✨ Support adding the watermark on export PDF https://github.com/siyuan-note/siyuan/issues/9961

app/appearance/langs/en_US.json

@@ -941,6 +941,9 @@
   "export24": "After enabling, add some general metadata information at the beginning of the exported Markdown file",
   "export25": "Export Word .docx template path",
   "export26": "The absolute path of the template used when exporting Word .docx files, that is, Pandoc <a href=\"https://pandoc.org/MANUAL.html#option--reference-doc\" target=\"_blank \">--reference-doc</a> parameter value",
+  "export27": "Export PDF watermark",
+  "export28": "Watermark text or watermark file path",
+  "export29": "Watermark position, size and style, etc.",
   "theme11": "Use theme in light mode",
   "theme12": "Use theme in dark mode",
   "theme2": "Select the icons used in the user interface",

app/appearance/langs/es_ES.json

@@ -941,6 +941,9 @@
   "export24": "Después de habilitar, agregue información general de metadatos al comienzo del archivo Markdown exportado",
   "export25": "Exportar ruta de plantilla .docx de Word",
   "export26": "La ruta absoluta de la plantilla utilizada al exportar archivos .docx de Word, es decir, Pandoc <a href=\"https://pandoc.org/MANUAL.html#option--reference-doc\" target =\"_blank\">--reference-doc</a> valor del parámetro",
+  "export27": "Exportar marca de agua PDF",
+  "export28": "Texto de marca de agua o ruta del archivo de marca de agua",
+  "export29": "Posición, tamaño y estilo de la marca de agua, etc.",
   "theme11": "Usar tema en modo claro",
   "theme12": "Usar tema en modo oscuro",
   "theme2": "Selecciona los iconos utilizados en la interfaz de usuario",

app/appearance/langs/fr_FR.json

@@ -941,6 +941,9 @@
   "export24": "Après l'activation, ajoutez des informations générales sur les métadonnées au début du fichier Markdown exporté",
   "export25": "Chemin d'exportation du modèle Word .docx",
   "export26": "Le chemin absolu du modèle utilisé lors de l'exportation de fichiers Word .docx, c'est-à-dire Pandoc <a href=\"https://pandoc.org/MANUAL.html#option--reference-doc\" target =\"_blank\">--reference-doc</a> valeur du paramètre",
+  "export27": "Exporter le filigrane PDF",
+  "export28": "Texte du filigrane ou chemin du fichier de filigrane",
+  "export29": "Position, taille et style du filigrane, etc.",
   "theme11": "Utiliser le thème en mode Clair",
   "theme12": "Utiliser le thème en mode sombre",
   "theme2": "Sélectionnez les icônes utilisées dans l'interface utilisateur",

app/appearance/langs/zh_CHT.json

@@ -941,6 +941,9 @@
   "export24": "啟用後在導出的 Markdown 文件開頭處添加一些較為通用的元資料資訊",
   "export25": "導出 Word .docx 模板路徑",
   "export26": "導出 Word .docx 文件時使用的模板絕對路徑，即 Pandoc <a href=\"https://pandoc.org/MANUAL.html#option--reference-doc\" target=\"_blank \">--reference-doc</a> 參數的值",
+  "export27": "導出 PDF 浮水印",
+  "export28": "浮水印文字或浮水印檔案路徑",
+  "export29": "浮水印位置、大小和樣式等",
   "theme11": "淺色模式下使用主題",
   "theme12": "深色模式下使用主題",
   "theme2": "選擇外觀使用的圖示",

app/appearance/langs/zh_CN.json

@@ -941,6 +941,9 @@
   "export24": "启用后在导出的 Markdown 文件开头处添加一些较为通用的元数据信息",
   "export25": "导出 Word .docx 模板路径",
   "export26": "导出 Word .docx 文件时使用的模板绝对路径，即 Pandoc <a href=\"https://pandoc.org/MANUAL.html#option--reference-doc\" target=\"_blank\">--reference-doc</a> 参数的值",
+  "export27": "导出 PDF 水印",
+  "export28": "水印文本或水印文件路径",
+  "export29": "水印位置、大小和样式等",
   "theme11": "明亮模式下使用主题",
   "theme12": "暗黑模式下使用主题",
   "theme2": "选择外观使用的图标",

app/src/config/exportConfig.ts

@@ -77,6 +77,17 @@ export const exportConfig = {
     </div>
     <input class="b3-text-field fn__flex-center fn__size200" id="pdfFooter">
 </div>
+<div class="fn__flex b3-label config__item">
+    <div class="fn__flex-1">
+        ${window.siyuan.languages.export27}
+        <div class="b3-label__text">${window.siyuan.languages.export28}</div>
+    </div>
+    <input class="b3-text-field fn__flex-center fn__size200" id="pdfWatermarkStr">
+    <div class="fn__flex-1">
+        <div class="b3-label__text">${window.siyuan.languages.export29}</div>
+    </div>
+    <input class="b3-text-field fn__flex-center fn__size200" id="pdfWatermarkDesc">
+</div>
 <div class="fn__flex b3-label config__item">
     <div class="fn__flex-1">
         ${window.siyuan.languages.export25}
@@ -139,6 +150,8 @@ export const exportConfig = {
     bindEvent: () => {
         (exportConfig.element.querySelector("#docxTemplate") as HTMLInputElement).value = window.siyuan.config.export.docxTemplate;
         (exportConfig.element.querySelector("#pdfFooter") as HTMLInputElement).value = window.siyuan.config.export.pdfFooter;
+        (exportConfig.element.querySelector("#pdfWatermarkStr") as HTMLInputElement).value = window.siyuan.config.export.pdfWatermarkStr;
+        (exportConfig.element.querySelector("#pdfWatermarkDesc") as HTMLInputElement).value = window.siyuan.config.export.pdfWatermarkDesc;
         (exportConfig.element.querySelector("#blockRefTextLeft") as HTMLInputElement).value = window.siyuan.config.export.blockRefTextLeft;
         (exportConfig.element.querySelector("#blockRefTextRight") as HTMLInputElement).value = window.siyuan.config.export.blockRefTextRight;
         (exportConfig.element.querySelector("#tagOpenMarker") as HTMLInputElement).value = window.siyuan.config.export.tagOpenMarker;
@@ -153,6 +166,8 @@ export const exportConfig = {
                 blockEmbedMode: parseInt((exportConfig.element.querySelector("#blockEmbedMode") as HTMLSelectElement).value, 10),
                 fileAnnotationRefMode: parseInt((exportConfig.element.querySelector("#fileAnnotationRefMode") as HTMLSelectElement).value, 10),
                 pdfFooter: (exportConfig.element.querySelector("#pdfFooter") as HTMLInputElement).value,
+                pdfWatermarkStr: (exportConfig.element.querySelector("#pdfWatermarkStr") as HTMLInputElement).value,
+                pdfWatermarkDesc: (exportConfig.element.querySelector("#pdfWatermarkDesc") as HTMLInputElement).value,
                 docxTemplate: (exportConfig.element.querySelector("#docxTemplate") as HTMLInputElement).value,
                 blockRefTextLeft: (exportConfig.element.querySelector("#blockRefTextLeft") as HTMLInputElement).value,
                 blockRefTextRight: (exportConfig.element.querySelector("#blockRefTextRight") as HTMLInputElement).value,

app/src/types/index.d.ts

@@ -594,6 +594,8 @@ interface IExport {
     addTitle: boolean;
     markdownYFM: boolean;
     pdfFooter: string;
+    pdfWatermarkStr: string;
+    pdfWatermarkDesc: string;
     docxTemplate: string;
 }
 

kernel/conf/export.go

@@ -30,6 +30,8 @@ type Export struct {
 	MarkdownYFM             bool   `json:"markdownYFM"`             // Markdown 导出时是否添加 YAML Front Matter https://github.com/siyuan-note/siyuan/issues/7727
 	PDFFooter               string `json:"pdfFooter"`               // PDF 导出时页脚内容
 	DocxTemplate            string `json:"docxTemplate"`            // Docx 导出时模板文件路径
+	PDFWatermarkStr         string `json:"pdfWatermarkStr"`         // PDF 导出时水印文本或水印文件路径
+	PDFWatermarkDesc        string `json:"pdfWatermarkDesc"`        // PDF 导出时水印位置、大小和样式等
 }
 
 func NewExport() *Export {

kernel/model/export.go

@@ -818,7 +818,7 @@ func ProcessPDF(id, p string, merge, removeAssets bool) (err error) {
 
 	processPDFBookmarks(pdfCtx, headings)
 	processPDFLinkEmbedAssets(pdfCtx, assetDests, removeAssets)
-	// processPDFWatermark(pdfCtx, "text", "Test", "")
+	processPDFWatermark(pdfCtx)
 
 	pdfcpu.VersionStr = "SiYuan v" + util.Ver
 	if writeErr := api.WriteContextFile(pdfCtx, p); nil != writeErr {
@@ -828,32 +828,45 @@ func ProcessPDF(id, p string, merge, removeAssets bool) (err error) {
 	return
 }
 
-func processPDFWatermark(pdfCtx *pdfcpu.Context, mode, watermark, desc string) {
+func processPDFWatermark(pdfCtx *pdfcpu.Context) {
 	// Support adding the watermark on export PDF https://github.com/siyuan-note/siyuan/issues/9961
 	// https://pdfcpu.io/core/watermark
 
+	str := Conf.Export.PDFWatermarkStr
+	if "" == str {
+		return
+	}
+
 	if !IsPaidUser() {
 		return
 	}
 
-	if "" == watermark {
+	desc := Conf.Export.PDFWatermarkDesc
-		return
+	f, e := pdfCtx.ExtractFont(1)
+	if nil == e {
+		desc = "fontname:" + f.Name
 	}
 
-	if "text" != mode && "image" != mode && "pdf" != mode {
+	mode := "text"
-		logging.LogErrorf("invalid watermark type: %s", mode)
+	if gulu.File.IsExist(str) {
-		return
+		if ".pdf" == strings.ToLower(filepath.Ext(str)) {
+			mode = "pdf"
+		} else {
+			mode = "image"
 		}
+	}
+
+	logging.LogInfof("add PDF watermark [mode=%s, str=%s, desc=%s]", mode, str, desc)
 
 	var wm *pdfcpu.Watermark
 	var err error
 	switch mode {
 	case "text":
-		wm, err = pdfcpu.ParseTextWatermarkDetails(watermark, desc, false, pdfcpu.POINTS)
+		wm, err = pdfcpu.ParseTextWatermarkDetails(str, desc, false, pdfcpu.POINTS)
 	case "image":
-		wm, err = pdfcpu.ParseImageWatermarkDetails(watermark, desc, false, pdfcpu.POINTS)
+		wm, err = pdfcpu.ParseImageWatermarkDetails(str, desc, false, pdfcpu.POINTS)
 	case "pdf":
-		wm, err = pdfcpu.ParsePDFWatermarkDetails(watermark, desc, false, pdfcpu.POINTS)
+		wm, err = pdfcpu.ParsePDFWatermarkDetails(str, desc, false, pdfcpu.POINTS)
 	}
 
 	if nil != err {