Added free-text and free-math modes (multiline latex support)

CHANGELOG.md

@@ -1,3 +1,8 @@
+## [Unreleased]
+
+- Added experimental `free-math` multiline mathfield mode alongside `free-text`, preserving rows, empty lines, tabs, clipboard plain text, and public output formats when values are round-tripped.
+- Fixed `free-text` fields to resolve direction independently for every line, keep mixed Hebrew/Latin prose in Unicode bidi order, isolate math and active LaTeX runs as LTR, and render the visual caret beside the logical insertion point instead of pinning it to the RTL edge.
+
 ## 0.110.0 _2026-06-08_
 
 ### Security Advisories

css/core.less

@@ -75,6 +75,14 @@
   white-space: pre;
 }
 
+.ML__text.ML__underline {
+  text-decoration: underline;
+}
+
+.ML__text.ML__line-through {
+  text-decoration: line-through;
+}
+
 /* Use cmr for 'math upright' */
 .ML__cmr {
   font-family: KaTeX_Main;

css/mathfield.less

@@ -199,6 +199,40 @@
   }
 }
 
+// Free-text is a text editor whose lines happen to use MathLive's multiline
+// array model. Keep the editor at the host's logical start rather than using
+// the centered formula presentation. In RTL fields flex-start is the right
+// edge, while the nested formula renderer remains LTR for math islands.
+.ML__content:has(.ML__free-text-root) {
+  justify-content: flex-start;
+  text-align: start;
+}
+
+:host([dir='rtl']) .ML__free-text-root {
+  direction: rtl;
+}
+
+:host([dir='ltr']) .ML__free-text-root {
+  direction: ltr;
+}
+
+.ML__free-text-root .col-align-l > .ML__vlist-t {
+  text-align: start;
+}
+
+.ML__free-text-line {
+  text-align: start;
+}
+
+.ML__free-text-line[dir='auto'] {
+  unicode-bidi: plaintext;
+}
+
+.ML__free-text-math-island {
+  direction: ltr;
+  unicode-bidi: isolate;
+}
+
 /* Container for the virtual keyboard toggle and menu toggle buttons */
 .ML__toggles {
   display: flex;