Parse position or selection from link fragment

plugin/core/open.py

@@ -4,15 +4,58 @@
 from .protocol import DocumentUri
 from .protocol import Range
 from .protocol import RangeLsp
+from .protocol import UINT_MAX
 from .typing import Dict, Tuple, Optional
 from .url import parse_uri
 from .views import range_to_region
+from urllib.parse import unquote, urlparse
 import os
+import re
 import sublime
 import subprocess
+import webbrowser
 
 
 opening_files = {}  # type: Dict[str, Tuple[Promise[Optional[sublime.View]], ResolveFunc[Optional[sublime.View]]]]
+FRAGMENT_PATTERN = re.compile(r'^L?(\d+)(?:,(\d+))?(?:-L?(\d+)(?:,(\d+))?)?')
+
+
+def open_file_uri(
+    window: sublime.Window, uri: DocumentUri, flags: int = 0, group: int = -1
+) -> Promise[Optional[sublime.View]]:
+
+    def parse_fragment(fragment: str) -> RangeLsp:
+        match = FRAGMENT_PATTERN.match(fragment)
+        selection = {'start': {'line': 0, 'character': 0}, 'end': {'line': 0, 'character': 0}}  # type: RangeLsp
+        if match:
+            # Line and column numbers in the fragment are assumed to be 1-based and need to be converted to 0-based
+            # numbers for the LSP Position structure.
+            start_line, start_column, end_line, end_column = [max(0, int(g) - 1) if g else None for g in match.groups()]
+            if start_line:
+                selection['start']['line'] = start_line
+                selection['end']['line'] = start_line
+            if start_column:
+                selection['start']['character'] = start_column
+                selection['end']['character'] = start_column
+            if end_line:
+                selection['end']['line'] = end_line
+                selection['end']['character'] = UINT_MAX
+            if end_column:
+                selection['end']['character'] = end_column
+        return selection
+
+    decoded_uri = unquote(uri)  # decode percent-encoded characters
+    parsed = urlparse(decoded_uri)
+    open_promise = open_file(window, decoded_uri, flags, group)
+    if parsed.fragment:
+        return open_promise.then(lambda view: _select_and_center(view, parse_fragment(parsed.fragment)))
+    return open_promise
+
+
+def _select_and_center(view: Optional[sublime.View], r: RangeLsp) -> Optional[sublime.View]:
+    if view:
+        return center_selection(view, r)
+    return None
 
 
 def _return_existing_view(flags: int, existing_view_group: int, active_group: int, specified_group: int) -> bool:
@@ -78,6 +121,14 @@ def center_selection(v: sublime.View, r: RangeLsp) -> sublime.View:
     return v
 
 
+def open_in_browser(uri: str) -> None:
+    # NOTE: Remove this check when on py3.8.
+    if not uri.lower().startswith(("http://", "https://")):
+        uri = "https://" + uri
+    if not webbrowser.open(uri):
+        sublime.status_message("failed to open: " + uri)
+
+
 def open_externally(uri: str, take_focus: bool) -> bool:
     """
     A blocking function that invokes the OS's "open with default extension"

plugin/core/url.py

@@ -52,6 +52,7 @@ def parse_uri(uri: str) -> Tuple[str, str]:
         if os.name == 'nt':
             netloc = url2pathname(parsed.netloc)
             path = path.lstrip("\\")
+            path = re.sub(r"^/([a-zA-Z]:)", r"\1", path)  # remove slash preceding drive letter
             path = re.sub(r"^([a-z]):", _uppercase_driveletter, path)
             if netloc:
                 # Convert to UNC path

plugin/document_link.py

@@ -1,12 +1,11 @@
 from .core.logging import debug
+from .core.open import open_file_uri
+from .core.open import open_in_browser
 from .core.protocol import DocumentLink, Request
 from .core.registry import get_position
 from .core.registry import LspTextCommand
 from .core.typing import Optional
-from urllib.parse import unquote, urlparse
-import re
 import sublime
-import webbrowser
 
 
 class LspOpenLinkCommand(LspTextCommand):
@@ -57,15 +56,6 @@ def open_target(self, target: str) -> None:
         if target.startswith("file:"):
             window = self.view.window()
             if window:
-                decoded = unquote(target)  # decode percent-encoded characters
-                parsed = urlparse(decoded)
-                filepath = parsed.path
-                if sublime.platform() == "windows":
-                    filepath = re.sub(r"^/([a-zA-Z]:)", r"\1", filepath)  # remove slash preceding drive letter
-                fn = "{}:{}".format(filepath, parsed.fragment) if parsed.fragment else filepath
-                window.open_file(fn, flags=sublime.ENCODED_POSITION)
+                open_file_uri(window, target)
         else:
-            if not (target.lower().startswith("http://") or target.lower().startswith("https://")):
-                target = "http://" + target
-            if not webbrowser.open(target):
-                sublime.status_message("failed to open: " + target)
+            open_in_browser(target)

plugin/hover.py

@@ -1,6 +1,7 @@
 from .code_actions import actions_manager
 from .code_actions import CodeActionOrCommand
-from .core.logging import debug
+from .core.open import open_file_uri
+from .core.open import open_in_browser
 from .core.promise import Promise
 from .core.protocol import Diagnostic
 from .core.protocol import DocumentLink
@@ -37,12 +38,9 @@
 from .core.views import unpack_href_location
 from .core.views import update_lsp_popup
 from .session_view import HOVER_HIGHLIGHT_KEY
-from urllib.parse import unquote, urlparse
 import functools
 import html
-import re
 import sublime
-import webbrowser
 
 
 SUBLIME_WORD_MASK = 515
@@ -330,13 +328,7 @@ def _on_navigate(self, href: str, point: int) -> None:
         elif href.startswith("file:"):
             window = self.view.window()
             if window:
-                decoded = unquote(href)  # decode percent-encoded characters
-                parsed = urlparse(decoded)
-                filepath = parsed.path
-                if sublime.platform() == "windows":
-                    filepath = re.sub(r"^/([a-zA-Z]:)", r"\1", filepath)  # remove slash preceding drive letter
-                fn = "{}:{}".format(filepath, parsed.fragment) if parsed.fragment else filepath
-                window.open_file(fn, flags=sublime.ENCODED_POSITION)
+                open_file_uri(window, href)
         elif href.startswith('code-actions:'):
             _, config_name = href.split(":")
             actions = self._actions_by_config[config_name]
@@ -360,11 +352,7 @@ def _on_navigate(self, href: str, point: int) -> None:
                 r = {"start": position, "end": position}  # type: RangeLsp
                 sublime.set_timeout_async(functools.partial(session.open_uri_async, uri, r))
         else:
-            # NOTE: Remove this check when on py3.8.
-            if not (href.lower().startswith("http://") or href.lower().startswith("https://")):
-                href = "http://" + href
-            if not webbrowser.open(href):
-                debug("failed to open:", href)
+            open_in_browser(href)
 
     def handle_code_action_select(self, config_name: str, index: int) -> None:
         if index > -1: