term: move the term core to subprojects/term

The core now builds, tests, and benchmarks alone, as a Meson subproject
with no dependency on the main tree.

- include/term/ holds term.h and the header-only unicode/. src/ holds
  the core and its private headers. The main tree gets only
  include/term through term_dep, so it cannot reach a private header.
- The term tests, the term benchmarks, the Kitty parser suite, and
  tools/amalgamate.py and tools/generate_unicode.py move with it. The
  tests run as term:<name>.
- The main build passes its -march (arch_flag) and b_ndebug to the
  subproject. A directory configured before this commit needs
  meson configure -Dterm:arch_flag=-march=... once.
- The term tests compile with -UNDEBUG. They do work inside assert.
- The subproject exports term_test_dep with term_api.h, for the main
  tree's render, thumbnail, color, and selection tests.
- The Kitty bridge used struct vector2i and has not compiled since the
  public API redesign. It builds again. 2 of its 14 tests fail: REP
  after a tab, and a cursor report after a resize.
- dirgraph.py drops the term and unicode layers. Its self-test uses pty.
- The symbols test ignores the __odr_asan symbols that ASan adds.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/src/osc/misc.c b/src/osc/misc.c
new file mode 100644
index 0000000..5d6b506
--- /dev/null
+++ b/src/osc/misc.c
@@ -0,0 +1,69 @@
+#include "osc.h"
+#include "../internal.h"
+#include <stdlib.h>
+#include <string.h>
+
+static void osc7_cwd(struct term *t, const char *uri)
+{
+    if (!term_has_prefix_ci(uri, "file://"))
+        return;
+    const char *p = uri + 7;
+    const char *slash = strchr(p, '/');
+    const char *path = slash ? slash : p;
+    char *cwd = malloc(strlen(path) + 1);
+    if (!cwd)
+        return;
+    char *d = cwd;
+    while (*path) {
+        int hi, lo;
+        if (*path == '%' && (hi = term_hex_nib(path[1])) >= 0 &&
+            (lo = term_hex_nib(path[2])) >= 0) {
+            *d++ = (char)(hi * 16 + lo);
+            path += 3;
+        } else {
+            *d++ = *path++;
+        }
+    }
+    *d = '\0';
+    free(t->cwd);
+    t->cwd = cwd;
+}
+
+static void osc777_notify(struct term *t, const char *params)
+{
+    if (strncmp(params, "notify;", 7))
+        return;
+    const char *title = params + 7;
+    const char *sep = strchr(title, ';');
+    if (!sep)
+        return;
+    char *wsep = (char *)sep;
+    *wsep = '\0';
+    t->cb.notify(t->cb.ud, title, sep + 1);
+    *wsep = ';';
+}
+
+void term_osc_misc_dispatch(struct term *t, long code, const char *params)
+{
+    if (!params)
+        return;
+    switch (code) {
+    case 7:
+        osc7_cwd(t, params);
+        break;
+    case 9:
+        if (t->cb.notify && strncmp(params, "4;", 2))
+            t->cb.notify(t->cb.ud, "wsap_term", params);
+        break;
+    case 22:
+        free(t->pointer_shape);
+        t->pointer_shape = *params ? term_strdup(params) : NULL;
+        break;
+    case 777:
+        if (t->cb.notify)
+            osc777_notify(t, params);
+        break;
+    default:
+        break;
+    }
+}