.selectionCoords(this.win);
|
|
}
|
|
|
|
var activity = this.options.cursorActivity;
|
|
if (!safe || activity) {
|
|
var cursor = select.selectionTopNode(this.container, false);
|
|
if (cursor === false || !this.container.firstChild) return;
|
|
cursor = cursor || this.container.firstChild;
|
|
if (activity) activity(cursor);
|
|
if (!safe) {
|
|
this.scheduleHighlight();
|
|
this.addDirtyNode(cursor);
|
|
}
|
|
}
|
|
},
|
|
|
|
reparseBuffer: function() {
|
|
forEach(this.container.childNodes, function(node) {node.dirty = true;});
|
|
if (this.container.firstChild)
|
|
this.addDirtyNode(this.container.firstChild);
|
|
},
|
|
|
|
// Add a node to the set of dirty nodes, if it isn't already in
|
|
// there.
|
|
addDirtyNode: function(node) {
|
|
node = node || this.container.firstChild;
|
|
if (!node) return;
|
|
|
|
for (var i = 0; i < this.dirty.length; i++)
|
|
if (this.dirty[i] == node) return;
|
|
|
|
if (node.nodeType != 3)
|
|
node.dirty = true;
|
|
this.dirty.push(node);
|
|
},
|
|
|
|
// Cause a highlight pass to happen in options.passDelay
|
|
// milliseconds. Clear the existing timeout, if one exists. This
|
|
// way, the passes do not happen while the user is typing, and
|
|
// should as unobtrusive as possible.
|
|
scheduleHighlight: function() {
|
|
// Timeouts are routed through the parent window, because on
|
|
// some browsers designMode windows do not fire timeouts.
|
|
var self = this;
|
|
this.parent.clearTimeout(this.highlightTimeout);
|
|
this.highlightTimeout = this.parent.setTimeout(function(){self.highlightDirty();}, this.options.passDelay);
|
|
},
|
|
|
|
// Fetch one dirty node, and remove it from the dirty set.
|
|
getDirtyNode: function() {
|
|
while (this.dirty.length > 0) {
|
|
var found = this.dirty.pop();
|
|
// IE8 sometimes throws an unexplainable 'invalid argument'
|
|
// exception for found.parentNode
|
|
try {
|
|
// If the node has been coloured in the meantime, or is no
|
|
// longer in the document, it should not be returned.
|
|
while (found && found.parentNode != this.container)
|
|
found = found.parentNode
|
|
if (found && (found.dirty || found.nodeType == 3))
|
|
return found;
|
|
} catch (e) {}
|
|
}
|
|
return null;
|
|
},
|
|
|
|
// Pick dirty nodes, and highlight them, until options.passTime
|
|
// milliseconds have gone by. The highlight method will continue
|
|
// to next lines as long as it finds dirty nodes. It returns
|
|
// information about the place where it stopped. If there are
|
|
// dirty nodes left after this function has spent all its lines,
|
|
// it shedules another highlight to finish the job.
|
|
highlightDirty: function(force) {
|
|
// Prevent FF from raising an error when it is firing timeouts
|
|
// on a page that's no longer loaded.
|
|
if (!window.select) return;
|
|
|
|
if (!this.options.readOnly) select.markSelection(this.win);
|
|
var start, endTime = force ? null : time() + this.options.passTime;
|
|
while ((time() < endTime || force) && (start = this.getDirtyNode())) {
|
|
var result = this.highlight(start, endTime);
|
|
if (result && result.node && result.dirty)
|
|
this.addDirtyNode(result.node);
|
|
}
|
|
if (!this.options.readOnly) select.selectMarked();
|
|
if (start) this.scheduleHighlight();
|
|
return this.dirty.length == 0;
|
|
},
|
|
|
|
// Creates a function that, when called through a timeout, will
|
|
// continuously re-parse the document.
|
|
documentScanner: function(passTime) {
|
|
var self = this, pos = null;
|
|
return function() {
|
|
// FF timeout weirdness workaround.
|
|
if (!window.select) return;
|
|
// If the current node is no longer in the document... oh
|
|
// well, we start over.
|
|
if (pos && pos.parentNode != self.container)
|
|
pos = null;
|
|
select.markSelection(self.win);
|
|
var result = self.highlight(pos, time() + passTime, true);
|
|
select.selectMarked();
|
|
var newPos = result ? (result.node && result.node.nextSibling) : null;
|
|
pos = (pos == newPos) ? null : newPos;
|
|
self.delayScanning();
|
|
};
|
|
},
|
|
|
|
// Starts the continuous scanning process for this document after
|
|
// a given interval.
|
|
delayScanning: function() {
|
|
if (this.scanner) {
|
|
this.parent.clearTimeout(this.documentScan);
|
|
this.documentScan = this.parent.setTimeout(this.scanner, this.options.continuousScanning);
|
|
}
|
|
},
|
|
|
|
// The function that does the actual highlighting/colouring (with
|
|
// help from the parser and the DOM normalizer). Its interface is
|
|
// rather overcomplicated, because it is used in different
|
|
// situations: ensuring that a certain line is highlighted, or
|
|
// highlighting up to X milliseconds starting from a certain
|
|
// point. The 'from' argument gives the node at which it should
|
|
// start. If this is null, it will start at the beginning of the
|
|
// document. When a timestamp is given with the 'target' argument,
|
|
// it will stop highlighting at that time. If this argument holds
|
|
// a DOM node, it will highlight until it reaches that node. If at
|
|
// any time it comes across two 'clean' lines (no dirty nodes), it
|
|
// will stop, except when 'cleanLines' is true. maxBacktrack is
|
|
// the maximum number of lines to backtrack to find an existing
|
|
// parser instance. This is used to give up in situations where a
|
|
// highlight would take too long and freeze the browser interface.
|
|
highlight: function(from, target, cleanLines, maxBacktrack){
|
|
var container = this.container, self = this, active = this.options.activeTokens;
|
|
var endTime = (typeof target == "number" ? target : null);
|
|
|
|
if (!container.firstChild)
|
|
return;
|
|
// Backtrack to the first node before from that has a partial
|
|
// parse stored.
|
|
while (from && (!from.parserFromHere || from.dirty)) {
|
|
if (maxBacktrack != null && from.nodeName == "BR" && (--maxBacktrack) < 0)
|
|
return false;
|
|
from = from.previousSibling;
|
|
}
|
|
// If we are at the end of the document, do nothing.
|
|
if (from && !from.nextSibling)
|
|
return;
|
|
|
|
// Check whether a part (<span> node) and the corresponding token
|
|
// match.
|
|
function correctPart(token, part){
|
|
return !part.reduced && part.currentText == token.value && part.className == token.style;
|
|
}
|
|
// Shorten the text associated with a part by chopping off
|
|
// characters from the front. Note that only the currentText
|
|
// property gets changed. For efficiency reasons, we leave the
|
|
// nodeValue alone -- we set the reduced flag to indicate that
|
|
// this part must be replaced.
|
|
function shortenPart(part, minus){
|
|
part.currentText = part.currentText.substring(minus);
|
|
part.reduced = true;
|
|
}
|
|
// Create a part corresponding to a given token.
|
|
function tokenPart(token){
|
|
var part = makePartSpan(token.value, self.doc);
|
|
part.className = token.style;
|
|
return part;
|
|
}
|
|
|
|
function maybeTouch(node) {
|
|
if (node) {
|
|
var old = node.oldNextSibling;
|
|
if (lineDirty || old === undefined || node.nextSibling != old)
|
|
self.history.touch(node);
|
|
node.oldNextSibling = node.nextSibling;
|
|
}
|
|
else {
|
|
var old = self.container.oldFirstChild;
|
|
if (lineDirty || old === undefined || self.container.firstChild != old)
|
|
self.history.touch(null);
|
|
self.container.oldFirstChild = self.container.firstChild;
|
|
}
|
|
}
|
|
|
|
// Get the token stream. If from is null, we start with a new
|
|
// parser from the start of the frame, otherwise a partial parse
|
|
// is resumed.
|
|
var traversal = traverseDOM(from ? from.nextSibling : container.firstChild),
|
|
stream = stringStream(traversal),
|
|
parsed = from ? from.parserFromHere(stream) : Editor.Parser.make(stream);
|
|
|
|
// parts is an interface to make it possible to 'delay' fetching
|
|
// the next DOM node until we are completely done with the one
|
|
// before it. This is necessary because often the next node is
|
|
// not yet available when we want to proceed past the current
|
|
// one.
|
|
var parts = {
|
|
current: null,
|
|
// Fetch current node.
|
|
get: function(){
|
|
if (!this.current)
|
|
this.current = traversal.nodes.shift();
|
|
return this.current;
|
|
},
|
|
// Advance to the next part (do not fetch it yet).
|
|
next: function(){
|
|
this.current = null;
|
|
},
|
|
// Remove the current part from the DOM tree, and move to the
|
|
// next.
|
|
remove: function(){
|
|
container.removeChild(this.get());
|
|
this.current = null;
|
|
},
|
|
// Advance to the next part that is not empty, discarding empty
|
|
// parts.
|
|
getNonEmpty: function(){
|
|
var part = this.get();
|
|
// Allow empty nodes when they are alone on a line, needed
|
|
// for the FF cursor bug workaround (see select.js,
|
|
// insertNewlineAtCursor).
|
|
while (part && part.nodeName == "SPAN" && part.currentText == "") {
|
|
var old = part;
|
|
this.remove();
|
|
part = this.get();
|
|
// Adjust selection information, if any. See select.js for details.
|
|
select.snapshotMove(old.firstChild, part && (part.firstChild || part), 0);
|
|
}
|
|
return part;
|
|
}
|
|
};
|
|
|
|
var lineDirty = false, prevLineDirty = true, lineNodes = 0;
|
|
|
|
// This forEach loops over the tokens from the parsed stream, and
|
|
// at the same time uses the parts object to proceed through the
|
|
// corresponding DOM nodes.
|
|
forEach(parsed, function(token){
|
|
var part = parts.getNonEmpty();
|
|
|
|
if (token.value == "\n"){
|
|
// The idea of the two streams actually staying synchronized
|
|
// is such a long shot that we explicitly check.
|
|
if (part.nodeName != "BR")
|
|
throw "Parser out of sync. Expected BR.";
|
|
|
|
if (part.dirty || !part.indentation) lineDirty = true;
|
|
maybeTouch(from);
|
|
from = part;
|
|
|
|
// Every <br> gets a copy of the parser state and a lexical
|
|
// context assigned to it. The first is used to be able to
|
|
// later resume parsing from this point, the second is used
|
|
// for indentation.
|
|
part.parserFromHere = parsed.copy();
|
|
part.indentation = token.indentation;
|
|
part.dirty = false;
|
|
|
|
// If the target argument wasn't an integer, go at least
|
|
// until that node.
|
|
if (endTime == null && part == target) throw StopIteration;
|
|
|
|
// A clean line with more than one node means we are done.
|
|
// Throwing a StopIteration is the way to break out of a
|
|
// MochiKit forEach loop.
|
|
if ((endTime != null && time() >= endTime) || (!lineDirty && !prevLineDirty && lineNodes > 1 && !cleanLines))
|
|
throw StopIteration;
|
|
prevLineDirty = lineDirty; lineDirty = false; lineNodes = 0;
|
|
parts.next();
|
|
}
|
|
else {
|
|
if (part.nodeName != "SPAN")
|
|
throw "Parser out of sync. Expected SPAN.";
|
|
if (part.dirty)
|
|
lineDirty = true;
|
|
lineNodes++;
|
|
|
|
// If the part matches the token, we can leave it alone.
|
|
if (correctPart(token, part)){
|
|
part.dirty = false;
|
|
parts.next();
|
|
}
|
|
// Otherwise, we have to fix it.
|
|
else {
|
|
lineDirty = true;
|
|
// Insert the correct part.
|
|
var newPart = tokenPart(token);
|
|
container.insertBefore(newPart, part);
|
|
if (active) active(newPart, token, self);
|
|
var tokensize = token.value.length;
|
|
var offset = 0;
|
|
// Eat up parts until the text for this token has been
|
|
// removed, adjusting the stored selection info (see
|
|
// select.js) in the process.
|
|
while (tokensize > 0) {
|
|
part = parts.get();
|
|
var partsize = part.currentText.length;
|
|
select.snapshotReplaceNode(part.firstChild, newPart.firstChild, tokensize, offset);
|
|
if (partsize > tokensize){
|
|
shortenPart(part, tokensize);
|
|
tokensize = 0;
|
|
}
|
|
else {
|
|
tokensize -= partsize;
|
|
offset += partsize;
|
|
parts.remove();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
});
|
|
maybeTouch(from);
|
|
webkitLastLineHack(this.container);
|
|
|
|
// The function returns some status information that is used by
|
|
// hightlightDirty to determine whether and where it has to
|
|
// continue.
|
|
return {node: parts.getNonEmpty(),
|
|
dirty: lineDirty};
|
|
}
|
|
};
|
|
|
|
return Editor;
|
|
})();
|
|
|
|
addEventHandler(window, "load", function() {
|
|
var CodeMirror = window.frameElement.CodeMirror;
|
|
CodeMirror.editor = new Editor(CodeMirror.options);
|
|
this.parent.setTimeout(method(CodeMirror, "init"), 0);
|
|
});
|