"use strict";
/* --------------------------------------------------------------------------------------------
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 * ------------------------------------------------------------------------------------------ */
Object.defineProperty(exports, "__esModule", { value: true });
exports.SemanticTokensBuilder = exports.SemanticTokensDiff = exports.SemanticTokensFeature = void 0;
const vscode_languageserver_protocol_1 = require("vscode-languageserver-protocol");
const SemanticTokensFeature = (Base) => {
    return class extends Base {
        get semanticTokens() {
            return {
                refresh: () => {
                    return this.connection.sendRequest(vscode_languageserver_protocol_1.SemanticTokensRefreshRequest.type);
                },
                on: (handler) => {
                    const type = vscode_languageserver_protocol_1.SemanticTokensRequest.type;
                    return this.connection.onRequest(type, (params, cancel) => {
                        return handler(params, cancel, this.attachWorkDoneProgress(params), this.attachPartialResultProgress(type, params));
                    });
                },
                onDelta: (handler) => {
                    const type = vscode_languageserver_protocol_1.SemanticTokensDeltaRequest.type;
                    return this.connection.onRequest(type, (params, cancel) => {
                        return handler(params, cancel, this.attachWorkDoneProgress(params), this.attachPartialResultProgress(type, params));
                    });
                },
                onRange: (handler) => {
                    const type = vscode_languageserver_protocol_1.SemanticTokensRangeRequest.type;
                    return this.connection.onRequest(type, (params, cancel) => {
                        return handler(params, cancel, this.attachWorkDoneProgress(params), this.attachPartialResultProgress(type, params));
                    });
                }
            };
        }
    };
};
exports.SemanticTokensFeature = SemanticTokensFeature;
class SemanticTokensDiff {
    constructor(originalSequence, modifiedSequence) {
        this.originalSequence = originalSequence;
        this.modifiedSequence = modifiedSequence;
    }
    computeDiff() {
        const originalLength = this.originalSequence.length;
        const modifiedLength = this.modifiedSequence.length;
        let startIndex = 0;
        while (startIndex < modifiedLength && startIndex < originalLength && this.originalSequence[startIndex] === this.modifiedSequence[startIndex]) {
            startIndex++;
        }
        if (startIndex < modifiedLength && startIndex < originalLength) {
            let originalEndIndex = originalLength - 1;
            let modifiedEndIndex = modifiedLength - 1;
            while (originalEndIndex >= startIndex && modifiedEndIndex >= startIndex && this.originalSequence[originalEndIndex] === this.modifiedSequence[modifiedEndIndex]) {
                originalEndIndex--;
                modifiedEndIndex--;
            }
            // if one moved behind the start index move them forward again
            if (originalEndIndex < startIndex || modifiedEndIndex < startIndex) {
                originalEndIndex++;
                modifiedEndIndex++;
            }
            const deleteCount = originalEndIndex - startIndex + 1;
            const newData = this.modifiedSequence.slice(startIndex, modifiedEndIndex + 1);
            // If we moved behind the start index we could have missed a simple delete.
            if (newData.length === 1 && newData[0] === this.originalSequence[originalEndIndex]) {
                return [
                    { start: startIndex, deleteCount: deleteCount - 1 }
                ];
            }
            else {
                return [
                    { start: startIndex, deleteCount, data: newData }
                ];
            }
        }
        else if (startIndex < modifiedLength) {
            return [
                { start: startIndex, deleteCount: 0, data: this.modifiedSequence.slice(startIndex) }
            ];
        }
        else if (startIndex < originalLength) {
            return [
                { start: startIndex, deleteCount: originalLength - startIndex }
            ];
        }
        else {
            // The two arrays are the same.
            return [];
        }
    }
}
exports.SemanticTokensDiff = SemanticTokensDiff;
class SemanticTokensBuilder {
    constructor() {
        this._prevData = undefined;
        this.initialize();
    }
    initialize() {
        this._id = Date.now();
        this._prevLine = 0;
        this._prevChar = 0;
        this._data = [];
        this._dataLen = 0;
    }
    push(line, char, length, tokenType, tokenModifiers) {
        let pushLine = line;
        let pushChar = char;
        if (this._dataLen > 0) {
            pushLine -= this._prevLine;
            if (pushLine === 0) {
                pushChar -= this._prevChar;
            }
        }
        this._data[this._dataLen++] = pushLine;
        this._data[this._dataLen++] = pushChar;
        this._data[this._dataLen++] = length;
        this._data[this._dataLen++] = tokenType;
        this._data[this._dataLen++] = tokenModifiers;
        this._prevLine = line;
        this._prevChar = char;
    }
    get id() {
        return this._id.toString();
    }
    previousResult(id) {
        if (this.id === id) {
            this._prevData = this._data;
        }
        this.initialize();
    }
    build() {
        this._prevData = undefined;
        return {
            resultId: this.id,
            data: this._data
        };
    }
    canBuildEdits() {
        return this._prevData !== undefined;
    }
    buildEdits() {
        if (this._prevData !== undefined) {
            return {
                resultId: this.id,
                edits: (new SemanticTokensDiff(this._prevData, this._data)).computeDiff()
            };
        }
        else {
            return this.build();
        }
    }
}
exports.SemanticTokensBuilder = SemanticTokensBuilder;
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