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import { Position, TextDocumentContentChangeEvent, TextEditor, TextLine, workspace } from "vscode";
import { Config, ConfigType } from "../Config";
import Generator from "../DocGen/CGen";
import { IDocGen } from "../DocGen/DocGen";
import ICodeParser from "./CodeParser";
/**
*
* Parses C code for methods and signatures
*
* @export
* @class CParser
* @implements {ICodeParser}
*/
export default class CParser implements ICodeParser {
protected activeEditor: TextEditor;
protected activeSelection: Position;
/**
* @inheritdoc
*/
public Parse(activeEdit: TextEditor, event: TextDocumentContentChangeEvent): IDocGen {
this.activeEditor = activeEdit;
this.activeSelection = this.activeEditor.selection.active;
const activeLine: TextLine = this.activeEditor.document.lineAt(this.activeEditor.selection.active.line);
const method: string = this.getMethodText();
// Not a method
if (method.length === 0) {
return null;
}
const returnValue: string[] = this.getReturn(method);
const params: string[] = this.getParams(method);
const cppGenerator: IDocGen = new Generator(this.activeEditor, this.activeSelection, params, returnValue);
return cppGenerator;
}
/***************************************************************************
Implementation
***************************************************************************/
protected getMethodText(): string {
let method: string = "";
let nextLine: Position = new Position(this.activeSelection.line + 1, this.activeSelection.character);
let nextLineTxt: string = this.activeEditor.document.lineAt(nextLine.line).text.trim();
// VSCode may enter a * on itself, we don't want that in our method
if (nextLineTxt === "*") {
nextLineTxt = "";
}
while (nextLineTxt.length === 0) { // Get first method line
nextLine = new Position(nextLine.line + 1, nextLine.character);
nextLineTxt = this.activeEditor.document.lineAt(nextLine.line).text.trim();
}
method += nextLineTxt;
// Get method end line
while (nextLineTxt.indexOf(")") === -1 &&
(nextLineTxt.indexOf(";") === -1 || nextLineTxt.indexOf("}") === -1)) { // Check for method end
nextLine = new Position(nextLine.line + 1, nextLine.character);
nextLineTxt = this.activeEditor.document.lineAt(nextLine.line).text.trim();
method += " " + nextLineTxt;
}
// Not a method but some code in the file
if (method.indexOf(")") === -1) {
return "";
}
return method;
}
protected getReturn(method: string): string[] {
const retVals: string[] = [];
// Remove the compiler keywords from the signature
const sign: string = method.replace(/(static)|(inline)|(friend)|(virtual)|(extern)|(explicit)/g, "");
// Remove the parameters from the signature
const returnSignature = sign.slice(0, sign.indexOf("(")).trim();
if (returnSignature.indexOf(" ") === -1) { // Constructor or similar
return retVals;
}
const returnType: string = returnSignature.substr(0, returnSignature.lastIndexOf(" "));
switch (returnType) {
case "bool":
retVals.push("true");
retVals.push("false");
break;
case "void":
break;
default:
retVals.push(returnType);
break;
}
// Don't generate return type if the user doesn't wish to do it
if (!workspace.getConfiguration(ConfigType.generic).get<boolean>(Config.generateReturnType, true) &&
retVals.length > 0) {
retVals.length = 0;
retVals.push(" ");
return retVals;
}
return retVals;
}
protected getParams(method: string): string[] {
const params: string[] = [];
// Get parameters from enclosing brackets
const parameters: string = method.slice(method.indexOf("(")) // Get opening bracket
.slice(1, method.indexOf(")")) // Remove opening bracket
.split(")")[0]; // Get closing bracket
if (parameters.length === 0) { // No parameters
return params;
}
let paramArr: string[] = parameters.split(",");
paramArr = paramArr.map((item: string) => {
// Remove any special C++ characters
const clean: string = item.trim().replace(/[&*\[\]]/g, "");
return clean.split(" ").pop();
});
return paramArr;
}
}
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