fix: render text macros in pspicture labels

bundle/latex2html5.bundle.js

@@ -4785,6 +4785,9 @@ var LaTeX2HTML5 = (() => {
             });
             return;
           }
+          if (typeof data.text === "string") {
+            data.text = this.parseLabel(data.text);
+          }
         }
         plot[k].push({ data, env, match: m, fn: this.PSTricks.Functions[k] });
         if (this.dialect === "pstricks") {
@@ -4906,13 +4909,41 @@ var LaTeX2HTML5 = (() => {
       return contents;
     }
     parseText(line) {
+      var contents = this.parseTextTransforms(line);
+      Object.entries(this.Headers.Expressions).forEach(([k, exp]) => {
+        contents = this.parseHeadersExpression(line, exp, k, contents);
+      });
+      return contents;
+    }
+    parseLabel(line) {
+      var contents = "";
+      var textStart = 0;
+      var mathStart = -1;
+      for (var i = 0; i < line.length; i++) {
+        if (line[i] !== "$") {
+          continue;
+        }
+        if (mathStart === -1) {
+          contents += this.parseTextTransforms(line.slice(textStart, i));
+          mathStart = i;
+        } else {
+          contents += line.slice(mathStart, i + 1);
+          textStart = i + 1;
+          mathStart = -1;
+        }
+      }
+      if (mathStart === -1) {
+        contents += this.parseTextTransforms(line.slice(textStart));
+      } else {
+        contents += this.parseTextTransforms(line.slice(mathStart));
+      }
+      return contents;
+    }
+    parseTextTransforms(line) {
       var contents = line;
       Object.entries(this.Text.Expressions).forEach(([k, exp]) => {
         contents = this.parseTextExpression(line, exp, k, contents);
       });
-      Object.entries(this.Headers.Expressions).forEach(([k, exp]) => {
-        contents = this.parseHeadersExpression(line, exp, k, contents);
-      });
       return contents;
     }
     // -------------------------------------------------------------------------

packages/latex2js/src/lib/parser.ts

@@ -882,6 +882,9 @@ class Parser {
           });
           return;
         }
+        if (typeof data.text === 'string') {
+          data.text = this.parseLabel(data.text);
+        }
       }
 
       plot[k].push({ data: data, env: env, match: m, fn: this.PSTricks.Functions[k] });
@@ -1032,11 +1035,7 @@ class Parser {
   }
 
   parseText(line: string): string {
-    var contents = line;
-    // TEXT
-    Object.entries(this.Text.Expressions).forEach(([k, exp]: [string, any]) => {
-      contents = this.parseTextExpression(line, exp, k, contents);
-    });
+    var contents = this.parseTextTransforms(line);
 
     // HEADERS
     Object.entries(this.Headers.Expressions).forEach(([k, exp]: [string, any]) => {
@@ -1046,6 +1045,43 @@ class Parser {
     return contents;
   }
 
+  parseLabel(line: string): string {
+    var contents = '';
+    var textStart = 0;
+    var mathStart = -1;
+
+    for (var i = 0; i < line.length; i++) {
+      if (line[i] !== '$') {
+        continue;
+      }
+      if (mathStart === -1) {
+        contents += this.parseTextTransforms(line.slice(textStart, i));
+        mathStart = i;
+      } else {
+        contents += line.slice(mathStart, i + 1);
+        textStart = i + 1;
+        mathStart = -1;
+      }
+    }
+
+    if (mathStart === -1) {
+      contents += this.parseTextTransforms(line.slice(textStart));
+    } else {
+      contents += this.parseTextTransforms(line.slice(mathStart));
+    }
+
+    return contents;
+  }
+
+  parseTextTransforms(line: string): string {
+    var contents = line;
+    Object.entries(this.Text.Expressions).forEach(([k, exp]: [string, any]) => {
+      contents = this.parseTextExpression(line, exp, k, contents);
+    });
+
+    return contents;
+  }
+
   // -------------------------------------------------------------------------
   // Diagnostics
   // -------------------------------------------------------------------------

packages/latex2js/test/parser-semantics.test.ts

@@ -174,6 +174,31 @@ describe('Peggy grammar parser (new)', () => {
     expect(env.plot.rput[0].data.text).toBe('$a--b$');
   });
 
+  it('applies text transforms to rput labels', () => {
+    const parsed = latex.parse(`
+\\begin{pspicture}(0,0)(4,4)
+\\rput(1.5,1){\\LaTeX}
+\\rput(2,1){\\TeX}
+\\rput(0.3,3.75){ $Im$ }
+\\end{pspicture}
+    `);
+
+    const env = parsed.find((e: any) => e.type === 'pspicture');
+    const labels = env.plot.rput.map((rput: any) => rput.data.text);
+    expect(labels).toEqual(['$\\LaTeX$', '$\\TeX$', ' $Im$ ']);
+  });
+
+  it('transforms non-math parts of mixed rput labels', () => {
+    const parsed = latex.parse(`
+\\begin{pspicture}(0,0)(4,4)
+\\rput(1,1){{\\LaTeX\\ vs $a--b$}}
+\\end{pspicture}
+    `);
+
+    const env = parsed.find((e: any) => e.type === 'pspicture');
+    expect(env.plot.rput[0].data.text).toBe('{$\\LaTeX$ vs $a--b$}');
+  });
+
   it('collects diagnostics for unknown commands', () => {
     const parsed = latex.parse(`
 \\begin{pspicture}(0,0)(4,4)