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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as vscode from 'vscode';
import { getRootNode } from './parseDocument';
import { validate, getHtmlFlatNode, offsetRangeToVsRange } from './util';
import { HtmlNode as HtmlFlatNode } from 'EmmetFlatNode';
export function removeTag() {
if (!validate(false) || !vscode.window.activeTextEditor) {
return;
}
const editor = vscode.window.activeTextEditor;
const document = editor.document;
const rootNode = <HtmlFlatNode>getRootNode(document, true);
if (!rootNode) {
return;
}
let finalRangesToRemove = Array.from(editor.selections).reverse()
.reduce<vscode.Range[]>((prev, selection) =>
prev.concat(getRangesToRemove(editor.document, rootNode, selection)), []);
return editor.edit(editBuilder => {
finalRangesToRemove.forEach(range => {
editBuilder.delete(range);
});
});
}
/**
* Calculates the ranges to remove, along with what to replace those ranges with.
* It finds the node to remove based on the selection's start position
* and then removes that node, reindenting the content in between.
*/
function getRangesToRemove(document: vscode.TextDocument, rootNode: HtmlFlatNode, selection: vscode.Selection): vscode.Range[] {
const offset = document.offsetAt(selection.start);
const nodeToUpdate = getHtmlFlatNode(document.getText(), rootNode, offset, true);
if (!nodeToUpdate) {
return [];
}
let openTagRange: vscode.Range | undefined;
if (nodeToUpdate.open) {
openTagRange = offsetRangeToVsRange(document, nodeToUpdate.open.start, nodeToUpdate.open.end);
}
let closeTagRange: vscode.Range | undefined;
if (nodeToUpdate.close) {
closeTagRange = offsetRangeToVsRange(document, nodeToUpdate.close.start, nodeToUpdate.close.end);
}
if (openTagRange && closeTagRange) {
const innerCombinedRange = new vscode.Range(
openTagRange.end.line,
openTagRange.end.character,
closeTagRange.start.line,
closeTagRange.start.character);
const outerCombinedRange = new vscode.Range(
openTagRange.start.line,
openTagRange.start.character,
closeTagRange.end.line,
closeTagRange.end.character);
// Special case: there is only whitespace in between.
if (document.getText(innerCombinedRange).trim() === '' && nodeToUpdate.name !== 'pre') {
return [outerCombinedRange];
}
}
let rangesToRemove = [];
if (openTagRange) {
rangesToRemove.push(openTagRange);
if (closeTagRange) {
const indentAmountToRemove = calculateIndentAmountToRemove(document, openTagRange, closeTagRange);
let firstInnerNonEmptyLine: number | undefined;
let lastInnerNonEmptyLine: number | undefined;
for (let i = openTagRange.start.line + 1; i < closeTagRange.start.line; i++) {
if (!document.lineAt(i).isEmptyOrWhitespace) {
rangesToRemove.push(new vscode.Range(i, 0, i, indentAmountToRemove));
if (firstInnerNonEmptyLine === undefined) {
// We found the first non-empty inner line.
firstInnerNonEmptyLine = i;
}
lastInnerNonEmptyLine = i;
}
}
// Remove the entire last line + empty lines preceding it
// if it is just the tag, otherwise remove just the tag.
if (entireLineIsTag(document, closeTagRange) && lastInnerNonEmptyLine) {
rangesToRemove.push(new vscode.Range(
lastInnerNonEmptyLine,
document.lineAt(lastInnerNonEmptyLine).range.end.character,
closeTagRange.end.line,
closeTagRange.end.character));
} else {
rangesToRemove.push(closeTagRange);
}
// Remove the entire first line + empty lines proceding it
// if it is just the tag, otherwise keep on removing just the tag.
if (entireLineIsTag(document, openTagRange) && firstInnerNonEmptyLine) {
rangesToRemove[1] = new vscode.Range(
openTagRange.start.line,
openTagRange.start.character,
firstInnerNonEmptyLine,
document.lineAt(firstInnerNonEmptyLine).firstNonWhitespaceCharacterIndex);
rangesToRemove.shift();
}
}
}
return rangesToRemove;
}
function entireLineIsTag(document: vscode.TextDocument, range: vscode.Range): boolean {
if (range.start.line === range.end.line) {
const lineText = document.lineAt(range.start).text;
const tagText = document.getText(range);
if (lineText.trim() === tagText) {
return true;
}
}
return false;
}
/**
* Calculates the amount of indent to remove for getRangesToRemove.
*/
function calculateIndentAmountToRemove(document: vscode.TextDocument, openRange: vscode.Range, closeRange: vscode.Range): number {
const startLine = openRange.start.line;
const endLine = closeRange.start.line;
const startLineIndent = document.lineAt(startLine).firstNonWhitespaceCharacterIndex;
const endLineIndent = document.lineAt(endLine).firstNonWhitespaceCharacterIndex;
let contentIndent: number | undefined;
for (let i = startLine + 1; i < endLine; i++) {
const line = document.lineAt(i);
if (!line.isEmptyOrWhitespace) {
const lineIndent = line.firstNonWhitespaceCharacterIndex;
contentIndent = !contentIndent ? lineIndent : Math.min(contentIndent, lineIndent);
}
}
let indentAmount = 0;
if (contentIndent) {
if (contentIndent < startLineIndent || contentIndent < endLineIndent) {
indentAmount = 0;
}
else {
indentAmount = Math.min(contentIndent - startLineIndent, contentIndent - endLineIndent);
}
}
return indentAmount;
}
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