From 410d735a3f7dfd9f3a8f9fa8aaa5cbb37cc86e82 Mon Sep 17 00:00:00 2001
From: wangyidong <wangyidong@cnezsoft.com>
Date: Sat, 13 Jul 2024 10:10:09 +0800
Subject: [PATCH]  * [perf story #59018] Export to png for gantt wg.

---
 lib/zin/wg/gantt/js/v1.js | 52 +++++++++++++++++++++++++++------------
 1 file changed, 36 insertions(+), 16 deletions(-)

diff --git a/lib/zin/wg/gantt/js/v1.js b/lib/zin/wg/gantt/js/v1.js
index b39b663cd2..ae759a9ebc 100644
--- a/lib/zin/wg/gantt/js/v1.js
+++ b/lib/zin/wg/gantt/js/v1.js
@@ -122,26 +122,46 @@ function drawGanttToCanvas(exportType, successCallback, errorCallback)
                     afterFinish(canvas);
                     if(errorCallback) errorCallback('Cannot convert image to blob.');
                 };
-                let width = canvas.width;
-                let height = canvas.height;
-                getRemoteScript(jsRoot + 'js/pdfjs/min.js', function()
+                if(isExportPDF)
                 {
-                    updateProgress(0.8);
-                    let pdf = new jsPDF(
+                    let width = canvas.width;
+                    let height = canvas.height;
+                    getRemoteScript(jsRoot + 'js/pdfjs/min.js', function()
                     {
-                        format: [width, height],
-                        unit: 'px',
-                        orientation: width > height ? 'l' : 'p'
+                        let pdf = new jsPDF(
+                        {
+                            format: [width, height],
+                            unit: 'px',
+                            orientation: width > height ? 'l' : 'p'
+                        });
+                        pdf.addImage(canvas, 0, 0, pdf.internal.pageSize.getWidth(), pdf.internal.pageSize.getHeight());
+                        pdf.save(fileName + '.pdf');
+                        if(successCallback) successCallback(pdf);
+                        afterFinish();
+                    }, function(error)
+                    {
+                        afterFinish(canvas);
+                        if(errorCallback) errorCallback(error);
                     });
-                    pdf.addImage(canvas, 0, 0, pdf.internal.pageSize.getWidth(), pdf.internal.pageSize.getHeight());
-                    pdf.save(fileName + '.pdf');
-                    if(successCallback) successCallback(pdf);
-                    afterFinish();
-                }, function(error)
+                }
+                else
                 {
-                    afterFinish(canvas);
-                    if(errorCallback) errorCallback(error);
-                });
+                    canvas.toBlob(function(blob)
+                    {
+                        let imageUrl = URL.createObjectURL(blob);
+                        if(navigator.msSaveBlob)
+                        {
+                            navigator.msSaveOrOpenBlob(blob, fileName + '.png');
+                        }
+                        else
+                        {
+                            $('#mainContent').append('<a id="ganttDownload" style="display:none;" download="' + fileName + '.png" target="_blank" href="' + imageUrl + '"></a>');
+                            $('#mainContent #ganttDownload')[0].click();
+                        }
+                        if(successCallback) successCallback(imageUrl);
+                        afterFinish(canvas);
+                    });
+                }
             }).catch(function(error)
             {
                 afterFinish();