kupuhelpers.js

一个使用struts+hibernate+spring开发的完的网站源代码。

            if (selectAfterPlace) {
                // see MozillaSelection.replaceWithNode() for some comments about
                // selectAfterPlace
                var temprange = this.document.getDocument().body.createTextRange();
                if (selectAfterPlace.nodeType == 1) {
                    temprange.moveToElementText(selectAfterPlace);
                } else {
                    temprange.moveToElementText(newnode);
                };
                //temprange.moveEnd('character', -1);
                temprange.select();
            };
        };

        this.selection = this.document.getDocument().selection;

        return newnode;
    };

    this.startOffset = function() {
        var startoffset = 0;
        var selrange = this.selection.createRange();
        var parent = selrange.parentElement();
        var elrange = selrange.duplicate();
        elrange.moveToElementText(parent);
        var tempstart = selrange.duplicate();
        while (elrange.compareEndPoints('StartToStart', tempstart) < 0) {
            startoffset++;
            tempstart.moveStart('character', -1);
        };

        return startoffset;
    };

    this.endOffset = function() {
        var endoffset = 0;
        var selrange = this.selection.createRange();
        var parent = selrange.parentElement();
        var elrange = selrange.duplicate();
        elrange.moveToElementText(parent);
        var tempend = selrange.duplicate();
        while (elrange.compareEndPoints('EndToEnd', tempend) > 0) {
            endoffset++;
            tempend.moveEnd('character', 1);
        };

        return endoffset;
    };

    this.getContentLength = function() {
        var contentlength = 0;
        var range = this.selection.createRange().duplicate();
        var startpoint = range.duplicate();
        startpoint.collapse();
        var endpoint = range.duplicate();
        endpoint.collapse(false);
        while (!startpoint.isEqual(endpoint)) {
            startpoint.moveEnd('character', 1);
            startpoint.moveStart('character', 1);
            contentlength++;
        };
        return contentlength;
    };

    this.cutChunk = function(startOffset, endOffset) {
        /* cut a chunk of HTML from the selection

            this *should* return the chunk of HTML but doesn't yet
        */
        var range = this.selection.createRange().duplicate();
        range.moveStart('character', startOffset);
        range.moveEnd('character', -endOffset);
        range.pasteHTML('');
        // XXX here it should return the chunk
    };

    this.getElementLength = function(element) {
        /* returns the length of an element *including* 1 char for each child element

            this is defined on the selection since it returns results that can be used
            to work with selection offsets
        */
        var length = 0;
        var range = this.selection.createRange().duplicate();
        range.moveToElementText(element);
        range.moveStart('character', 1);
        range.moveEnd('character', -1);
        var endpoint = range.duplicate();
        endpoint.collapse(false);
        range.collapse();
        while (!range.isEqual(endpoint)) {
            range.moveEnd('character', 1);
            range.moveStart('character', 1);
            length++;
        };
        return length;
    };

    this.parentElement = function() {
        /* return the selected node (or the node containing the selection) */
        // XXX this should be on a range object
        if (this.selection.type == 'Control') {
            return this.selection.createRange().item(0);
        } else {
            return this.selection.createRange().parentElement();
        };
    };

    // deprecated alias of parentElement
    this.getSelectedNode = this.parentElement;

    this.moveStart = function(offset) {
        /* move the start of the selection */
        var range = this.selection.createRange();
        range.moveStart('character', offset);
        range.select();
    };

    this.moveEnd = function(offset) {
        /* moves the end of the selection */
        var range = this.selection.createRange();
        range.moveEnd('character', offset);
        range.select();
    };

    this.reset = function() {
       this.selection = this.document.getDocument().selection;
    };

    this.cloneContents = function() {
        /* returns a document fragment with a copy of the contents */
        var contents = this.selection.createRange().htmlText;
        var doc = this.document.getDocument();
        var docfrag = doc.createElement('span');
        docfrag.innerHTML = contents;
        return docfrag;
    };

    this.containsNode = function(node) {
        var selected = this.selection.createRange();
        
        if (this.selection.type.toLowerCase()=='text') {
            var range = doc.body.createTextRange();
            range.moveToElementText(node);

            if (selected.compareEndPoints('StartToEnd', range) >= 0 ||
                selected.compareEndPoints('EndToStart', range) <= 0) {
                return false;
            }
            return true;
        } else {
            for (var i = 0; i < selected.length; i++) {
                if (selected.item(i).contains(node)) {
                    return true;
                }
            }
            return false;
        }
    };
    
    this.toString = function() {
        return this.selection.createRange().htmlText;
    };
};

IESelection.prototype = new BaseSelection;

/* ContextFixer, fixes a problem with the prototype based model

    When a method is called in certain particular ways, for instance
    when it is used as an event handler, the context for the method
    is changed, so 'this' inside the method doesn't refer to the object
    on which the method is defined (or to which it is attached), but for
    instance to the element on which the method was bound to as an event
    handler. This class can be used to wrap such a method, the wrapper 
    has one method that can be used as the event handler instead. The
    constructor expects at least 2 arguments, first is a reference to the
    method, second the context (a reference to the object) and optionally
    it can cope with extra arguments, they will be passed to the method
    as arguments when it is called (which is a nice bonus of using 
    this wrapper).
*/

function ContextFixer(func, context) {
    /* Make sure 'this' inside a method points to its class */
    this.func = func;
    this.context = context;
    this.args = arguments;
    var self = this;
    
    this.execute = function() {
        /* execute the method */
        var args = new Array();
        // the first arguments will be the extra ones of the class
        for (var i=0; i < self.args.length - 2; i++) {
            args.push(self.args[i + 2]);
        };
        // the last are the ones passed on to the execute method
        for (var i=0; i < arguments.length; i++) {
            args.push(arguments[i]);
        };
        self.func.apply(self.context, args);
    };
};

/* Alternative implementation of window.setTimeout

    This is a singleton class, the name of the single instance of the
    object is 'timer_instance', which has one public method called
    registerFunction. This method takes at least 2 arguments: a
    reference to the function (or method) to be called and the timeout.
    Arguments to the function are optional arguments to the 
    registerFunction method. Example:

    timer_instance.registerMethod(foo, 100, 'bar', 'baz');

    will call the function 'foo' with the arguments 'bar' and 'baz' with
    a timeout of 100 milliseconds.

    Since the method doesn't expect a string but a reference to a function
    and since it can handle arguments that are resolved within the current
    namespace rather then in the global namespace, the method can be used
    to call methods on objects from within the object (so this.foo calls
    this.foo instead of failing to find this inside the global namespace)
    and since the arguments aren't strings which are resolved in the global
    namespace the arguments work as expected even inside objects.

*/

function Timer() {
    /* class that has a method to replace window.setTimeout */
    this.lastid = 0;
    this.functions = {};
    
    this.registerFunction = function(object, func, timeout) {
        /* register a function to be called with a timeout

            args: 
                func - the function
                timeout - timeout in millisecs
                
            all other args will be passed 1:1 to the function when called
        */
        var args = new Array();
        for (var i=0; i < arguments.length - 3; i++) {
            args.push(arguments[i + 3]);
        }
        var id = this._createUniqueId();
        this.functions[id] = new Array(object, func, args);
        setTimeout("timer_instance._handleFunction(" + id + ")", timeout);
    };

    this._handleFunction = function(id) {
        /* private method that does the actual function call */
        var obj = this.functions[id][0];
        var func = this.functions[id][1];
        var args = this.functions[id][2];
        this.functions[id] = null;
        func.apply(obj, args);
    };

    this._createUniqueId = function() {
        /* create a unique id to store the function by */
        while (this.lastid in this.functions && this.functions[this.lastid]) {
            this.lastid++;
            if (this.lastid > 100000) {
                this.lastid = 0;
            }
        }
        return this.lastid;
    };
};

// create a timer instance in the global namespace, obviously this does some
// polluting but I guess it's impossible to avoid...

// OBVIOUSLY THIS VARIABLE SHOULD NEVER BE OVERWRITTEN!!!
timer_instance = new Timer();

// helper function on the Array object to test for containment
Array.prototype.contains = function(element, objectequality) {
    /* see if some value is in this */
    for (var i=0; i < this.length; i++) {
        if (objectequality) {
            if (element === this[i]) {
                return true;
            };
        } else {
            if (element == this[i]) {
                return true;
            };
        };
    };
    return false;
};

// JavaScript has a friggin' blink() function, but not for string stripping...
String.prototype.strip = function() {
    var stripspace = /^\s*([\s\S]*?)\s*$/;
    return stripspace.exec(this)[1];
};

//----------------------------------------------------------------------------
// Exceptions
//----------------------------------------------------------------------------

// XXX don't know if this is the regular way to define exceptions in JavaScript?
function Exception() {
    return;
};

// throw this as an exception inside an updateState handler to restart the
// update, may be required in situations where updateState changes the structure
// of the document (e.g. does a cleanup or so)
UpdateStateCancelBubble = new Exception();