{% extends "silpa.html" %}
{% block modulescript %}
<script type="text/javascript">
    $("document").ready(function(){
        $("#wiki2pdfform").submit(function(event)
        {
            event.preventDefault();
            renderpdf(this);
        });
        $("#rendertext").submit(function(event)
        {
            event.preventDefault();
            rendercontent(this);
        });
    });

    function rendercontent(form)
    {
        var progress = $('#renderprogress'),
            error = $('#rendererror'),
            result = $('#renderresult'),
            type = $('#format').val(),
            jsonRequest = {
                "method" :  "scriptrender.render_text",
                "params" : [
                    form.text.value,
                    type,
                    form.width.value,
                    form.height.value,
                    $('#fontcolor').val()
                 ],
                "id" : ""
            };

        $.ajax({
            type: "POST",
            contentType: "application/json; charset=utf-8",
            url: "JSONRPC",
            data: JSON.stringify(jsonRequest),
            dataType: "json",
            beforeSend:function(){
                progress.show().html("Rendering...please wait.");
                result.empty();
                error.empty();
            },
            success: function(msg) {
                progress.hide();
                var resultobj =  msg.result;
                if (type=="png") {
                    resulthtml="<img class='img-polaroid' src='/static/output/"+ resultobj+"' style='border:solid;border-width:2px;' />";
                } else {
                    resulthtml= "<a class='btn' href='/static/output/" + resultobj+"' target='_new'>Open or Download " + type +"</a>";
                }
                result.show().html(resulthtml);
            },
            error: function(msg) {
                error.show().html("Something went wrong...")
            }
        });
    };

    function renderpdf(form){
        var progress = $('#pdfprogress'),
            error = $('#pdferror'),
            result = $('#pdfresult');

        $.ajax({
            type: "POST",
            contentType: "application/json; charset=utf-8",
            url: "JSONRPC",
            data: JSON.stringify({
                "method" :  "scriptrender.wiki2pdf",
                "params" : [form.wikiurl.value],
                "id" : ""
            }),
            dataType: "json",
            beforeSend: function(){
                error.hide()
                result.hide();
                progress.html("Please wait...").show();
            },
            success: function(msg) {
                progress.hide();
                var resulthtml= "<a href= '/static/output/" + msg.result + "' target='_new'>Open or Download PDF</a>";
                result.show().html(resulthtml);
            },
            error: function(msg) {
                progress.hide();
                error.show().html("An Error occured!");
            }
        });
    };
</script>
{% endblock %}

{% block content %}
<div class="">

        <legend>Script Renderer </legend></hr>
        <p>This is an <b>experimental</b> online service based on
         <a href="https://savannah.nongnu.org/projects/pypdflib">PyPDFLib library</a> in development. This library projects objective is to develop an opensource
         pdf rendering library which can support all complex scripts. It is in development and this service is <b>not bug-free</b> now.</p>
        <h3>Generate PDF of a wiki page</h3>
        <form id="wiki2pdfform">
            <div class="control-group">
               <label> Wiki URL: </label><input type="text" name="wikiurl" value="http://ml.wikipedia.org/wiki/Mango"  style="width:30em;" id="wikiurl"/>
                <div class="control">
                    <input  type="submit" class="btn btn-primary" id="Render" value="Convert to PDF"  name="action" style="width:10em;"/>
                </div>
            </div>
            <div id="pdfprogress" class="alert alert-info hide"></div>
            <div id="pdfresult" class="alert hide"></div>
            <div id="pdferror" class="alert alert-error hide"></div>
        </form>

        <legend>Convert Text to Image</legend>
        <form class="form-inline" id="rendertext">
        <div class="control-group">
            <div class="control">
                <textarea class="span12" rows="10"name='text' id='id1'></textarea>
            </div>
             <div class="control">
                 <label>Width:</label> <input type="text" class="input-small"  name="width" value="600" style="width:5em;"/>
             </div>
             <div class="control">
                 <label>Height:</label> <input type="text" class="input-small"  name="height" value="400" style="width:5em;"/>
             </div>
             <div class="control">
                 <label>Font Size:</label> <input type="text"  name="fontsize"  id="fontsize" value="10" style="width:5em;"/>
             </div>
             <div class="control">
                 <label>Font Color:</label> <select id="fontcolor" name="fontcolor">
                     <option value="Black">Black</option>
                     <option value="Blue">Blue</option>
                     <option value="Red">Red</option>
                     <option value="Yellow">Yellow</option>
                     <option value="Green">Green</option>
                 </select>
             </div>
             <div class="control">
                 <label>Output Format:</label> <select id="format" name="format">
                     <option value="png">PNG Image</option>
                     <option value="svg">SVG Image</option>
                     <option value="pdf">PDF</option>
                     </select>
             </div>
             <p>Note: Give height or width as 0 for auto sizing the output.</p>
             <p align=center>
                <div class="control">
                    <input  type="submit" class="btn btn-primary" id="Render" value="Render"  name="action" style="width:5em;"/>
                </div>
             </p>
             </br>
        </div>
        </form>
            <div id="renderprogress" class="alert alert-info hide"></div>
            <div id="renderresult" class="hide"></div>
            <div id="rendererror" class="alert alert-error hide"></div>
        <div id="documentation">
        <h3>Module Information</h2>
        This module uses pango cairo python apis for rendering. To get this running , you should have python bindings of pango and cairo installed in your system.
        For PDF generation, the module uses PyPDFLib library. This module is in development and APIs are not stable or final.
        <h3>Bugs? Suggestions? Let us know!</h3>
        If you see any bug in this application or you have any suggestion for improvement, just mail to <a href="mailto:pypdflib-dev@nongnu.org">pypdflib-dev@nongnu.org</a> with details. You can also report the  bug at <a href="https://savannah.nongnu.org/bugs/?group=pypdflib">PyPDFLib bug tracker</a>
        <h3>Python API</h2>
        <p>You can use Silpa python APIs to renedr a custom text to any image format or PDF. After installing silpa, refer the following example for using the api.
        The text can be in any script, including Right to Left scripts.
        </p>
        <pre class="code">
        from silpa.modules import render
        render=render.getInstance()
        #Render the text to SVG format. width=100, height= 200 pixels
        render.render_text("Your text goes here", "svg", 100,200)
        #Render the text to png format. width=100, height will be automatcally set based the content size
        render.render_text("Your text goes here", "png", 100 ,0)
        # Render the text to a PDF
        render.render_text("Your text goes here", "pdf", 500 , 500)
        </pre>
        
        <p>The render_text method return the name of the generated image.(TODO: Make the path of the image configurable)</p>
        <h3>Python JSON RPC</h2>
        <p>You will require JSON RPC client from here: http://json-rpc.org/wiki/python-json-rpc</p>
        <pre>
        from jsonrpc import ServiceProxy
        proxy = ServiceProxy("http://localhost/silpa/JSONRPC")
        print s.modules.Render.render_text("Your text goes here", "svg", 100,200)
        </pre>
        <h3>PHP JSON RPC</h2>
        <p>A sample PHP client to use the Silpa's JSON RPC service is given below.</p>
           <pre class="code">

        define ('HOSTNAME', 'http://silpa.smc.org.in/JSONRPC');
        $url = HOSTNAME;
        // Open the Curl session
        $session = curl_init($url);
        // If it's a POST, put the POST data in the body
        $postvars = '{"method": "modules.Render.render_text", "params": ["Your text goes here", "png", 100,100], "id":"jsonrpc"}';
        curl_setopt ($session, CURLOPT_POST, true);
        curl_setopt ($session, CURLOPT_POSTFIELDS, $postvars);
        // Don't return HTTP headers. Do return the contents of the call
        curl_setopt($session, CURLOPT_HEADER, false);
        curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
        // Make the call
        $json = curl_exec($session);
        // The web service returns json. Set the Content-Type appropriately
        header("Content-Type: application/json");
        echo $json;
        $obj =  json_decode($json,false);
        $result  =  $obj->{"result"};
        echo $result;
        curl_close($session);
        </pre>
        
        <p>The result will contain the image name. the image can be accessed by http://silpa.smc.org.in/Render?image=abcd.png</p>
        <h3>Wiki to PDF</h2>
        The wiki2pdf method is accessible by the following JSON:
        
        <pre class="code">
            $postvars = '{"method": "modules.Render.wiki2pdf", "params": ["http://en.wikipedia.org/wiki/Kerala"], "id":"jsonrpc"}';
        </pre>
        
    </div>
</div>
{% endblock %}