signature help

blh · April 5, 2023, 12:52am

Does @codemirror/autocomplete implement support for signature help?

For example, in VSCode, signature help looks like:

marijn · April 5, 2023, 7:37am

No, but it should be possible to use addToOptions to implement something like this.

blh · June 26, 2023, 12:04am

Realized Chrome DevTools has a good example on how to build this feature!

github.com

ChromeDevTools/devtools-frontend/blob/68ead267f2b342b5488b73a73660ca2d040071f6/front_end/ui/components/text_editor/javascript.ts#L477


      
              return true;
            }
            const description = result.exceptionDetails.exception.description;
            if (description) {
              return !description.startsWith('SyntaxError: Unexpected end of input') &&
                  !description.startsWith('SyntaxError: Unterminated template literal');
            }
            return false;
          }
          
          
export function argumentHints(): ArgumentHintsTooltip {
            return cursorTooltip(getArgumentHints);
          }
          
          
export function closeArgumentsHintsTooltip(
              view: CodeMirror.EditorView, tooltip: CodeMirror.StateField<CodeMirror.Tooltip|null>): boolean {
            // If the tooltip is currently showing, the state will reflect its properties.
            // If it isn't showing, the state is explicitly set to `null`.
            if (view.state.field(tooltip) === null) {
              return false;
            }

Look for “argumentHints” in the codebase.