From d75004f8e5658d77565dda3ae17c0ff2a0728790 Mon Sep 17 00:00:00 2001
From: Renaud Le Gac <legac@cppm.in2p3.fr>
Date: Tue, 9 Sep 2014 16:45:29 +0200
Subject: [PATCH] First tentative to implement the latex to pdf conversion. The
current version is not yet working as it should.
---
controllers/plugin_dbui.py | 40 ++++++
static/plugin_dbui/src/grid/plugin/Export.js | 137 +++++++++++++++----
views/plugin_dbui/latex2pdf.html | 10 ++
3 files changed, 162 insertions(+), 25 deletions(-)
create mode 100644 views/plugin_dbui/latex2pdf.html
diff --git a/controllers/plugin_dbui.py b/controllers/plugin_dbui.py
index e022f930..0adcd8d0 100644
--- a/controllers/plugin_dbui.py
+++ b/controllers/plugin_dbui.py
@@ -359,6 +359,46 @@ def index():
return dict(plugin=plugin)
+def latex2pdf():
+ """Convert a LaTeX file into PDF.
+
+ """
+ from subprocess import call
+ from tempfile import TemporaryFile
+ from uuid import uuid4
+
+ latex = request.vars.latex
+#
+# # create the latex file in the private directory
+# cwd = os.getcwd()
+# os.chdir(os.path.join(request.folder, 'private'))
+#
+# fn = str(uuid4())
+# fi = open('%s.tex' % fn, 'wb')
+# fi.write(latex)
+# fi.close()
+#
+# # convert the latex file into pdf
+# cmd = ['pdflatex', '-interaction', 'nonstopmode', '%s.tex' % fn]
+# call(cmd, stdout=TemporaryFile())
+#
+# # copy the pdf in a string
+# fi = open('%s.pdf' % fn, 'rb')
+# s_pdf = fi.read()
+# fi.close()
+#
+# # clean latex processing
+# for ext in ('aux', 'log', 'pdf', 'tex'):
+# f = '%s.%s' % (fn, ext)
+# if os.path.exists(f):
+# os.remove(f)
+#
+# # go back to the web2py main directory
+# os.chdir(cwd)
+ s_pdf = latex
+ return dict(data=s_pdf)
+
+
def status():
return dict(request=request, response=response, session=session)
diff --git a/static/plugin_dbui/src/grid/plugin/Export.js b/static/plugin_dbui/src/grid/plugin/Export.js
index 992c5d2a..5cbc3cd8 100644
--- a/static/plugin_dbui/src/grid/plugin/Export.js
+++ b/static/plugin_dbui/src/grid/plugin/Export.js
@@ -14,13 +14,13 @@ Ext.define('App.grid.plugin.Export', {
/**
* @cfg {String}
- * The CSV delimiter for stirng.
+ * The CSV delimiter for string.
*/
delimiter: '"',
/**
* @cfg {String}
- * The new line separator used in the CSV file.
+ * The new line separator used in the CSV / LaTeX file.
*/
newLine: '\n',
@@ -112,10 +112,9 @@ Ext.define('App.grid.plugin.Export', {
},
/**
- * Download the data using URI embedded into an HTML link.
- * The URI is build from the first three arguments.
- * In addition, the data are HTML encoded to preserve special
- * character like /, ?, ...
+ * Download the data as a file using an URI.
+ * The URI is built from the arguments and the data are HTML
+ * encoded to preserve special character like quote, /, ?, ...
*
* @param {String}
* The mine type of the return file, e.g "text/csv".
@@ -123,32 +122,30 @@ Ext.define('App.grid.plugin.Export', {
* @param {String}
* The data encoding, e.g. "utf-8".
*
- * @param {String[]}
+ * @param {String/String[]}
* The content of the file, one string per line.
*
- * @param {String}
- * The file name with its extension.
- *
*/
- download: function (minetype, encoding, data, filename) {
+ downloadViaURI: function (minetype, encoding, data) {
"use strict";
- var uri = "data:" + minetype + ";charset=" + encoding +",",
- link;
+ var uri;
- // special character like quote, / , ? are HTML encoded
- uri += encodeURIComponent(data.join(this.newLine));
+ // build the data string in which special
+ // character like quote, / , ? are HTML encoded
+ if (Ext.isArray(data)) {
+ data = data.join(this.newLine);
+ }
+ data = encodeURIComponent(data);
- // download the file by simulating a click on a link
- link = Ext.getBody().createChild({
- tag: "a",
- href: uri,
- download: filename
- });
+ // build the URI
+ uri = "data:" + minetype + ";";
+ uri += "charset=" + encoding +",";
+ uri += data;
- link.dom.click();
- link.destroy();
+ // stimulate the browser to mimic the field download
+ window.location.href = uri;
},
/**
@@ -367,7 +364,7 @@ Ext.define('App.grid.plugin.Export', {
"use strict";
var data = this.getCSV();
- this.download("text/csv", "utf-8", data, "my_data.csv");
+ this.downloadViaURI("text/csv", "utf-8", data);
},
/**
@@ -413,16 +410,106 @@ Ext.define('App.grid.plugin.Export', {
"use strict";
var data = this.getLaTeX();
- this.download("application/x-latex", "utf-8", data, "my_data.tex");
+ this.downloadViaURI("application/x-latex", "utf-8", data);
},
/**
* Export the content of the grid as a PDF file.
*
*/
+ downloadViaIFRAME: function (panel, url) {
+
+ "use strict";
+
+ var frameId = 'mainPanelIframe',
+ iframe;
+
+ // destroy IFRAME previously embedded in the panel
+ iframe = Ext.getBody().getById(frameId);
+ if (iframe) {
+ Ext.destroy(iframe);
+ }
+
+ // launch a progress bar
+ Ext.MessageBox.show({
+ msg: 'Preparing your file, please wait...',
+ progressText: 'Saving...',
+ width: 300,
+ wait: true
+ });
+
+ // append the IFRAME to the panel therefore
+ // the browser will launch the downloading.
+ //
+ // NOTE: the IFRAME cover almost the full space.
+ // this is useful when the PDF is embedded in the panel.
+ //
+ // NOTE: keep the background colour to white
+ //
+ iframe = Ext.getBody().createChild({
+ tag: 'iframe',
+ id: frameId,
+ frameborder: 0,
+ width: '100%',
+ height: '99%',
+ style: 'background: #00FF00;',
+ src: url
+ });
+
+ // when the download is finish hide message box
+ iframe.on('load', function () {
+ Ext.MessageBox.hide();
+ }, this, {single: true});
+ },
+
onPdfExport: function () {
"use strict";
+ /*
+ var data,
+ form,
+ url;
+
+ data = this.getLaTeX().join(this.newLine);
+ url = '/plugin_dbui/plugin_dbui/latex2pdf.html';
+
+ form = Ext.create('Ext.form.Panel', {
+ items: [{
+ name: 'latex',
+ value: data,
+ xtype:'textfield'
+ }],
+ standardSubmit: true,
+ url: url
+ });
+
+ console.log(form);
+ form.getForm().submit();
+ */
+
+ var url,
+ vars = {latex: undefined};
+
+ // build the url
+ vars.latex = this.getLaTeX().join(this.newLine);
+
+ url = '/plugin_dbui/plugin_dbui/latex2pdf.html' + '?' + Ext.Object.toQueryString(vars);
+
+ this.downloadViaIFRAME(this.getCmp(), url);
+
+ /*
+ // trigger the latex to pdf conversion on the server side
+ Ext.Ajax.request({
+ url: '/plugin_dbui/plugin_dbui/latex2pdf.html',
+ params: {latex: data},
+ scope: this,
+ success: function (response) {
+ console.log(response.responseText);
+ this.download("application/pdf", "utf-8", response.responseText, "my_data.pdf");
+ }
+ }); */
+
+
}
});
\ No newline at end of file
diff --git a/views/plugin_dbui/latex2pdf.html b/views/plugin_dbui/latex2pdf.html
new file mode 100644
index 00000000..ec25db31
--- /dev/null
+++ b/views/plugin_dbui/latex2pdf.html
@@ -0,0 +1,10 @@
+{{
+
+ try:
+ response.headers['Content-Type']='application/pdf'
+ response.write(data, escape=False)
+
+ except:
+ raise HTML(405, T('LaTeX to PDF conversion failed.'))
+
+}}
\ No newline at end of file
--
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