218 lines
10 KiB
TypeScript
218 lines
10 KiB
TypeScript
/**
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* completion.ts
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*
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* @author CismonX <admin@cismon.net>
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* @license MIT
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*/
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import * as vscode from 'vscode';
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/**
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* Provide code completion info for Texinfo source code.
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*/
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export class CompletionItemProvider implements vscode.CompletionItemProvider {
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/**
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* Full list of completion items.
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*
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* Excerpted from the {@link https://www.gnu.org/software/texinfo/manual/texinfo GNU Texinfo manual},
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* which is licensed under the GNU Free Documentation License.
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*/
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private readonly completionItems = <vscode.CompletionItem[]> [
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command('ampchar', 'Insert an ampersand, "&"', { hasEmptyArguments: true }),
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command('atchar', 'Insert an at sign, "@"', { hasEmptyArguments: true }),
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command('backslashchar', 'Insert a blackslash, "\\"', { hasEmptyArguments: true }),
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command('lbracechar', 'Insert a left brace, "{"', { hasEmptyArguments: true }),
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command('rbracechar', 'Insert a right brace, "{"', { hasEmptyArguments: true }),
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command('AA', 'Generate the uppercase Scandinavian A-ring letter, "Å"', { hasEmptyArguments: true }),
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command('aa', 'Generate the lowercase Scandinavian A-ring letter, "å"', { hasEmptyArguments: true }),
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...braceCommand('abbr', 'Indicate a general abbreviation', 1, 'abbreviation', 'meaning'),
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...braceCommand('acronym', 'Indicate an acronym in all capital letters', 1, 'acronym', 'meaning'),
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command('AE', 'Generate the uppercase AE ligatures, "Æ"', { hasEmptyArguments: true }),
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command('ae', 'Generate the lowercase AE ligatures, "æ"', { hasEmptyArguments: true }),
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command('afivepaper', 'Change page dimensions for the A5 paper size'),
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command('afourlatex', 'Change page dimensions for the A4 paper size'),
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command('afourpaper', 'Change page dimensions for the A4 paper size'),
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command('afourwide', 'Change page dimensions for the A4 paper size'),
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snippet('alias', 'alias', 'Defines a new command to be just like an existing one', 0, '@alias new=existing',
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'alias ${1:new}=${2:existing}'),
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command('alias', 'Defines a new command to be just like an existing one', { sortOrder: 1 }),
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...lineCommandEnum('allowcodebreaks', 'Control breaking at "-" and "_" in TeX', 'true', 'false'),
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...braceCommand('anchor', 'Define current location for use as a cross-reference target', 1, 'name'),
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command('appendix', 'Begin an appendix'),
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command('appendixsec', 'Begin an appendix section within an appendix'),
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command('appendixsection', 'Begin an appendix section within an appendix'),
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command('appendixsubsec', 'Begin an appendix subsection'),
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command('appendixsubsubsec', 'Begin an appendix subsubsection'),
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command('arrow', 'Generate a right arrow glyph, "→"', { hasEmptyArguments: true }),
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command('asis', 'Print the table’s first column without highlighting'),
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command('author', 'Set the names of the author(s)'),
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...braceCommand('b', 'Set text in a bold font', 1, 'text'),
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...blockCommand('copying', 'Declare copying permissions'),
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command('bullet', 'Generate a large round dot, "•"', { hasEmptyArguments: true }),
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command('bye', 'stop formatting'),
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command('c', 'Begin a line comment'),
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snippet('header', 'c', 'Declare header block', 1, '@c %**start of header\n\n@c %**end of header',
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'c %**${1:start of header}\n$2\n@c %**${3:end of header}'),
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...braceCommand('caption', 'Define the full caption for a @float', 1, 'definition'),
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...blockCommand('cartouche', 'Highlight by drawing a box with rounded corners around it'),
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command('center', 'Center the line of text following the command'),
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command('centerchap', 'Like @chapter, but centers the chapter title'),
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command('chapheading', 'Print an unnumbered chapter-like heading, but omit from the table of contents'),
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command('chapter', 'Begin a numbered chapter'),
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command('cindex', 'Add entry to the index of concepts'),
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...braceCommand('cite', 'Highlight the name of a reference', 1, 'reference'),
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command('clear', 'Unset flag'),
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command('click', 'Represent a single "click" in a GUI', { hasEmptyArguments: true }),
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...braceCommand('clicksequence', 'Represent a sequence of clicks in a GUI', 1, 'actions'),
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command('clickstyle', 'Execute command on each @click'),
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...braceCommand('code', 'Indicate text which is a piece of code', 0, 'sample-code'),
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...lineCommandEnum('codequotebacktick', 'Control output of "`" in code examples', 'on', 'off'),
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...lineCommandEnum('codequoteundirected', 'Control output of "\'" in code examples', 'on', 'off'),
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command('comma', 'Insert a comma character, ","', { hasEmptyArguments: true }),
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...braceCommand('command', 'Indicate a command name', 1, 'command-name'),
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command('comment', 'Begin a line comment'),
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command('contents', "Print a complete table of contents."),
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...blockCommand('copying', 'Specify copyright holders and copying conditions'),
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command('copyright', 'The copyright symbol, "©"', { hasEmptyArguments: true }),
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command('setfilename', 'Set output file name'),
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command('settitle', 'Set document title'),
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command('insertcopying', 'Include permissions text'),
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...blockCommand('titlepage', 'Declare title page'),
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];
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provideCompletionItems(
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document: vscode.TextDocument,
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position: vscode.Position,
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token: vscode.CancellationToken,
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context: vscode.CompletionContext,
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) {
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if (context.triggerKind === vscode.CompletionTriggerKind.Invoke) {
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const wordRange = document.getWordRangeAtPosition(position);
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if (wordRange === undefined) {
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return undefined;
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}
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position = wordRange.start;
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if (document.getText(new vscode.Range(position.translate(0, -1), position)) !== '@') {
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return undefined;
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}
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}
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if (position.character === 1) {
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return this.completionItems;
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}
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if (document.getText(new vscode.Range(position.translate(0, -2), position.translate(0, -1))) === '@') {
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// The '@' character is escaped.
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return undefined;
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} else {
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return this.completionItems;
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}
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}
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}
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/**
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* Build the completion item for a Texinfo command.
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*
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* @param name The command name.
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* @param detail The command description.
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* @param extraArgs Extra arguments.
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*/
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function command(name: string, detail: string, extraArgs?: {
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/**
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* Sort order for this completion item when names collide.
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*/
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sortOrder?: number,
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/**
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* Whether this command takes no arguments and braces are required.
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*/
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hasEmptyArguments?: boolean,
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}): vscode.CompletionItem {
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return {
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label: '@' + name,
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kind: vscode.CompletionItemKind.Function,
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detail: detail,
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sortText: name + (extraArgs?.sortOrder?.toString() ?? ''),
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filterText: name,
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insertText: name + (extraArgs?.hasEmptyArguments ? '{}' : ''),
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};
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}
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function blockCommand(name: string, detail: string) {
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return [blockSnippet(name, detail), command(name, detail, { sortOrder: 1 })];
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}
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function braceCommand(name: string, detail: string, numArgsRequired: number, ...args: string[]) {
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return [commandSnippet(name, detail, numArgsRequired, ...args), command(name, detail, { sortOrder: 1 })];
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}
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function lineCommandEnum(name: string, detail: string, ...items: string[]) {
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return [
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snippet(name, name, detail, 0, `@${name} ${items.join('/')}`, `${name} \${1|${items.join(',')}|}`),
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command(name, detail, { sortOrder: 1}),
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];
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}
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/**
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* Build the completion item for a snippet of a command (with arguments).
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*
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* @param name The command name.
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* @param detail The command description.
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* @param numArgsRequired Number of required arguments.
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* @param args Argument names.
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*/
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function commandSnippet(name: string, detail: string, numArgsRequired: number, ...args: string[]) {
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const documentation = `@${name}{${args.map((arg, idx) => idx < numArgsRequired ? arg : '?' + arg).join(', ')}}`;
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const optionalArgs = args.splice(numArgsRequired).map((arg, idx) => `\${${numArgsRequired + idx + 2}:${arg}}`);
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const requiredArgs = args.map((arg, idx) => `\${${idx + 1}:${arg}}`);
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const optionalText = optionalArgs.length === 0 ? '' : `\${${numArgsRequired + 1}:, ${optionalArgs.join(', ')}}`;
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const insertText = `${name}{${requiredArgs.join(', ')}${optionalText}}`;
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return snippet(name, name, detail, 0, documentation, insertText);
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}
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/**
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* Build the completion item for a snippet of a block.
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*
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* @param name The snippet name.
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* @param detail The snippet description.
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*/
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function blockSnippet(name: string, detail: string) {
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return snippet(name, name, detail, 0, `@${name}\n\n@end ${name}`, `${name}\n$1\n@end ${name}`);
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}
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/**
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* Build the completion item for a generic snippet.
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*
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* @param label The string showing up in the completion list.
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* @param keyword The word typed by the user.
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* @param detail The snippet description.
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* @param sortOrder Sort order for this completion item when names collide.
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* @param documentation The Markdown documentation for this snippet.
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* @param insertText The text to replace current word when the item is selected.
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*/
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function snippet(
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label: string,
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keyword: string,
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detail: string,
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sortOrder: number,
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documentation: string,
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insertText: string,
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): vscode.CompletionItem {
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return {
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label: label,
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kind: vscode.CompletionItemKind.Snippet,
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detail: detail + ' (snippet)',
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documentation: snippetDocumentation(documentation),
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sortText: keyword + sortOrder.toString(),
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filterText: keyword,
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insertText: new vscode.SnippetString(insertText),
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};
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}
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/**
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* Wraps Texinfo snippet code into a Markdown code block for documentation.
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*
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* @param snippet The snippet code
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*/
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function snippetDocumentation(snippet: string) {
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return new vscode.MarkdownString('```texinfo\n' + snippet + '\n```');
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}
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