add named destination support

thanks typst contributors for adding this in v0.11.0

README.md

@@ -47,10 +47,13 @@ or add the following to your `.config/zathura/zathurarc`:
 ```
 map <C-l> exec copy_ref
 map <C-g> exec "copy_ref --section"
+map <C-k> exec "copy_ref --destination"
 ```
 
 This will make Ctrl-L copy a reference to the current page,
-and Ctrl-G copy a reference to a specific section in Zathura.
+Ctrl-G copy a reference to a specific section title,
+and Ctrl-K copy a reference to a [named destination](https://tex.stackexchange.com/questions/213860/how-to-generate-a-named-destination-in-pdf).
+Destinations and sections will show up in a rofi menu for you to select.
 
 ## limitations
 
@@ -66,5 +69,5 @@ and I can not make any guarantees.
 Also:
 - Section references are unreliable because titles might change,
   and there might be sections with the same title.
-  Proper IDs for bookmarks are possible,
-  but not until Typst resolves [issue #1352](https://github.com/typst/typst/issues/1352).
+  Use named destinations for documents that you built yourself (e.g. using Typst, LaTeX), and page numbers for external documents.
+  Only use section title references if your type-setting system does not support named destinations.

copy_ref

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-from pdf_data import get_page_pdf, get_section_pdf
+from pdf_data import get_destination_pdf, get_page_pdf, get_section_pdf
 from datatypes import *
 from enum import Enum, auto
 from util import notify
@@ -9,7 +9,9 @@ import argparse
 import formatter.typst as typst_fmt
 
 parser = argparse.ArgumentParser()
-parser.add_argument("--section", help="Copy reference to the section title instead of the page number.", action="store_true")
+dest_group = parser.add_mutually_exclusive_group()
+dest_group.add_argument("--section", help="Copy reference to the section title instead of the page number.", action="store_true")
+dest_group.add_argument("--destination", help="Copy reference to a named destination instead of the page number.", action="store_true")
 
 
 class LinkFormat(Enum):
@@ -37,6 +39,8 @@ if __name__ == "__main__":
 
     if args.section:
         ref = get_section_pdf()
+    elif args.destination:
+        ref = get_destination_pdf()
     else:
         ref = get_page_pdf()
 
@@ -48,3 +52,5 @@ if __name__ == "__main__":
             notify("Copied ref", f"{ref.filepath.name} p. {ref.page}")
         case PDFSection():
             notify("Copied ref", f"{ref.filepath.name} sec. {ref.title}")
+        case PDFDestination():
+            notify("Copied ref", f"{ref.filepath.name} {ref.name}")

datatypes.py

@@ -1,4 +1,4 @@
-from typing import NewType, Union
+from typing import NewType, TypedDict, Union
 from pathlib import Path
 from dataclasses import dataclass
 
@@ -60,15 +60,33 @@ class PDFSection(_PDFReference):
     title: SectionTitle
 
 
-PDFReference = Union[PDFPage, PDFSection]
+@dataclass
+class PDFDestination(_PDFReference):
+    """Reference to a named destination in a PDF.
+
+    Attributes
+    ----------
+    name
+        Destination name.
+    """
+
+    name: str
+
+
+PDFReference = Union[PDFPage, PDFSection, PDFDestination]
 # for now no other format is implemented
 # replace this with an union if that happens
 Reference = PDFReference
 
 
-# PyMuPDF type
+# PyMuPDF types
 @dataclass
 class FitzBookmark:
     level: int
     title: SectionTitle
     page: PageNumber
+
+class FitzDestinations(TypedDict):
+    page: PageNumber
+    to: tuple[int, int]
+    zoom: float

formatter/typst.py

@@ -1,6 +1,6 @@
 from os import environ
 from urllib.parse import urlencode
-from datatypes import PDFPage, PDFSection, PDFReference, Reference
+from datatypes import PDFDestination, PDFPage, PDFSection, PDFReference, Reference
 from typing import assert_never
 from pathlib import Path
 
@@ -28,6 +28,8 @@ def format_pdf_link(ref: PDFReference) -> str:
         case PDFSection():
             params["section"] = ref.title
             default_label = ref.title
+        case PDFDestination():
+            params["destination"] = ref.name
         case _ as obj:
             assert_never(obj)
 

pdf_data.py

@@ -16,9 +16,23 @@ def get_section_pdf() -> PDFSection:
         rofi_res = rofi([f"{x.title}" for x in page_headers], prompt="Select header: ")
         if rofi_res is None or rofi_res.index is None:
             raise RuntimeError("No header was selected.")
-        selected_header = page_headers[rofi_res.index]
+        else:
+            selected_header = page_headers[rofi_res.index]
+            return PDFSection(filepath=page_ref.filepath, title=selected_header.title)
 
-        return PDFSection(filepath=page_ref.filepath, title=selected_header.title)
+
+def get_destination_pdf() -> PDFDestination:
+    page_ref: PDFPage = get_page_pdf()
+    with fitz.Document(page_ref.filepath) as doc:
+        destinations = cast(FitzDestinations, cast(Any, doc).resolve_names())
+        page_dests = {k: x for k, x in destinations.items() if cast(Any, x)["page"]+1 == page_ref.page}
+
+        rofi_res = rofi([f"{k}" for k, _ in page_dests.items()], prompt="Select named destination: ")
+        if rofi_res is None or rofi_res.index is None:
+            raise RuntimeError("No destination was selected.")
+        else:
+            selected_header = [x for x in page_dests.items()][rofi_res.index]
+            return PDFDestination(filepath=page_ref.filepath, name=selected_header[0])
 
 
 def get_page_pdf() -> PDFPage:

pdfref_handler

@@ -14,6 +14,7 @@ query = parse_qs(url.query)
 
 page: PageNumber = PageNumber(int(query.get("page", ["0"])[0]))
 section_list = query.get("section", [])
+destination_list = query.get("destination", [])
 
 if section_list != []:
     section: SectionTitle = SectionTitle(section_list[0])
@@ -25,8 +26,16 @@ if section_list != []:
         else:
             if len(headers) > 1:
                 notify("", f"Multiple sections '{section}' found: page might be incorrect")
-
             page = headers[0].page
+elif destination_list != []:
+    destination_name = destination_list[0]
+    with fitz.Document(url.path) as doc:
+        destinations = FitzDestinations(cast(Any, doc).resolve_names())
+        destination = destinations.get(destination_name)
+        if not destination:
+            notify("", f"Failed to find named destination '{destination_name}': did the document change?")
+        else:
+            page = destination["page"]+1
 
 
 subprocess.run(["zathura", "--page", str(page), url.path], text=True)