/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import './viewCursors.css';
import { createFastDomNode } from '../../../../base/browser/fastDomNode.js';
import { TimeoutTimer } from '../../../../base/common/async.js';
import { ViewPart } from '../../view/viewPart.js';
import { ViewCursor } from './viewCursor.js';
import { TextEditorCursorStyle } from '../../../common/config/editorOptions.js';
import { editorCursorBackground, editorCursorForeground } from '../../../common/core/editorColorRegistry.js';
import { registerThemingParticipant } from '../../../../platform/theme/common/themeService.js';
import { isHighContrast } from '../../../../platform/theme/common/theme.js';
import { WindowIntervalTimer, getWindow } from '../../../../base/browser/dom.js';
export class ViewCursors extends ViewPart {
    constructor(context) {
        super(context);
        const options = this._context.configuration.options;
        this._readOnly = options.get(90 /* EditorOption.readOnly */);
        this._cursorBlinking = options.get(26 /* EditorOption.cursorBlinking */);
        this._cursorStyle = options.get(28 /* EditorOption.cursorStyle */);
        this._cursorSmoothCaretAnimation = options.get(27 /* EditorOption.cursorSmoothCaretAnimation */);
        this._selectionIsEmpty = true;
        this._isComposingInput = false;
        this._isVisible = false;
        this._primaryCursor = new ViewCursor(this._context);
        this._secondaryCursors = [];
        this._renderData = [];
        this._domNode = createFastDomNode(document.createElement('div'));
        this._domNode.setAttribute('role', 'presentation');
        this._domNode.setAttribute('aria-hidden', 'true');
        this._updateDomClassName();
        this._domNode.appendChild(this._primaryCursor.getDomNode());
        this._startCursorBlinkAnimation = new TimeoutTimer();
        this._cursorFlatBlinkInterval = new WindowIntervalTimer();
        this._blinkingEnabled = false;
        this._editorHasFocus = false;
        this._updateBlinking();
    }
    dispose() {
        super.dispose();
        this._startCursorBlinkAnimation.dispose();
        this._cursorFlatBlinkInterval.dispose();
    }
    getDomNode() {
        return this._domNode;
    }
    // --- begin event handlers
    onCompositionStart(e) {
        this._isComposingInput = true;
        this._updateBlinking();
        return true;
    }
    onCompositionEnd(e) {
        this._isComposingInput = false;
        this._updateBlinking();
        return true;
    }
    onConfigurationChanged(e) {
        const options = this._context.configuration.options;
        this._readOnly = options.get(90 /* EditorOption.readOnly */);
        this._cursorBlinking = options.get(26 /* EditorOption.cursorBlinking */);
        this._cursorStyle = options.get(28 /* EditorOption.cursorStyle */);
        this._cursorSmoothCaretAnimation = options.get(27 /* EditorOption.cursorSmoothCaretAnimation */);
        this._updateBlinking();
        this._updateDomClassName();
        this._primaryCursor.onConfigurationChanged(e);
        for (let i = 0, len = this._secondaryCursors.length; i < len; i++) {
            this._secondaryCursors[i].onConfigurationChanged(e);
        }
        return true;
    }
    _onCursorPositionChanged(position, secondaryPositions, reason) {
        const pauseAnimation = (this._secondaryCursors.length !== secondaryPositions.length
            || (this._cursorSmoothCaretAnimation === 'explicit' && reason !== 3 /* CursorChangeReason.Explicit */));
        this._primaryCursor.onCursorPositionChanged(position, pauseAnimation);
        this._updateBlinking();
        if (this._secondaryCursors.length < secondaryPositions.length) {
            // Create new cursors
            const addCnt = secondaryPositions.length - this._secondaryCursors.length;
            for (let i = 0; i < addCnt; i++) {
                const newCursor = new ViewCursor(this._context);
                this._domNode.domNode.insertBefore(newCursor.getDomNode().domNode, this._primaryCursor.getDomNode().domNode.nextSibling);
                this._secondaryCursors.push(newCursor);
            }
        }
        else if (this._secondaryCursors.length > secondaryPositions.length) {
            // Remove some cursors
            const removeCnt = this._secondaryCursors.length - secondaryPositions.length;
            for (let i = 0; i < removeCnt; i++) {
                this._domNode.removeChild(this._secondaryCursors[0].getDomNode());
                this._secondaryCursors.splice(0, 1);
            }
        }
        for (let i = 0; i < secondaryPositions.length; i++) {
            this._secondaryCursors[i].onCursorPositionChanged(secondaryPositions[i], pauseAnimation);
        }
    }
    onCursorStateChanged(e) {
        const positions = [];
        for (let i = 0, len = e.selections.length; i < len; i++) {
            positions[i] = e.selections[i].getPosition();
        }
        this._onCursorPositionChanged(positions[0], positions.slice(1), e.reason);
        const selectionIsEmpty = e.selections[0].isEmpty();
        if (this._selectionIsEmpty !== selectionIsEmpty) {
            this._selectionIsEmpty = selectionIsEmpty;
            this._updateDomClassName();
        }
        return true;
    }
    onDecorationsChanged(e) {
        // true for inline decorations that can end up relayouting text
        return true;
    }
    onFlushed(e) {
        return true;
    }
    onFocusChanged(e) {
        this._editorHasFocus = e.isFocused;
        this._updateBlinking();
        return false;
    }
    onLinesChanged(e) {
        return true;
    }
    onLinesDeleted(e) {
        return true;
    }
    onLinesInserted(e) {
        return true;
    }
    onScrollChanged(e) {
        return true;
    }
    onTokensChanged(e) {
        const shouldRender = (position) => {
            for (let i = 0, len = e.ranges.length; i < len; i++) {
                if (e.ranges[i].fromLineNumber <= position.lineNumber && position.lineNumber <= e.ranges[i].toLineNumber) {
                    return true;
                }
            }
            return false;
        };
        if (shouldRender(this._primaryCursor.getPosition())) {
            return true;
        }
        for (const secondaryCursor of this._secondaryCursors) {
            if (shouldRender(secondaryCursor.getPosition())) {
                return true;
            }
        }
        return false;
    }
    onZonesChanged(e) {
        return true;
    }
    // --- end event handlers
    // ---- blinking logic
    _getCursorBlinking() {
        if (this._isComposingInput) {
            // avoid double cursors
            return 0 /* TextEditorCursorBlinkingStyle.Hidden */;
        }
        if (!this._editorHasFocus) {
            return 0 /* TextEditorCursorBlinkingStyle.Hidden */;
        }
        if (this._readOnly) {
            return 5 /* TextEditorCursorBlinkingStyle.Solid */;
        }
        return this._cursorBlinking;
    }
    _updateBlinking() {
        this._startCursorBlinkAnimation.cancel();
        this._cursorFlatBlinkInterval.cancel();
        const blinkingStyle = this._getCursorBlinking();
        // hidden and solid are special as they involve no animations
        const isHidden = (blinkingStyle === 0 /* TextEditorCursorBlinkingStyle.Hidden */);
        const isSolid = (blinkingStyle === 5 /* TextEditorCursorBlinkingStyle.Solid */);
        if (isHidden) {
            this._hide();
        }
        else {
            this._show();
        }
        this._blinkingEnabled = false;
        this._updateDomClassName();
        if (!isHidden && !isSolid) {
            if (blinkingStyle === 1 /* TextEditorCursorBlinkingStyle.Blink */) {
                // flat blinking is handled by JavaScript to save battery life due to Chromium step timing issue https://bugs.chromium.org/p/chromium/issues/detail?id=361587
                this._cursorFlatBlinkInterval.cancelAndSet(() => {
                    if (this._isVisible) {
                        this._hide();
                    }
                    else {
                        this._show();
                    }
                }, ViewCursors.BLINK_INTERVAL, getWindow(this._domNode.domNode));
            }
            else {
                this._startCursorBlinkAnimation.setIfNotSet(() => {
                    this._blinkingEnabled = true;
                    this._updateDomClassName();
                }, ViewCursors.BLINK_INTERVAL);
            }
        }
    }
    // --- end blinking logic
    _updateDomClassName() {
        this._domNode.setClassName(this._getClassName());
    }
    _getClassName() {
        let result = 'cursors-layer';
        if (!this._selectionIsEmpty) {
            result += ' has-selection';
        }
        switch (this._cursorStyle) {
            case TextEditorCursorStyle.Line:
                result += ' cursor-line-style';
                break;
            case TextEditorCursorStyle.Block:
                result += ' cursor-block-style';
                break;
            case TextEditorCursorStyle.Underline:
                result += ' cursor-underline-style';
                break;
            case TextEditorCursorStyle.LineThin:
                result += ' cursor-line-thin-style';
                break;
            case TextEditorCursorStyle.BlockOutline:
                result += ' cursor-block-outline-style';
                break;
            case TextEditorCursorStyle.UnderlineThin:
                result += ' cursor-underline-thin-style';
                break;
            default:
                result += ' cursor-line-style';
        }
        if (this._blinkingEnabled) {
            switch (this._getCursorBlinking()) {
                case 1 /* TextEditorCursorBlinkingStyle.Blink */:
                    result += ' cursor-blink';
                    break;
                case 2 /* TextEditorCursorBlinkingStyle.Smooth */:
                    result += ' cursor-smooth';
                    break;
                case 3 /* TextEditorCursorBlinkingStyle.Phase */:
                    result += ' cursor-phase';
                    break;
                case 4 /* TextEditorCursorBlinkingStyle.Expand */:
                    result += ' cursor-expand';
                    break;
                case 5 /* TextEditorCursorBlinkingStyle.Solid */:
                    result += ' cursor-solid';
                    break;
                default:
                    result += ' cursor-solid';
            }
        }
        else {
            result += ' cursor-solid';
        }
        if (this._cursorSmoothCaretAnimation === 'on' || this._cursorSmoothCaretAnimation === 'explicit') {
            result += ' cursor-smooth-caret-animation';
        }
        return result;
    }
    _show() {
        this._primaryCursor.show();
        for (let i = 0, len = this._secondaryCursors.length; i < len; i++) {
            this._secondaryCursors[i].show();
        }
        this._isVisible = true;
    }
    _hide() {
        this._primaryCursor.hide();
        for (let i = 0, len = this._secondaryCursors.length; i < len; i++) {
            this._secondaryCursors[i].hide();
        }
        this._isVisible = false;
    }
    // ---- IViewPart implementation
    prepareRender(ctx) {
        this._primaryCursor.prepareRender(ctx);
        for (let i = 0, len = this._secondaryCursors.length; i < len; i++) {
            this._secondaryCursors[i].prepareRender(ctx);
        }
    }
    render(ctx) {
        const renderData = [];
        let renderDataLen = 0;
        const primaryRenderData = this._primaryCursor.render(ctx);
        if (primaryRenderData) {
            renderData[renderDataLen++] = primaryRenderData;
        }
        for (let i = 0, len = this._secondaryCursors.length; i < len; i++) {
            const secondaryRenderData = this._secondaryCursors[i].render(ctx);
            if (secondaryRenderData) {
                renderData[renderDataLen++] = secondaryRenderData;
            }
        }
        this._renderData = renderData;
    }
    getLastRenderData() {
        return this._renderData;
    }
}
ViewCursors.BLINK_INTERVAL = 500;
registerThemingParticipant((theme, collector) => {
    const caret = theme.getColor(editorCursorForeground);
    if (caret) {
        let caretBackground = theme.getColor(editorCursorBackground);
        if (!caretBackground) {
            caretBackground = caret.opposite();
        }
        collector.addRule(`.monaco-editor .cursors-layer .cursor { background-color: ${caret}; border-color: ${caret}; color: ${caretBackground}; }`);
        if (isHighContrast(theme.type)) {
            collector.addRule(`.monaco-editor .cursors-layer.has-selection .cursor { border-left: 1px solid ${caretBackground}; border-right: 1px solid ${caretBackground}; }`);
        }
    }
});
