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Changed leading spaces logic

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Added new logic to pl.Lexer to find number of leading spaces by either arithmetic or by finding the index position of the first non-whitespace character. Also added a boolean flag to switch easily between the two methods using ternary logic. Added comments explaining functionality. Fixed code spacing to be more uniform in style.
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tel0065 2022-03-24 04:01:24 -05:00 committed by GitHub
parent 3525963bb0
commit d8c923e13c
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1 changed files with 70 additions and 10 deletions
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78
src/commands/text.ts
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@ -1,8 +1,10 @@
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.textCommands = void 0;
const vscode = require("vscode");
const pl = require("../pylex");
exports.textCommands = [
{
name: 'mind-reader.getLineNumber',
@ -25,6 +27,7 @@ exports.textCommands = [
callback: runCursorContext
}
];
/* Helper Function
* This function returns the line number of the active text editor window
*/
@ -32,6 +35,13 @@ function fetchLineNumber(editor) {
return editor.selection.active.line + 1;
}
/* Helper Function
* This function returns the text from the current line of the active text editor window
*/
function fetchTextLine(editor) {
return editor.document.lineAt(fetchLineNumber(editor) - 1);
}
// Function that outputs the current line number the cursor is on
function getLineNumber() {
let editor = vscode.window.activeTextEditor;
@ -47,9 +57,11 @@ function getLineNumber() {
function getIndent() {
let editor = vscode.window.activeTextEditor;
if (editor) {
let lineNum = fetchLineNumber(editor);
let textLine = editor.document.lineAt(lineNum - 1);
let textLine = fetchTextLine(editor);
if (textLine.isEmptyOrWhitespace) {
vscode.window.showInformationMessage(`"Line ${lineNum.toString()} is Empty`);
}
@ -60,38 +72,70 @@ function getIndent() {
hard: !editor.options.insertSpaces
};
let i = pl.Lexer.getIndent(textLine.text, tabFmt);
vscode.window.showInformationMessage(`Line ${lineNum.toString()}: ${i.toString()} indents`);
// Ternary operator to change the tense of 'indent' to 'indents' for the output if i is greater than 1
(i > 1) ?
vscode.window.showInformationMessage(`Line ${lineNum.toString()}: ${i.toString()} indents`) :
vscode.window.showInformationMessage(`Line ${lineNum.toString()}: ${i.toString()} indent`);
}
}
else {
vscode.window.showErrorMessage('No document currently active');
}
}
/* Function -> Returns the number of leading spaces on the line the cursor is on
* This is done by returning the index of the first non whitespace character
* Since this index is a 0-index, the returned number will correspond to the number of leading spaces
* There are two methods that can be used to find the leading spaces:
* method 1:
* calculates the number of leading spaces by finding the length of the current line
* then subtracting from that the length of the text after trimming the whitespace at the start
* which will equal the number of whitespace characters
*
* TO-USE: set calculateLeadingSpaces to true
*
* method 2 (default):
* finds the index position of the first non-whitespace character in a 0-index
* this number will equal the number of spaces preceding the non-whitespace character
* due to the nature of 0-indexes.
*
* TO-USE: set calculateLeadingSpaces to false
*/
function getLeadingSpaces() {
let editor = vscode.window.activeTextEditor;
if (editor) {
let lineNum = fetchLineNumber(editor);
let textLine = editor.document.lineAt(lineNum - 1);
const lineNum = fetchLineNumber(editor);
const textLine = fetchTextLine(editor);
if (textLine.isEmptyOrWhitespace) {
vscode.window.showInformationMessage(`Line ${lineNum.toString()} is empty`);
}
else {
let numSpaces = textLine.firstNonWhitespaceCharacterIndex;
// let numSpaces = textLine.text.length - textLine.text.trimStart().length; // Alternative method, same result by calculating the leading spaces
vscode.window.showInformationMessage(`Line ${lineNum.toString()}: ${numSpaces.toString()} spaces`);
/*
* set true to use method 1: find the number of leading spaces through arithmetic
* set false to use method 2: find the index position of the first non-whitespace character in a 0-index
*
* default: false
*/
const calculateLeadingSpaces = false; // change boolean value to change method
const numSpaces = (calculateLeadingSpaces === true) ?
pl.Lexer.getLeadingSpacesByArithmetic(textLine) :
pl.Lexer.getLeadingSpacesByIndex(textLine);
/* Ternary operator to change the tense of 'space' to 'spaces' for the output if numSpaces is greater than 1 */
(numSpaces > 1) ?
vscode.window.showInformationMessage(`Line ${lineNum.toString()}: ${numSpaces.toString()} spaces`) :
vscode.window.showInformationMessage(`Line ${lineNum.toString()}: ${numSpaces.toString()} space`);
}
}
else {
vscode.window.showErrorMessage('No document currently active');
}
}
function runLineContext() {
let editor = vscode.window.activeTextEditor;
if (editor) {
// current text and line number
let editorText = editor.document.getText();
@ -105,27 +149,34 @@ function runLineContext() {
let context = parser.context(line);
// build text
let contentString = createContextString(context, line);
vscode.window.showInformationMessage(contentString);
}
else {
vscode.window.showErrorMessage('No document currently active');
}
}
function createContextString(context, line) {
if (context.length < 1) {
throw new Error('Cannot create context string for empty context');
}
let contextString = 'Line ' + (line + 1); // 1 based
if (context[0].token && context[0].token.attr) {
contextString += ': ' + context[0].token.type.toString() + ' ' + context[0].token.attr.toString();
}
for (let i = 1; i < context.length; i++) {
let node = context[i];
if (node.label === 'root') {
// root
contextString += ' in the Document Root';
continue;
}
if (node.token.type !== pl.PylexSymbol.EMPTY &&
node.token.type !== pl.PylexSymbol.INDENT) {
contextString += ' inside ' + node.token.type.toString();
@ -136,14 +187,17 @@ function createContextString(context, line) {
}
return contextString;
}
// find up to `n` words around the cursor, where `n` is
// the value of `#mindReader.reader.contextWindow`
function runCursorContext() {
let editor = vscode.window.activeTextEditor;
if (!editor) {
vscode.window.showErrorMessage('RunCursorContext: No Active Editor');
return;
}
const cursorPos = editor.selection.active;
const text = editor.document.lineAt(cursorPos).text;
const windowSize = vscode.workspace.getConfiguration('mindReader').get('reader.contextWindow');
@ -154,6 +208,7 @@ function runCursorContext() {
let maxPos = text.length;
// clamp cursor start/end to new range
let col = cursorPos.character; // effective column of the cursor position
if (col < leadingWS) {
// move effective start to first non-whitespace character in the line
col = leadingWS;
@ -162,11 +217,14 @@ function runCursorContext() {
// move effective end to last non-whitespace character in the line
col = leadingWS + trimmedText.length - 1;
}
// generate list of space separate words with range data (start, end)
// TODO: can find user position to be done in one pass
let spaceWords = [];
while (pos < maxPos && trimmedText.length > 0) {
let word = trimmedText.replace(/ .*/, '');
spaceWords.push({ word, start: pos, end: pos + word.length });
// remove processed word from trimmed text
const oldText = trimmedText;
@ -176,6 +234,7 @@ function runCursorContext() {
}
// find word the user is in
let contextStart = -1, contextEnd = -1;
for (let i = 0; i < spaceWords.length; i++) {
if (col >= spaceWords[i].start && col <= spaceWords[i].end) {
// found the word
@ -183,6 +242,7 @@ function runCursorContext() {
contextEnd = Math.min(spaceWords.length, i + windowSize + 1); // clamp end index
// construct cursor context string
let contextString = '';
for (let i = contextStart; i < contextEnd; i++) {
contextString += spaceWords[i].word + ' ';
}