// ==UserScript==
// @name           Dinakaran Epaper Fix
// @namespace      http://saravan.blogspot.com
// @description    Fixes Dinakaran, Tamil Murasu epaper in Firefox and adds other useful options.
// @include        http://www.dinakaran.com/*
// @include        http://epaper.tamilmurasu.in/*
// @include        http://www.dinakaran.co.in/epaperdinakaran/*
// @include        http://www.dinakaran.co.in/epapertamilmurasu/*
// @include        http://*.dinakaran.co.in/*
// @exclude        http://www.dinakaran.com/epaper/*leftmenu*
// @exclude        http://epaper.tamilmurasu.in/*leftmenu*
// ==/UserScript==

/*********************************************************************
* Dinakaran Epaper Fix
*  - Fixes Dinakaran, Tamil Murasu epaper in Firefox.
*  - Adds other useful options.
* Copyright (C) 2008, Saravana Kumar <saravanannkl@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301  USA
*********************************************************************/

var urlIndex = -1;
urlIndex = document.baseURI.lastIndexOf('/');
var urlInitialPart = document.baseURI.substring(0, urlIndex+1);

function fillSingleDigit(no) { 
    var fill = ""; 
    if(no<10) { fill = "0"; } 
    return fill + no;  
}

function createUrl(id, winName) {
    newUrl ="showxml.aspx?id=" +id + "&code="+ winName;
    return urlInitialPart + newUrl;
}

// string replace is not replacing all the patterns in the string. Not in a mood to debug.
function remove(str, pat) {
    var newStr = str;
    for(var i=0; i<50; i++) {
        newStr = str.replace(pat, '');
        if(newStr.length == str.length) return str;
        str = newStr;
    }
    return newStr;
}

/* Create dummy functions for the DHTML crap. */
function createDummyFunctions() {
    unsafeWindow.borderit = function (which,color) { }
    unsafeWindow.show_pop = function (id,winName,divn,imgpathd) {
        var x = window.scrollX;
        var y = window.scrollY;
        GM_openInTab(createUrl(id, winName));
        window.setTimeout(function () { window.scrollTo(x, y); }, 1);
    }
}

// Assigns keyboard shortcuts j,k to move to next and prev pages.
function addKeyboardShortcuts() {
    var filterDiv = document.getElementById('oFilterDIV');
    if(!filterDiv) return;
        
    filterDiv.parentNode.removeChild(filterDiv);

    var allPageLinks = document.evaluate("//a[contains(@href, 'DataGrid')]", document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
    var pageCount = allPageLinks.snapshotLength;
    if(pageCount<2) return;

    var prevLink, nextLink;

    var firstPageLink = allPageLinks.snapshotItem(0);
    var lastPageLink = allPageLinks.snapshotItem(pageCount-1);

    var currPageLink, iPageIndx;
    for(iPageIndx=0; iPageIndx<pageCount; iPageIndx++) {
	    var tmpPageLink = allPageLinks.snapshotItem(iPageIndx);
	    if(window.getComputedStyle(tmpPageLink.firstChild, '').color!="rgb(0, 0, 0)") {
		    currPageLink = tmpPageLink;
		    break;
	    }
    }
    
    if(currPageLink == firstPageLink) {
	    prevLink = lastPageLink;
	    nextLink = allPageLinks.snapshotItem(1);
    }
    else if(currPageLink == lastPageLink) {
	    prevLink = allPageLinks.snapshotItem(pageCount-2);
	    nextLink = firstPageLink;
    }
    else {
	    if(currPageLink) {
		    prevLink = allPageLinks.snapshotItem(iPageIndx-1);
		    nextLink = allPageLinks.snapshotItem(iPageIndx+1);
	    }
    }

    document.addEventListener('keypress', 
		        function (e) {
			        try {
				        var sPressedKey = String.fromCharCode(e.which).toUpperCase();
				        switch(sPressedKey) {
					        case 'K':
						        if(prevLink)
							        window.setTimeout(prevLink.href, 1);
						        break;
					        case 'J':
						        if(nextLink)
							        window.setTimeout(nextLink.href, 1);
						        break;
				        }

			        }
			        catch(e) {
				        GM_log('Exception in keyhandler: ' + e.toString());
			        }
		        }
		        , true);
}

// Replaces JS links with complete http link. Currently disabled. But changes JS links to open pages in new tab.
function replaceJSLinks() {
    var allAreas = document.getElementsByTagName('area');

    for(var i=allAreas.length-1; i>=0; i--) {
        var elmArea = allAreas[i];
        var areaClick = elmArea.getAttribute('onclick');
        if(!areaClick) continue;

         var areaClick = remove(areaClick, 'show_pop');
        areaClick = remove(areaClick, '(');
        areaClick = remove(areaClick, ')');
        areaClick = remove(areaClick, ' ');
        areaClick = remove(areaClick, '\'');
        areaClick = remove(areaClick, "'");
        var allParams = areaClick.split(',');

        if(allParams.length<2) continue;

        var newUrl = createUrl(allParams[0], allParams[1]);

        elmArea.setAttribute('onMouseOver', "window.status='" + newUrl + "'; return true;");
        elmArea.setAttribute('onMouseOut', "window.status=''; return true;");
        //elmArea.setAttribute('href', newUrl);
        //elmArea.removeAttribute('onclick');
    }
}


/* Change the font name to Vikatan_TAM so that Padma can transform automatically. Not sure it works. */
function changeFont() {
	var tags = document.getElementsByTagName('*');
	for(var i=0; i<tags.length; i++) {
		var objStyle = window.getComputedStyle(tags[i], '');
		if(objStyle.fontFamily.toLowerCase() == 'b095_tamelango_valluvan' || objStyle.fontFamily.toLowerCase() == 'b096_tamelango_valluvan bold')
			tags[i].style.fontFamily = 'Vikatan_TAM';
	}
}


/* Create a link to open the images of the individual pages. */
function addLinkForAllPages() {
    if(window.location.pathname.indexOf('showxml.aspx') == -1) {
	    var a = document.createElement("a");
        a.innerHTML = "Open All Pages";
        a.href="#";
        a.addEventListener("click", function() {
                var imgUrl = document.getElementById('Image1').src
                var imgUrlPrefix = imgUrl.substring(0, imgUrl.length-12);
                if(window.location.host == 'dkn.dinakaran.co.in') {
                    for(var i=1;i<=14;i++) {
                        GM_openInTab(imgUrlPrefix + "1_" + fillSingleDigit(i) + "_cni.jpg");
                    }
                    for(var i=15;i<=18;i++) {
                        GM_openInTab(imgUrlPrefix + "6_" + fillSingleDigit(i) + "_cni.jpg");
                    }
                }
                else {
                    for(var i=1;i<=8;i++) {
                        GM_openInTab(imgUrlPrefix + "1_" + fillSingleDigit(i) + "_cni.jpg");
                    }
                }
            }, false);

        var Imagetable = document.getElementById("Imagetable");
        Imagetable.parentNode.insertBefore(a, Imagetable);
    }
}



function main() {
    createDummyFunctions();
    addLinkForAllPages();
    addKeyboardShortcuts();
    replaceJSLinks();
    changeFont();
}

main();