Add python/textual to YDB

commit_hash:eda16a869229724fec5479fa27fa5cdbccbe0395

1 files changed, 75 insertions, 0 deletions

diff --git a/contrib/python/markdown-it-py/markdown_it/helpers/parse_link_title.py b/contrib/python/markdown-it-py/markdown_it/helpers/parse_link_title.py
new file mode 100644
index 00000000000..a38ff0d98ac
--- /dev/null
+++ b/contrib/python/markdown-it-py/markdown_it/helpers/parse_link_title.py
@@ -0,0 +1,75 @@
+"""Parse link title"""
+
+from ..common.utils import charCodeAt, unescapeAll
+
+
+class _State:
+    __slots__ = ("can_continue", "marker", "ok", "pos", "str")
+
+    def __init__(self) -> None:
+        self.ok = False
+        """if `true`, this is a valid link title"""
+        self.can_continue = False
+        """if `true`, this link can be continued on the next line"""
+        self.pos = 0
+        """if `ok`, it's the position of the first character after the closing marker"""
+        self.str = ""
+        """if `ok`, it's the unescaped title"""
+        self.marker = 0
+        """expected closing marker character code"""
+
+    def __str__(self) -> str:
+        return self.str
+
+
+def parseLinkTitle(
+    string: str, start: int, maximum: int, prev_state: _State | None = None
+) -> _State:
+    """Parse link title within `str` in [start, max] range,
+    or continue previous parsing if `prev_state` is defined (equal to result of last execution).
+    """
+    pos = start
+    state = _State()
+
+    if prev_state is not None:
+        # this is a continuation of a previous parseLinkTitle call on the next line,
+        # used in reference links only
+        state.str = prev_state.str
+        state.marker = prev_state.marker
+    else:
+        if pos >= maximum:
+            return state
+
+        marker = charCodeAt(string, pos)
+
+        # /* " */  /* ' */  /* ( */
+        if marker != 0x22 and marker != 0x27 and marker != 0x28:
+            return state
+
+        start += 1
+        pos += 1
+
+        # if opening marker is "(", switch it to closing marker ")"
+        if marker == 0x28:
+            marker = 0x29
+
+        state.marker = marker
+
+    while pos < maximum:
+        code = charCodeAt(string, pos)
+        if code == state.marker:
+            state.pos = pos + 1
+            state.str += unescapeAll(string[start:pos])
+            state.ok = True
+            return state
+        elif code == 0x28 and state.marker == 0x29:  # /* ( */  /* ) */
+            return state
+        elif code == 0x5C and pos + 1 < maximum:  # /* \ */
+            pos += 1
+
+        pos += 1
+
+    # no closing marker found, but this link title may continue on the next line (for references)
+    state.can_continue = True
+    state.str += unescapeAll(string[start:pos])
+    return state