openSourceRemote/mind-map
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Feat：减小导出的pdf体积

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街角小林 2023-12-11 09:57:32 +08:00
parent 2678e429aa
commit f79a7fc117
1 changed files with 11 additions and 3 deletions
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14
simple-mind-map/src/plugins/ExportPDF.js
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@ -20,7 +20,11 @@ class ExportPDF {
// 单页导出 // 单页导出
onePageExport(name, img) { onePageExport(name, img) {
return new Promise((resolve, reject) => { return new Promise((resolve, reject) => {
let pdf = new JsPDF('', 'pt', 'a4') let pdf = new JsPDF({
unit: 'pt',
format: 'a4',
compress: true
})
let a4Ratio = a4Size.width / a4Size.height let a4Ratio = a4Size.width / a4Size.height
let image = new Image() let image = new Image()
image.onload = () => { image.onload = () => {
@ -75,7 +79,11 @@ class ExportPDF {
// a4纸的尺寸[595.28,841.89]，图片在pdf中图片的宽高 // a4纸的尺寸[595.28,841.89]，图片在pdf中图片的宽高
let imgWidth = a4Size.width let imgWidth = a4Size.width
let imgHeight = (a4Size.width / imageWidth) * imageHeight let imgHeight = (a4Size.width / imageWidth) * imageHeight
let pdf = new JsPDF('', 'pt', 'a4') let pdf = new JsPDF({
unit: 'pt',
format: 'a4',
compress: true
})
// 有两个高度需要区分，一个是图片的实际高度，和生成pdf的页面高度(841.89) // 有两个高度需要区分，一个是图片的实际高度，和生成pdf的页面高度(841.89)
// 当内容未超过pdf一页显示的范围，无需分页 // 当内容未超过pdf一页显示的范围，无需分页
if (leftHeight < pageHeight) { if (leftHeight < pageHeight) {
@ -102,7 +110,7 @@ class ExportPDF {
pdf.save(name) pdf.save(name)
resolve() resolve()
} }
image.onerror = (e) => { image.onerror = e => {
reject(e) reject(e)
} }
image.src = img image.src = img