74 lines
2.4 KiB
JavaScript
74 lines
2.4 KiB
JavaScript
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function readFile(name) {
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var r
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new Ajax.Request("projects/" + name + ".txt", {
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method: "get",
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asynchronous: false,
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onSuccess: function(transport) { r = transport.responseText },
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onFailure: function(transport) { r = "" },
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onException: function(x) { console.log(x) }
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})
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return r
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}
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function writeFile(name, text) {
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var ok = true
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new Ajax.Request("projects/" + name + ".txt", {
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method: "put",
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asynchronous: false,
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postBody: text,
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onFailure: function() { ok = false }
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})
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if (!ok)
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throw "unable to write file '" + name + "'"
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}
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function projectIsDirty() { return $('workspaceForm').source.value != $('workspaceForm').source.origValue }
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dirtyAreYouSureMessage = "The changes you have made to this project will be lost unless you press 'cancel' " +
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"and save your work. Proceed?"
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window.onbeforeunload = function() { if (projectIsDirty()) return dirtyAreYouSureMessage }
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function loadProject() {
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if (arguments.length > 0) {
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if (arguments[0] == "" || "#" + arguments[0] == document.location.hash)
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return
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document.location.hash = hashChangedHandler.oldHash = "#" + arguments[0]
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}
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if (projectIsDirty() && !confirm(dirtyAreYouSureMessage))
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return
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var projName = document.location.hash.substring(1),
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projData = readFile(projName)
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$('workspaceForm').source.value = projData
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$('workspaceForm').source.origValue = projData
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$('title').innerHTML = "<font color=#000088>" + projName.replace(/_/g, " ") + "</font>" + titleRest
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}
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function saveProject() {
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try {
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var projName = document.location.hash.substring(1),
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projData = $('workspaceForm').source.value
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// the following is an ugly hack to fix a bug in prototype.js
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if (projData == "")
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projData = " "
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writeFile(projName, projData)
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$('workspaceForm').source.origValue = projData
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alert("Project '" + projName + "' saved")
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}
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catch (e) {
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alert("Error: " + e + "\n" +
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"Please save your work locally (by cutting and pasting),\n" +
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"and let Alex know about this problem.")
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throw e
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}
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}
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hashChangedHandler = function() {
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if (document.location.hash == hashChangedHandler.oldHash)
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return
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hashChangedHandler.oldHash = document.location.hash
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loadProject()
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}
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hashChangedHandler.oldHash = document.location.hash
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hashChangedHandler.intervalId = setInterval(hashChangedHandler, 1000)
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