Add filename template variable for text contents

See huiyadanli/PasteEx#89

PasteIntoFile/Dialog.cs

@@ -180,11 +180,20 @@ private void updateUiFromSettings() {
             _disableUiEvents = false;
         }
 
-        public static string formatFilenameTemplate(string template, DateTime timestamp, int count) {
-            return String.Format(template, timestamp, count);
+        public static string formatFilenameTemplate(string template, DateTime timestamp, int count, string textcontent) {
+            return string.Format(template, timestamp, count, textcontent);
+        }
+        public static string formatFilenameTemplate(string template, ClipboardContents contents, int count) {
+            var text = contents.Contents.OfType<TextContent>().FirstOrDefault()?.Text;
+            if (text != null) {
+                text = text.Trim().Split('\n').First().Trim(); // only first non-empty line
+                text = text.Substring(0, Math.Min(text.Length, 64)); // limit to 64 characters
+                text = Path.GetInvalidFileNameChars().Aggregate(text, (str, c) => str.Replace(c, '_')); // replace invalid chars
+            }
+            return formatFilenameTemplate(template, contents.Timestamp, count, text);
         }
         public string formatFilenameTemplate(string template) {
-            return formatFilenameTemplate(template, clipData.Timestamp, saveCount);
+            return formatFilenameTemplate(template, clipData, saveCount);
         }
         public void updateFilename(string filenameTemplate = null) {
             try {

PasteIntoFile/Main.cs

@@ -333,7 +333,7 @@ public static IDataObject PatchedClipboardContents() {
             // Analyze clipboard data
             if (Clipboard.ContainsFileDropList()) return null;
             var clipData = ClipboardContents.FromClipboard();
-            var filename = Dialog.formatFilenameTemplate(Settings.Default.filenameTemplate, clipData.Timestamp, saveCount);
+            var filename = Dialog.formatFilenameTemplate(Settings.Default.filenameTemplate, clipData, saveCount);
             var ext = Dialog.determineExtension(clipData);
             var contentToSave = clipData.ForExtension(ext);
             if (contentToSave == null) return null;

PasteIntoFile/Properties/Resources.de.resx

@@ -172,8 +172,9 @@ Tooltip</comment>
   </data>
   <data name="str_template_edit_info" xml:space="preserve">
     <value>Die Vorlage wird zum Formatieren des Standarddateinamens verwendet. Folgende Variablen stehen zur Verfügung:
-  {0} - Datum und Zeit
-  {1} - Zahl gespeicherter Dateien (Stapelverarbeitung)
+  	{0}  	Datum und Zeit
+  	{1}  	Zahl gespeicherter Dateien (Stapelverarbeitung)
+  	{2}  	Text in der Zwischenablage
 Für Details zur Formatierung &lt;a&gt;hier klicken&lt;/a&gt;.</value>
   </data>
   <data name="str_template_edit_info_url" xml:space="preserve">

PasteIntoFile/Properties/Resources.resx

@@ -181,8 +181,9 @@ Do you want to overwrite it?</value>
   </data>
   <data name="str_template_edit_info" xml:space="preserve">
     <value>The template is used to format the filename. The following variables are supported:
-  {0} - Date and time
-  {1} - Save count in batch mode
+  	{0}  	Date and time
+  	{1}  	Save count in batch mode
+  	{2}  	Clipboard text
 For details on the format specifiers &lt;a&gt;click here&lt;/a&gt;.</value>
   </data>
   <data name="str_template_edit_info_url" xml:space="preserve">

PasteIntoFile/TemplateEdit.cs

@@ -29,6 +29,7 @@ public TemplateEdit() {
                 "{0:yyyyMMdd_HHmmss}",
                 "{0:yyyy-MM-dd}_{1:000}",
                 "PasteIntoFile_{1:000}_{0:fffffff}",
+                "{2}",
             });
             textTemplate.Text = Settings.Default.filenameTemplate;