var ResizeIframe = {
    wrapperId: "tinc_content",

    /**
    * Resizes an iframe sId including oDoc to oDoc's content size.
    * Can be called top-down, i.e. from the including iframe (or it's parents) or bottom-up, i.e. from the included document.
    * In the latter case the iframe element is retrieved programmatically.
    * 
    * @param oDoc  Included page's document object
    * @param sId   ID of including iframe
    */
    resize: function(oDoc, sId) {
        try {
            if (typeof oDoc == "undefined") return;

            if (typeof sId != "undefined") {
                var iframe = oDoc.getElementById(sId);
                var iframeDoc = iframe.contentWindow.document;
            } else {
                var iframeDoc = oDoc;
                var iframeWindow = iframeDoc.parentWindow || iframeDoc.defaultView;
                var iframe = iframeWindow.frameElement;
            }
            var wrapper = iframeDoc.getElementById(this.wrapperId);

            // make sure we only resize once
            if (iframeDoc.isIntegrated == true) { return; }

            // switch on transparency for iframe
            iframeDoc.body.style.backgroundColor = "transparent";
            iframe.allowTransparency = "true";

            iframeDoc.body.style.padding = "0px";
            iframeDoc.body.style.border = "none";

            var tabs = iframeDoc.getElementsByTagName("table")
            if (tabs[0] && tabs[0].className == "dborder") {
                wrapper.setAttribute("wfx:overridewidth", "true");
            } else if (iframeDoc.forms[0] && iframeDoc.forms[0].elements["formname"]) {
                wrapper.setAttribute("wfx:overridewidth", "true");
            }

            if (window.addEventListener) {
                var gcs = iframeDoc.defaultView.getComputedStyle(iframeDoc.body, null);
                var v_margin = parseInt(gcs.getPropertyValue("margin-top")) + parseInt(gcs.getPropertyValue("margin-bottom"));
                var h_margin = parseInt(gcs.getPropertyValue("margin-left")) + parseInt(gcs.getPropertyValue("margin-right"));
                var wrapper_width = wrapper.offsetWidth;

                var flex = wrapper.getAttribute("wfx:overridewidth");
                if (flex == "true") {
                    wrapper.style.width = "100%";
                } else {
                    iframe.style.width = wrapper_width + h_margin + "px";
                }

                // Setting the top padding of the wrapper avoids wrong calculation of the height due to collapsing margins behavior
                wrapper.style.paddingTop = "1px";

                height = wrapper.offsetHeight + v_margin;
            }
            else if (window.attachEvent) {
                iframeDoc.body.style.margin = "0px";
                var wrapper_width = wrapper.offsetWidth;

                var flex = wrapper.getAttribute("wfx:overridewidth");
                if (flex == "true") {
                    wrapper.style.width = "100%";
                } else {
                    // We need to add this extra 20 pixel for some modules. Otherwise the width would not be big enough and we would get scrollbars.
                    // REMARK: In the script which is used for resizing the modules inside the editor we don't need this!
                    // Currently I don't know the reason for this difference!?
                    iframe.style.width = wrapper_width + 20 + "px";
                }

                height = wrapper.offsetHeight;
            }

            if (iframe.scrolling != "yes") { height += 20; }

            iframe.style.height = height + "px";
            iframeDoc.isIntegrated = true;
        } catch (ex) {
            return;
        }

        WfxExtrasProcessor.process(oDoc, sId);
    }
}

var WfxExtrasProcessor = {
    process: function(oDoc, sId) {
        if (typeof oDoc == "undefined") return;

        if (typeof sId != "undefined") {
            var iframe = oDoc.getElementById(sId);
            var iframeDoc = iframe.contentWindow.document;
        } else {
            var iframeDoc = oDoc;
            var iframeWindow = iframeDoc.parentWindow || iframeDoc.defaultView;
            var iframe = iframeWindow.frameElement;
        }

        // let non-tinc links load in the parent document. this might need some adjustment
        var links = iframeDoc.getElementsByTagName("a");
        for (var i = 0; i < links.length; i++) {
            if (links[i].href.indexOf("/tinc") == -1) links[i].target = "_parent";
        }

        // Special case: WebElements forms might do redirection to another page after submission. That's indicated by a non-empty
        // 'redirectionEnabled' attribute of a submit button. 
        var inputs = iframeDoc.getElementsByTagName("input");
        for (var i = 0; i < inputs.length; i++) {
            var input = inputs[i];
            if (input.getAttribute("redirection") != null && input.getAttribute("redirection") != '')
                input.form.target = "_parent";
        }
    }
}