Improving alignment consistency between Latex and regular text

app-sample/src/main/java/io/noties/markwon/app/samples/latex/LatexInlineSample.java

@@ -20,9 +20,41 @@ public class LatexInlineSample extends MarkwonTextViewSample {
   @Override
   public void render() {
     final String md = "" +
-      "# LaTeX inline\n" +
-      "hey = $$" + LatexHolder.LATEX_BANGLE + "$$,\n" +
-      "that's it!";
+      "Here are some common mathematical formulas:\n" +
+      "\n" +
+      "Quadratic formula: $$ ax^2+bx+c=0 $$\n" +
+      "\n" +
+      "Pythagorean theorem: $$ a^2+b^2=c^2 $$\n" +
+      "\n" +
+      "Euler's formula: $$e^{ix}=\\cos{x}+i\\sin{x}$$\n" +
+      "\n" +
+      "Trigonometric identity: $$\\sin^2{x}+\\cos^2{x}=1$$\n" +
+      "\n" +
+      "Taylor series expansion: $$f(x)=\\sum_{n=0}^{\\infty} \\frac{f^{(n)}(a)}{n!}(x-a)^n$$\n" +
+      "\n" +
+      "Matrix multiplication: $$C_{i,j}=\\sum_{k=1}^{n}A_{i,k}B_{k,j}$$\n" +
+      "\n" +
+      "Riemann hypothesis: $$\\zeta(s)=\\sum_{n=1}^{\\infty} \\frac{1}{n^s}=\\frac{1}{1-p^{-s}}\\prod_{\\text{prime }p} \\frac{1}{1-p^{-s}}$$\n" +
+      "\n" +
+      "Euler's identity: $$e^{i\\pi}+1=0$$\n" +
+      "\n" +
+      "Fermat's Last Theorem: $$a^n+b^n=c^n$$ has no integer solutions when $$n>2$$\n" +
+      "\n" +
+      "Riemann hypothesis: $$\\zeta(s)=\\sum_{n=1}^\\infty\\frac{1}{n^s}$$ has all its zeros on the line $$s=\\frac{1}{2}$$ when $$s=\\frac{1}{2}+it$$\n" +
+      "\n" +
+      "Einstein field equations: $$G_{\\mu\\nu}=8\\pi T_{\\mu\\nu}$$\n" +
+      "\n" +
+      "Black-Scholes theorem: Any directed graph can be decomposed into strongly connected components\n" +
+      "\n" +
+      "P vs. NP conjecture by American mathematician Andrew Wiles: NP problems cannot be solved in polynomial time\n" +
+      "\n" +
+      "Stirling's formula: $$n!=\\sqrt{2\\pi n}\\left(\\frac{n}{e}\\right)^n$$\n" +
+      "\n" +
+      "Mobius inversion formula: $$f(n)=\\sum_{d|n}g(d)\\Leftrightarrow g(n)=\\sum_{d|n}\\mu(d)f\\left(\\frac{n}{d}\\right)$$\n" +
+      "\n" +
+      "Fourier series: $$f(x)=\\frac{a_0}{2}+\\sum_{n=1}^\\infty\\left(a_n\\cos\\frac{n\\pi x}{L}+b_n\\sin\\frac{n\\pi x}{L}\\right)$$\n" +
+      "\n" +
+      "Riemann integral: $$\\int_0^\\infty\\frac{x^{s-1}}{e^x-1}dx=\\Gamma(s)\\zeta(s)$$";
 
     // inlines must be explicitly enabled and require `MarkwonInlineParserPlugin`
     final Markwon markwon = Markwon.builder(context)

markwon-ext-latex/src/main/java/io/noties/markwon/ext/latex/JLatexInlineAsyncDrawableSpan.java

@@ -40,12 +40,13 @@ public int getSize(
             final Rect rect = drawable.getBounds();
 
             if (fm != null) {
-                final int half = rect.bottom / 2;
-                fm.ascent = -half;
-                fm.descent = half;
+                Paint.FontMetricsInt originFont = paint.getFontMetricsInt();
+                int diff = rect.height() - (originFont.descent - originFont.ascent);
 
+                fm.descent = originFont.descent + diff / 2;
+                fm.ascent = fm.descent - rect.height();
                 fm.top = fm.ascent;
-                fm.bottom = 0;
+                fm.bottom = fm.descent;
             }
 
             size = rect.right;