[IMP] mrp: Allow page-setting fields for pdf widget

This revision allows the page number of a pdf file to be set via an
integer field. If the pdf widget is attached to the 'field' field, then
the page can be changed via the 'field_page' field.

addons/mrp/static/src/js/mrp.js

@@ -46,10 +46,11 @@ var FieldPdfViewer = FieldBinaryFile.extend({
             field: this.name,
             id: this.res_id,
         };
+        var page = this.recordData[this.name + '_page'] || 1;
         var queryString = $.param(queryObj);
         var url = encodeURIComponent('/web/image?' + queryString);
         var viewerURL = '/web/static/lib/pdfjs/web/viewer.html?file=';
-        return viewerURL + url;
+        return viewerURL + url + '#page=' + page;
     },
     /**
      * @private

addons/mrp/static/tests/mrp_tests.js

@@ -80,7 +80,7 @@ QUnit.module('mrp', {
         assert.notOk(form.$('.o_field_widget iframe.o_pdfview_iframe').hasClass('o_hidden'),
             "there should be an visible iframe");
         assert.strictEqual(form.$('.o_field_widget iframe.o_pdfview_iframe').attr('data-src'),
-            '/web/static/lib/pdfjs/web/viewer.html?file=%2Fweb%2Fimage%3Fmodel%3Dpartner%26field%3Ddocument%26id%3D1',
+            '/web/static/lib/pdfjs/web/viewer.html?file=%2Fweb%2Fimage%3Fmodel%3Dpartner%26field%3Ddocument%26id%3D1#page=1',
             "the src attribute should be correctly set on the iframe");
 
         form.destroy();