revert the template changes for the 2.1.17 release

LICENSE

@@ -6,6 +6,7 @@ The following included source code items use a license other than AGPL3:
 
 In the pylib folder:
 
+ * The anki/template/ folder is based off pystache: MIT.
  * The SuperMemo importer: GPL3.
  * The Pauker importer: BSD-3.
  * statsbg.py: CC BY-SA 3.0.

pylib/anki/collection.py

@@ -29,8 +29,8 @@ from anki.notes import Note
 from anki.rsbackend import RustBackend
 from anki.sched import Scheduler as V1Scheduler
 from anki.schedv2 import Scheduler as V2Scheduler
+from anki.sound import stripSounds
 from anki.tags import TagManager
-from anki.template import render_qa_from_field_map
 from anki.types import NoteType, QAData, Template
 from anki.utils import (
     devMode,
@@ -629,58 +629,51 @@ where c.nid = n.id and c.id in %s group by nid"""
             raise Exception()
         return [self._renderQA(*row) for row in self._qaData(where)]
 
-    # data is [cid, nid, mid, did, ord, tags, flds, cardFlags]
+    def _renderQA(self, data: QAData, qfmt: None = None, afmt: None = None) -> Dict:
-    def _renderQA(
-        self, data: QAData, qfmt: Optional[str] = None, afmt: Optional[str] = None
-    ) -> Dict[str, Union[str, int]]:
         "Returns hash of id, question, answer."
-        # extract info from data
+        # data is [cid, nid, mid, did, ord, tags, flds, cardFlags]
-        split_fields = splitFields(data[6])
+        # unpack fields and create dict
-        card_ord = data[4]
+        flist = splitFields(data[6])
+        fields = {}
         model = self.models.get(data[2])
+        assert model
+        for (name, (idx, conf)) in list(self.models.fieldMap(model).items()):
+            fields[name] = flist[idx]
+        fields["Tags"] = data[5].strip()
+        fields["Type"] = model["name"]
+        fields["Deck"] = self.decks.name(data[3])
+        fields["Subdeck"] = fields["Deck"].split("::")[-1]
+        fields["CardFlag"] = self._flagNameFromCardFlags(data[7])
         if model["type"] == MODEL_STD:
             template = model["tmpls"][data[4]]
         else:
             template = model["tmpls"][0]
-        flag = data[7]
+        fields["Card"] = template["name"]
-        deck_id = data[3]
+        fields["c%d" % (data[4] + 1)] = "1"
-        card_id = data[0]
+        # render q & a
-        tags = data[5]
+        d: Dict[str, Any] = dict(id=data[0])
         qfmt = qfmt or template["qfmt"]
         afmt = afmt or template["afmt"]
-
+        for (type, format) in (("q", qfmt), ("a", afmt)):
-        # create map of field names -> field content
+            if type == "q":
-        fields: Dict[str, str] = {}
+                format = re.sub(
-        for (name, (idx, conf)) in list(self.models.fieldMap(model).items()):
+                    "{{(?!type:)(.*?)cloze:", r"{{\1cq-%d:" % (data[4] + 1), format
-            fields[name] = split_fields[idx]
+                )
-
+                format = format.replace("<%cloze:", "<%%cq:%d:" % (data[4] + 1))
-        # add special fields
+            else:
-        fields["Tags"] = tags.strip()
+                format = re.sub("{{(.*?)cloze:", r"{{\1ca-%d:" % (data[4] + 1), format)
-        fields["Type"] = model["name"]
+                format = format.replace("<%cloze:", "<%%ca:%d:" % (data[4] + 1))
-        fields["Deck"] = self.decks.name(deck_id)
+                fields["FrontSide"] = stripSounds(d["q"])
-        fields["Subdeck"] = fields["Deck"].split("::")[-1]
+            fields = runFilter("mungeFields", fields, model, data, self)
-        fields["Card"] = template["name"]
+            html = anki.template.render(format, fields)
-        fields["CardFlag"] = self._flagNameFromCardFlags(flag)
+            d[type] = runFilter("mungeQA", html, type, fields, model, data, self)
-        fields["c%d" % (card_ord + 1)] = "1"
+            # empty cloze?
-
+            if type == "q" and model["type"] == MODEL_CLOZE:
-        fields = runFilter("mungeFields", fields, model, data, self)
+                if not self.models._availClozeOrds(model, data[6], False):
-
+                    d["q"] += "<p>" + _(
-        # render fields
+                        "Please edit this note and add some cloze deletions. (%s)"
-        qatext = render_qa_from_field_map(self, qfmt, afmt, fields, card_ord)
+                    ) % ("<a href=%s#cloze>%s</a>" % (HELP_SITE, _("help")))
-        ret: Dict[str, Any] = dict(q=qatext[0], a=qatext[1], id=card_id)
+        return d
-
-        # allow add-ons to modify the generated result
-        for type in "q", "a":
-            ret[type] = runFilter("mungeQA", ret[type], type, fields, model, data, self)
-
-        # empty cloze?
-        if type == "q" and model["type"] == MODEL_CLOZE:
-            if not self.models._availClozeOrds(model, data[6], False):
-                ret["q"] += "<p>" + _(
-                    "Please edit this note and add some cloze deletions. (%s)"
-                ) % ("<a href=%s#cloze>%s</a>" % (HELP_SITE, _("help")))
-
-        return ret
 
     def _qaData(self, where="") -> Any:
         "Return [cid, nid, mid, did, ord, tags, flds, cardFlags] db query"

pylib/anki/media.py

@@ -18,7 +18,6 @@ from anki.consts import *
 from anki.db import DB, DBError
 from anki.lang import _
 from anki.latex import mungeQA
-from anki.template import expand_clozes
 from anki.utils import checksum, isMac, isWin
 
 
@@ -217,7 +216,7 @@ create table meta (dirMod int, lastUsn int); insert into meta values (0, 0);
         if model["type"] == MODEL_CLOZE and "{{c" in string:
             # if the field has clozes in it, we'll need to expand the
             # possibilities so we can render latex
-            strings = expand_clozes(string)
+            strings = self._expandClozes(string)
         else:
             strings = [string]
         for string in strings:
@@ -232,6 +231,31 @@ create table meta (dirMod int, lastUsn int); insert into meta values (0, 0);
                         l.append(fname)
         return l
 
+    def _expandClozes(self, string: str) -> List[str]:
+        ords = set(re.findall(r"{{c(\d+)::.+?}}", string))
+        strings = []
+        from anki.template.template import (
+            clozeReg,
+            CLOZE_REGEX_MATCH_GROUP_HINT,
+            CLOZE_REGEX_MATCH_GROUP_CONTENT,
+        )
+
+        def qrepl(m):
+            if m.group(CLOZE_REGEX_MATCH_GROUP_HINT):
+                return "[%s]" % m.group(CLOZE_REGEX_MATCH_GROUP_HINT)
+            else:
+                return "[...]"
+
+        def arepl(m):
+            return m.group(CLOZE_REGEX_MATCH_GROUP_CONTENT)
+
+        for ord in ords:
+            s = re.sub(clozeReg % ord, qrepl, string)
+            s = re.sub(clozeReg % ".+?", arepl, s)
+            strings.append(s)
+        strings.append(re.sub(clozeReg % ".+?", arepl, string))
+        return strings
+
     def transformNames(self, txt: str, func: Callable) -> Any:
         for reg in self.regexps:
             txt = re.sub(reg, func, txt)

pylib/anki/template.py

@@ -1,145 +0,0 @@
-# Copyright: Ankitects Pty Ltd and contributors
-# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
-
-"""
-This file contains the Python portion of the template rendering code.
-
-Templates can have filters applied to field replacements. The Rust template
-rendering code will apply any built in filters, and stop at the first
-unrecognized filter. The remaining filters are returned to Python,
-and applied using the hook system. For example,
-{{myfilter:hint:text:Field}} will apply the built in text and hint filters,
-and then attempt to apply myfilter. If no add-ons have provided the filter,
-the text is not modified.
-
-Add-ons can register a filter by adding a hook to "fmod_<filter name>".
-As standard filters will not be run after a custom filter, it is up to the
-add-on to do any further processing that is required.
-
-The hook is called with the arguments
-(field_text, filter_args, field_map, field_name, "").
-The last argument is no longer used.
-If the field name contains a hyphen, it is split on the hyphen, eg
-{{foo-bar:baz}} calls fmod_foo with filter_args set to "bar".
-
-A Python implementation of the standard filters is currently available in the
-template_legacy.py file.
-"""
-
-from __future__ import annotations
-
-import re
-from typing import Dict, List, Tuple, Union
-
-import anki
-from anki.hooks import runFilter
-from anki.rsbackend import TemplateReplacement
-from anki.sound import stripSounds
-
-
-def render_template(
-    col: anki.storage._Collection, format: str, fields: Dict[str, str]
-) -> str:
-    "Render a single template."
-    rendered = col.backend.render_template(format, fields)
-    return apply_custom_filters(rendered, fields)
-
-
-def render_qa_from_field_map(
-    col: anki.storage._Collection,
-    qfmt: str,
-    afmt: str,
-    fields: Dict[str, str],
-    card_ord: int,
-) -> Tuple[str, str]:
-    "Renders the provided templates, returning rendered q & a text."
-    # question
-    format = re.sub("{{(?!type:)(.*?)cloze:", r"{{\1cq-%d:" % (card_ord + 1), qfmt)
-    format = format.replace("<%cloze:", "<%%cq:%d:" % (card_ord + 1))
-    qtext = render_template(col, format, fields)
-
-    # answer
-    format = re.sub("{{(.*?)cloze:", r"{{\1ca-%d:" % (card_ord + 1), afmt)
-    format = format.replace("<%cloze:", "<%%ca:%d:" % (card_ord + 1))
-    fields["FrontSide"] = stripSounds(qtext)
-    atext = render_template(col, format, fields)
-
-    return qtext, atext
-
-
-def apply_custom_filters(
-    rendered: List[Union[str, TemplateReplacement]], fields: Dict[str, str]
-) -> str:
-    "Complete rendering by applying any pending custom filters."
-    res = ""
-    for node in rendered:
-        if isinstance(node, str):
-            res += node
-        else:
-            res += apply_field_filters(
-                node.field_name, node.current_text, fields, node.filters
-            )
-    return res
-
-
-# Filters
-##########################################################################
-
-
-def apply_field_filters(
-    field_name: str, field_text: str, fields: Dict[str, str], filters: List[str]
-) -> str:
-    """Apply filters to field text, returning modified text."""
-    for filter in filters:
-        if "-" in filter:
-            filter_base, filter_args = filter.split("-", maxsplit=1)
-        else:
-            filter_base = filter
-            filter_args = ""
-
-        # the fifth argument is no longer used
-        field_text = runFilter(
-            "fmod_" + filter_base, field_text, filter_args, fields, field_name, ""
-        )
-    return field_text
-
-
-# Cloze handling
-##########################################################################
-
-# Matches a {{c123::clozed-out text::hint}} Cloze deletion, case-insensitively.
-# The regex should be interpolated with a regex number and creates the following
-# named groups:
-#   - tag: The lowercase or uppercase 'c' letter opening the Cloze.
-#          The c/C difference is only relevant to the legacy code.
-#   - content: Clozed-out content.
-#   - hint: Cloze hint, if provided.
-clozeReg = r"(?si)\{\{(?P<tag>c)%s::(?P<content>.*?)(::(?P<hint>.*?))?\}\}"
-
-# Constants referring to group names within clozeReg.
-CLOZE_REGEX_MATCH_GROUP_TAG = "tag"
-CLOZE_REGEX_MATCH_GROUP_CONTENT = "content"
-CLOZE_REGEX_MATCH_GROUP_HINT = "hint"
-
-# used by the media check functionality
-def expand_clozes(string: str) -> List[str]:
-    "Render all clozes in string."
-    ords = set(re.findall(r"{{c(\d+)::.+?}}", string))
-    strings = []
-
-    def qrepl(m):
-        if m.group(CLOZE_REGEX_MATCH_GROUP_HINT):
-            return "[%s]" % m.group(CLOZE_REGEX_MATCH_GROUP_HINT)
-        else:
-            return "[...]"
-
-    def arepl(m):
-        return m.group(CLOZE_REGEX_MATCH_GROUP_CONTENT)
-
-    for ord in ords:
-        s = re.sub(clozeReg % ord, qrepl, string)
-        s = re.sub(clozeReg % ".+?", arepl, s)
-        strings.append(s)
-    strings.append(re.sub(clozeReg % ".+?", arepl, string))
-
-    return strings

pylib/anki/template/LICENSE

@@ -0,0 +1,20 @@
+Copyright (c) 2009 Chris Wanstrath
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

pylib/anki/template/README.anki

@@ -0,0 +1,8 @@
+Anki uses a modified version of Pystache to provide Mustache-like syntax.
+Behaviour is a little different from standard Mustache:
+
+- {{text}} returns text verbatim with no HTML escaping
+- {{{text}}} does the same and exists for backwards compatibility
+- partial rendering is disabled for security reasons
+- certain keywords like 'cloze' are treated specially
+

pylib/anki/template/__init__.py

@@ -0,0 +1,14 @@
+from typing import Any
+
+from . import furigana, hint
+from .template import Template
+
+furigana.install()
+
+hint.install()
+
+
+def render(template, context=None, **kwargs) -> Any:
+    context = context and context.copy() or {}
+    context.update(kwargs)
+    return Template(template, context).render()

pylib/anki/template/furigana.py

@@ -0,0 +1,44 @@
+# Copyright: Ankitects Pty Ltd and contributors
+# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+# Based off Kieran Clancy's initial implementation.
+
+import re
+from typing import Any, Callable
+
+from anki.hooks import addHook
+
+r = r" ?([^ >]+?)\[(.+?)\]"
+ruby = r"<ruby><rb>\1</rb><rt>\2</rt></ruby>"
+
+
+def noSound(repl) -> Callable[[Any], Any]:
+    def func(match):
+        if match.group(2).startswith("sound:"):
+            # return without modification
+            return match.group(0)
+        else:
+            return re.sub(r, repl, match.group(0))
+
+    return func
+
+
+def _munge(s) -> Any:
+    return s.replace("&nbsp;", " ")
+
+
+def kanji(txt, *args) -> str:
+    return re.sub(r, noSound(r"\1"), _munge(txt))
+
+
+def kana(txt, *args) -> str:
+    return re.sub(r, noSound(r"\2"), _munge(txt))
+
+
+def furigana(txt, *args) -> str:
+    return re.sub(r, noSound(ruby), _munge(txt))
+
+
+def install() -> None:
+    addHook("fmod_kanji", kanji)
+    addHook("fmod_kana", kana)
+    addHook("fmod_furigana", furigana)

pylib/anki/template/hint.py

@@ -0,0 +1,26 @@
+# Copyright: Ankitects Pty Ltd and contributors
+# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+from anki.hooks import addHook
+from anki.lang import _
+
+
+def hint(txt, extra, context, tag, fullname) -> str:
+    if not txt.strip():
+        return ""
+    # random id
+    domid = "hint%d" % id(txt)
+    return """
+<a class=hint href="#"
+onclick="this.style.display='none';document.getElementById('%s').style.display='block';return false;">
+%s</a><div id="%s" class=hint style="display: none">%s</div>
+""" % (
+        domid,
+        _("Show %s") % tag,
+        domid,
+        txt,
+    )
+
+
+def install() -> None:
+    addHook("fmod_hint", hint)

pylib/anki/template/template.py

@@ -0,0 +1,307 @@
+import re
+from typing import Any, Callable, Dict, Pattern
+
+from anki.hooks import runFilter
+from anki.utils import stripHTML, stripHTMLMedia
+
+# Matches a {{c123::clozed-out text::hint}} Cloze deletion, case-insensitively.
+# The regex should be interpolated with a regex number and creates the following
+# named groups:
+#   - tag: The lowercase or uppercase 'c' letter opening the Cloze.
+#   - content: Clozed-out content.
+#   - hint: Cloze hint, if provided.
+clozeReg = r"(?si)\{\{(?P<tag>c)%s::(?P<content>.*?)(::(?P<hint>.*?))?\}\}"
+
+# Constants referring to group names within clozeReg.
+CLOZE_REGEX_MATCH_GROUP_TAG = "tag"
+CLOZE_REGEX_MATCH_GROUP_CONTENT = "content"
+CLOZE_REGEX_MATCH_GROUP_HINT = "hint"
+
+modifiers: Dict[str, Callable] = {}
+
+
+def modifier(symbol) -> Callable[[Any], Any]:
+    """Decorator for associating a function with a Mustache tag modifier.
+
+    @modifier('P')
+    def render_tongue(self, tag_name=None, context=None):
+        return ":P %s" % tag_name
+
+    {{P yo }} => :P yo
+    """
+
+    def set_modifier(func):
+        modifiers[symbol] = func
+        return func
+
+    return set_modifier
+
+
+def get_or_attr(obj, name, default=None) -> Any:
+    try:
+        return obj[name]
+    except KeyError:
+        return default
+    except:
+        try:
+            return getattr(obj, name)
+        except AttributeError:
+            return default
+
+
+class Template:
+    # The regular expression used to find a #section
+    section_re: Pattern = None
+
+    # The regular expression used to find a tag.
+    tag_re: Pattern = None
+
+    # Opening tag delimiter
+    otag = "{{"
+
+    # Closing tag delimiter
+    ctag = "}}"
+
+    def __init__(self, template, context=None) -> None:
+        self.template = template
+        self.context = context or {}
+        self.compile_regexps()
+
+    def render(self, template=None, context=None, encoding=None) -> str:
+        """Turns a Mustache template into something wonderful."""
+        template = template or self.template
+        context = context or self.context
+
+        template = self.render_sections(template, context)
+        result = self.render_tags(template, context)
+        # if encoding is not None:
+        #     result = result.encode(encoding)
+        return result
+
+    def compile_regexps(self) -> None:
+        """Compiles our section and tag regular expressions."""
+        tags = {"otag": re.escape(self.otag), "ctag": re.escape(self.ctag)}
+
+        section = r"%(otag)s[\#|^]([^\}]*)%(ctag)s(.+?)%(otag)s/\1%(ctag)s"
+        self.section_re = re.compile(section % tags, re.M | re.S)
+
+        tag = r"%(otag)s(#|=|&|!|>|\{)?(.+?)\1?%(ctag)s+"
+        self.tag_re = re.compile(tag % tags)
+
+    def render_sections(self, template, context) -> str:
+        """Expands sections."""
+        while 1:
+            match = self.section_re.search(template)
+            if match is None:
+                break
+
+            section, section_name, inner = match.group(0, 1, 2)
+            section_name = section_name.strip()
+
+            # check for cloze
+            val = None
+            m = re.match(r"c[qa]:(\d+):(.+)", section_name)
+            if m:
+                # get full field text
+                txt = get_or_attr(context, m.group(2), None)
+                m = re.search(clozeReg % m.group(1), txt)
+                if m:
+                    val = m.group(CLOZE_REGEX_MATCH_GROUP_TAG)
+            else:
+                val = get_or_attr(context, section_name, None)
+
+            replacer = ""
+            inverted = section[2] == "^"
+            if val:
+                val = stripHTMLMedia(val).strip()
+            if (val and not inverted) or (not val and inverted):
+                replacer = inner
+
+            template = template.replace(section, replacer)
+
+        return template
+
+    def render_tags(self, template, context) -> str:
+        """Renders all the tags in a template for a context."""
+        repCount = 0
+        while 1:
+            if repCount > 100:
+                print("too many replacements")
+                break
+            repCount += 1
+
+            match = self.tag_re.search(template)
+            if match is None:
+                break
+
+            tag, tag_type, tag_name = match.group(0, 1, 2)
+            tag_name = tag_name.strip()
+            try:
+                func = modifiers[tag_type]
+                replacement = func(self, tag_name, context)
+                template = template.replace(tag, replacement)
+            except (SyntaxError, KeyError):
+                return "{{invalid template}}"
+
+        return template
+
+    # {{{ functions just like {{ in anki
+    @modifier("{")
+    def render_tag(self, tag_name, context) -> Any:
+        return self.render_unescaped(tag_name, context)
+
+    @modifier("!")
+    def render_comment(self, tag_name=None, context=None) -> str:
+        """Rendering a comment always returns nothing."""
+        return ""
+
+    @modifier(None)
+    def render_unescaped(self, tag_name=None, context=None) -> Any:
+        """Render a tag without escaping it."""
+        txt = get_or_attr(context, tag_name)
+        if txt is not None:
+            # some field names could have colons in them
+            # avoid interpreting these as field modifiers
+            # better would probably be to put some restrictions on field names
+            return txt
+
+        # field modifiers
+        parts = tag_name.split(":")
+        extra = None
+        if len(parts) == 1 or parts[0] == "":
+            return "{unknown field %s}" % tag_name
+        else:
+            mods, tag = parts[:-1], parts[-1]  # py3k has *mods, tag = parts
+
+        txt = get_or_attr(context, tag)
+
+        # Since 'text:' and other mods can affect html on which Anki relies to
+        # process clozes, we need to make sure clozes are always
+        # treated after all the other mods, regardless of how they're specified
+        # in the template, so that {{cloze:text: == {{text:cloze:
+        # For type:, we return directly since no other mod than cloze (or other
+        # pre-defined mods) can be present and those are treated separately
+        mods.reverse()
+        mods.sort(key=lambda s: not s == "type")
+
+        for mod in mods:
+            # built-in modifiers
+            if mod == "text":
+                # strip html
+                txt = stripHTML(txt) if txt else ""
+            elif mod == "type":
+                # type answer field; convert it to [[type:...]] for the gui code
+                # to process
+                return "[[%s]]" % tag_name
+            elif mod.startswith("cq-") or mod.startswith("ca-"):
+                # cloze deletion
+                mod, extra = mod.split("-")
+                txt = self.clozeText(txt, extra, mod[1]) if txt and extra else ""
+            else:
+                # hook-based field modifier
+                m = re.search(r"^(.*?)(?:\((.*)\))?$", mod)
+                if not m:
+                    return "invalid field modifier " + mod
+                mod, extra = m.groups()
+                txt = runFilter(
+                    "fmod_" + mod, txt or "", extra or "", context, tag, tag_name
+                )
+                if txt is None:
+                    return "{unknown field %s}" % tag_name
+        return txt
+
+    @classmethod
+    def clozeText(cls, txt: str, ord: str, type: str) -> str:
+        """Processe the given Cloze deletion within the given template."""
+        reg = clozeReg
+        currentRegex = clozeReg % ord
+        if not re.search(currentRegex, txt):
+            # No Cloze deletion was found in txt.
+            return ""
+        txt = cls._removeFormattingFromMathjax(txt, ord)
+
+        def repl(m):
+            # replace chosen cloze with type
+            if type == "q":
+                if m.group(CLOZE_REGEX_MATCH_GROUP_HINT):
+                    buf = "[%s]" % m.group(CLOZE_REGEX_MATCH_GROUP_HINT)
+                else:
+                    buf = "[...]"
+            else:
+                buf = m.group(CLOZE_REGEX_MATCH_GROUP_CONTENT)
+            # uppercase = no formatting
+            if m.group(CLOZE_REGEX_MATCH_GROUP_TAG) == "c":
+                buf = "<span class=cloze>%s</span>" % buf
+            return buf
+
+        txt = re.sub(currentRegex, repl, txt)
+        # and display other clozes normally
+        return re.sub(reg % r"\d+", "\\2", txt)
+
+    @classmethod
+    def _removeFormattingFromMathjax(cls, txt, ord) -> str:
+        """Marks all clozes within MathJax to prevent formatting them.
+
+        Active Cloze deletions within MathJax should not be wrapped inside
+        a Cloze <span>, as that would interfere with MathJax.
+
+        This method finds all Cloze deletions number `ord` in `txt` which are
+        inside MathJax inline or display formulas, and replaces their opening
+        '{{c123' with a '{{C123'. The clozeText method interprets the upper-case
+        C as "don't wrap this Cloze in a <span>".
+        """
+        creg = clozeReg.replace("(?si)", "")
+
+        # Scan the string left to right.
+        # After a MathJax opening - \( or \[ - flip in_mathjax to True.
+        # After a MathJax closing - \) or \] - flip in_mathjax to False.
+        # When a Cloze pattern number `ord` is found and we are in MathJax,
+        # replace its '{{c' with '{{C'.
+        #
+        # TODO: Report mismatching opens/closes - e.g. '\(\]'
+        # TODO: Report errors in this method better than printing to stdout.
+        # flags in middle of expression deprecated
+        in_mathjax = False
+
+        def replace(match):
+            nonlocal in_mathjax
+            if match.group("mathjax_open"):
+                if in_mathjax:
+                    print("MathJax opening found while already in MathJax")
+                in_mathjax = True
+            elif match.group("mathjax_close"):
+                if not in_mathjax:
+                    print("MathJax close found while not in MathJax")
+                in_mathjax = False
+            elif match.group("cloze"):
+                if in_mathjax:
+                    return match.group(0).replace(
+                        "{{c{}::".format(ord), "{{C{}::".format(ord)
+                    )
+            else:
+                print("Unexpected: no expected capture group is present")
+            return match.group(0)
+
+        # The following regex matches one of:
+        #  -  MathJax opening
+        #  -  MathJax close
+        #  -  Cloze deletion number `ord`
+        return re.sub(
+            r"(?si)"
+            r"(?P<mathjax_open>\\[([])|"
+            r"(?P<mathjax_close>\\[\])])|"
+            r"(?P<cloze>" + (creg % ord) + ")",
+            replace,
+            txt,
+        )
+
+    @modifier("=")
+    def render_delimiter(self, tag_name=None, context=None) -> str:
+        """Changes the Mustache delimiter."""
+        try:
+            self.otag, self.ctag = tag_name.split(" ")
+        except ValueError:
+            # invalid
+            return ""
+        self.compile_regexps()
+        return ""

pylib/anki/template/view.py

@@ -0,0 +1,118 @@
+import os.path
+import re
+from typing import Any
+
+from .template import Template
+
+
+class View:
+    # Path where this view's template(s) live
+    template_path = "."
+
+    # Extension for templates
+    template_extension = "mustache"
+
+    # The name of this template. If none is given the View will try
+    # to infer it based on the class name.
+    template_name: str = None
+
+    # Absolute path to the template itself. Pystache will try to guess
+    # if it's not provided.
+    template_file: str = None
+
+    # Contents of the template.
+    template: str = None
+
+    # Character encoding of the template file. If None, Pystache will not
+    # do any decoding of the template.
+    template_encoding: str = None
+
+    def __init__(self, template=None, context=None, **kwargs) -> None:
+        self.template = template
+        self.context = context or {}
+
+        # If the context we're handed is a View, we want to inherit
+        # its settings.
+        if isinstance(context, View):
+            self.inherit_settings(context)
+
+        if kwargs:
+            self.context.update(kwargs)
+
+    def inherit_settings(self, view) -> None:
+        """Given another View, copies its settings."""
+        if view.template_path:
+            self.template_path = view.template_path
+
+        if view.template_name:
+            self.template_name = view.template_name
+
+    def load_template(self) -> Any:
+        if self.template:
+            return self.template
+
+        if self.template_file:
+            return self._load_template()
+
+        name = self.get_template_name() + "." + self.template_extension
+
+        if isinstance(self.template_path, str):
+            self.template_file = os.path.join(self.template_path, name)
+            return self._load_template()
+
+        for path in self.template_path:
+            self.template_file = os.path.join(path, name)
+            if os.path.exists(self.template_file):
+                return self._load_template()
+
+        raise IOError('"%s" not found in "%s"' % (name, ":".join(self.template_path),))
+
+    def _load_template(self) -> str:
+        f = open(self.template_file, "r")
+        try:
+            template = f.read()
+            if self.template_encoding and isinstance(template, bytes):
+                template = str(template, self.template_encoding)
+        finally:
+            f.close()
+        return template
+
+    def get_template_name(self, name=None) -> Any:
+        """TemplatePartial => template_partial
+        Takes a string but defaults to using the current class' name or
+        the `template_name` attribute
+        """
+        if self.template_name:
+            return self.template_name
+
+        if not name:
+            name = self.__class__.__name__
+
+        def repl(match):
+            return "_" + match.group(0).lower()
+
+        return re.sub("[A-Z]", repl, name)[1:]
+
+    def __contains__(self, needle) -> bool:
+        return needle in self.context or hasattr(self, needle)
+
+    def __getitem__(self, attr) -> Any:
+        val = self.get(attr, None)
+        if not val:
+            raise KeyError("No such key.")
+        return val
+
+    def get(self, attr, default) -> Any:
+        attr = self.context.get(attr, getattr(self, attr, default))
+
+        if hasattr(attr, "__call__"):
+            return attr()
+        else:
+            return attr
+
+    def render(self, encoding=None) -> str:
+        template = self.load_template()
+        return Template(template, self).render(encoding=encoding)
+
+    def __str__(self) -> str:
+        return self.render()

pylib/anki/template_legacy.py

@@ -1,202 +0,0 @@
-# Copyright: Ankitects Pty Ltd and contributors
-# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
-
-"""
-This file contains code that is no longer used by Anki, but left around
-for the benefit of add-ons. It may go away in the future, so please copy
-any routines you need into your own add-on instead of using them directly
-from this module.
-
-If your add-on was previously calling anki.template.render(), you now
-need to call anki.template.render_template(), passing col in as the first
-argument.
-"""
-
-from __future__ import annotations
-
-import re
-from typing import Any, Callable
-
-from anki.lang import _
-from anki.template import (
-    CLOZE_REGEX_MATCH_GROUP_CONTENT,
-    CLOZE_REGEX_MATCH_GROUP_HINT,
-    CLOZE_REGEX_MATCH_GROUP_TAG,
-    clozeReg,
-)
-from anki.utils import stripHTML
-
-# Cloze filter
-##########################################################################
-
-
-def _clozeText(txt: str, ord: str, type: str) -> str:
-    """Process the given Cloze deletion within the given template."""
-    reg = clozeReg
-    currentRegex = clozeReg % ord
-    if not re.search(currentRegex, txt):
-        # No Cloze deletion was found in txt.
-        return ""
-    txt = _removeFormattingFromMathjax(txt, ord)
-
-    def repl(m):
-        # replace chosen cloze with type
-        if type == "q":
-            if m.group(CLOZE_REGEX_MATCH_GROUP_HINT):
-                buf = "[%s]" % m.group(CLOZE_REGEX_MATCH_GROUP_HINT)
-            else:
-                buf = "[...]"
-        else:
-            buf = m.group(CLOZE_REGEX_MATCH_GROUP_CONTENT)
-        # uppercase = no formatting
-        if m.group(CLOZE_REGEX_MATCH_GROUP_TAG) == "c":
-            buf = "<span class=cloze>%s</span>" % buf
-        return buf
-
-    txt = re.sub(currentRegex, repl, txt)
-    # and display other clozes normally
-    return re.sub(reg % r"\d+", "\\2", txt)
-
-
-def _removeFormattingFromMathjax(txt, ord) -> str:
-    """Marks all clozes within MathJax to prevent formatting them.
-
-    Active Cloze deletions within MathJax should not be wrapped inside
-    a Cloze <span>, as that would interfere with MathJax.
-
-    This method finds all Cloze deletions number `ord` in `txt` which are
-    inside MathJax inline or display formulas, and replaces their opening
-    '{{c123' with a '{{C123'. The clozeText method interprets the upper-case
-    C as "don't wrap this Cloze in a <span>".
-    """
-    creg = clozeReg.replace("(?si)", "")
-
-    # Scan the string left to right.
-    # After a MathJax opening - \( or \[ - flip in_mathjax to True.
-    # After a MathJax closing - \) or \] - flip in_mathjax to False.
-    # When a Cloze pattern number `ord` is found and we are in MathJax,
-    # replace its '{{c' with '{{C'.
-    #
-    # TODO: Report mismatching opens/closes - e.g. '\(\]'
-    # TODO: Report errors in this method better than printing to stdout.
-    # flags in middle of expression deprecated
-    in_mathjax = False
-
-    def replace(match):
-        nonlocal in_mathjax
-        if match.group("mathjax_open"):
-            if in_mathjax:
-                print("MathJax opening found while already in MathJax")
-            in_mathjax = True
-        elif match.group("mathjax_close"):
-            if not in_mathjax:
-                print("MathJax close found while not in MathJax")
-            in_mathjax = False
-        elif match.group("cloze"):
-            if in_mathjax:
-                return match.group(0).replace(
-                    "{{c{}::".format(ord), "{{C{}::".format(ord)
-                )
-        else:
-            print("Unexpected: no expected capture group is present")
-        return match.group(0)
-
-    # The following regex matches one of:
-    #  -  MathJax opening
-    #  -  MathJax close
-    #  -  Cloze deletion number `ord`
-    return re.sub(
-        r"(?si)"
-        r"(?P<mathjax_open>\\[([])|"
-        r"(?P<mathjax_close>\\[\])])|"
-        r"(?P<cloze>" + (creg % ord) + ")",
-        replace,
-        txt,
-    )
-
-
-def _cloze_filter(field_text: str, filter_args: str, q_or_a: str):
-    return _clozeText(field_text, filter_args, q_or_a)
-
-
-def cloze_qfilter(field_text: str, filter_args: str, *args):
-    return _cloze_filter(field_text, filter_args, "q")
-
-
-def cloze_afilter(field_text: str, filter_args: str, *args):
-    return _cloze_filter(field_text, filter_args, "a")
-
-
-# addHook("fmod_cq", cloze_qfilter)
-# addHook("fmod_ca", cloze_afilter)
-
-# Other filters
-##########################################################################
-
-
-def hint_filter(txt: str, args, context, tag: str, fullname) -> str:
-    if not txt.strip():
-        return ""
-    # random id
-    domid = "hint%d" % id(txt)
-    return """
-<a class=hint href="#"
-onclick="this.style.display='none';document.getElementById('%s').style.display='block';return false;">
-%s</a><div id="%s" class=hint style="display: none">%s</div>
-""" % (
-        domid,
-        _("Show %s") % tag,
-        domid,
-        txt,
-    )
-
-
-FURIGANA_RE = r" ?([^ >]+?)\[(.+?)\]"
-RUBY_REPL = r"<ruby><rb>\1</rb><rt>\2</rt></ruby>"
-
-
-def replace_if_not_audio(repl: str) -> Callable[[Any], Any]:
-    def func(match):
-        if match.group(2).startswith("sound:"):
-            # return without modification
-            return match.group(0)
-        else:
-            return re.sub(FURIGANA_RE, repl, match.group(0))
-
-    return func
-
-
-def without_nbsp(s: str) -> str:
-    return s.replace("&nbsp;", " ")
-
-
-def kanji_filter(txt: str, *args) -> str:
-    return re.sub(FURIGANA_RE, replace_if_not_audio(r"\1"), without_nbsp(txt))
-
-
-def kana_filter(txt: str, *args) -> str:
-    return re.sub(FURIGANA_RE, replace_if_not_audio(r"\2"), without_nbsp(txt))
-
-
-def furigana_filter(txt: str, *args) -> str:
-    return re.sub(FURIGANA_RE, replace_if_not_audio(RUBY_REPL), without_nbsp(txt))
-
-
-def text_filter(txt: str, *args) -> str:
-    return stripHTML(txt)
-
-
-def type_answer_filter(txt: str, filter_args: str, context, tag: str, dummy) -> str:
-    # convert it to [[type:...]] for the gui code to process
-    if filter_args:
-        return f"[[type:{filter_args}:{tag}]]"
-    else:
-        return f"[[type:{tag}]]"
-
-
-# addHook("fmod_text", text_filter)
-# addHook("fmod_type", type_answer_filter)
-# addHook("fmod_hint", hint_filter)
-# addHook("fmod_kanji", kanji_filter)
-# addHook("fmod_kana", kana_filter)
-# addHook("fmod_furigana", furigana_filter)

pylib/tests/test_models.py

@@ -1,6 +1,7 @@
 # coding: utf-8
 import time
 
+import anki.template
 from anki.consts import MODEL_CLOZE
 from anki.utils import isWin, joinFields, stripHTML
 from tests.shared import getEmptyCol
@@ -219,18 +220,6 @@ def test_cloze_mathjax():
     )
 
 
-def test_typecloze():
-    d = getEmptyCol()
-    m = d.models.byName("Cloze")
-    d.models.setCurrent(m)
-    m["tmpls"][0]["qfmt"] = "{{type:cloze:Text}}"
-    d.models.save(m)
-    f = d.newNote()
-    f["Text"] = "hello {{c1::world}}"
-    d.addNote(f)
-    assert "[[type:cloze:Text]]" in f.cards()[0].q()
-
-
 def test_chained_mods():
     d = getEmptyCol()
     d.models.setCurrent(d.models.byName("Cloze"))
@@ -349,6 +338,15 @@ def test_modelChange():
     assert deck.db.scalar("select count() from cards where nid = ?", f.id) == 1
 
 
+def test_templates2():
+    d = dict(Foo="x", Bar="y")
+    assert anki.template.render("{{Foo}}", d) == "x"
+    assert anki.template.render("{{#Foo}}{{Foo}}{{/Foo}}", d) == "x"
+    assert anki.template.render("{{#Foo}}{{Foo}}{{/Foo}}", d) == "x"
+    assert anki.template.render("{{#Bar}}{{#Foo}}{{Foo}}{{/Foo}}{{/Bar}}", d) == "x"
+    assert anki.template.render("{{#Baz}}{{#Foo}}{{Foo}}{{/Foo}}{{/Baz}}", d) == ""
+
+
 def test_availOrds():
     d = getEmptyCol()
     m = d.models.current()

pylib/tests/test_template.py

@@ -1,8 +1,9 @@
-from anki.template_legacy import _removeFormattingFromMathjax
+from anki.template import Template
 
 
 def test_remove_formatting_from_mathjax():
-    assert _removeFormattingFromMathjax(r"\(2^{{c3::2}}\)", 3) == r"\(2^{{C3::2}}\)"
+    t = Template("")
+    assert t._removeFormattingFromMathjax(r"\(2^{{c3::2}}\)", 3) == r"\(2^{{C3::2}}\)"
 
     txt = (
         r"{{c1::ok}} \(2^2\) {{c2::not ok}} \(2^{{c3::2}}\) \(x^3\) "
@@ -10,7 +11,9 @@ def test_remove_formatting_from_mathjax():
     )
     # Cloze 2 is not in MathJax, so it should not get protected against
     # formatting.
-    assert _removeFormattingFromMathjax(txt, 2) == txt
+    assert t._removeFormattingFromMathjax(txt, 2) == txt
 
     txt = r"\(a\) {{c1::b}} \[ {{c1::c}} \]"
-    assert _removeFormattingFromMathjax(txt, 1) == (r"\(a\) {{c1::b}} \[ {{C1::c}} \]")
+    assert t._removeFormattingFromMathjax(txt, 1) == (
+        r"\(a\) {{c1::b}} \[ {{C1::c}} \]"
+    )