DeepSeek Ctrl+Enter Send

允许在DeepSeek网页端使用Ctrl+Enter发送，任意其他Enter换行，同时支持底部输入框和历史编辑框
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// ==UserScript==
// @name         DeepSeek Ctrl+Enter Send
// @name:zh_CN   DeepSeek仅Ctrl+Enter发送
// @namespace    https://greasyfork.org/zh-CN/users/1405279-knighthana
// @author       Knighthana;DeepSeek
// @version      [email protected]
// @description  允许在DeepSeek网页端使用Ctrl+Enter发送，任意其他Enter换行，同时支持底部输入框和历史编辑框
// @match        https://chat.deepseek.com/*
// @icon         https://www.deepseek.com/favicon.ico
// @grant        none
// @license      GNU GPLv3
// ==/UserScript==

(function() {
    'use strict';

    function isVisible(el) {
        return el && el.offsetParent !== null;
    }

    function findSendButton(textarea) {
        let bestBtn = null;
        let bestDepth = Infinity;
        let parent = textarea.parentElement;
        let depth = 0;
        const MAX_DEPTH = 10;

        while (parent && parent !== document.body && depth < MAX_DEPTH) {
            const btns = parent.querySelectorAll('.ds-button--primary');
            for (const btn of btns) {
                if (!isVisible(btn)) continue;
                const isCircle = btn.classList.contains('ds-button--circle');
                const isCapsuleSend = btn.classList.contains('ds-button--capsule') && btn.textContent.trim() === '发送';
                if (!isCircle && !isCapsuleSend) continue;

                const textareas = parent.querySelectorAll('textarea');
                if (textareas.length === 1 && textareas[0] === textarea) {
                    if (depth < bestDepth) {
                        bestDepth = depth;
                        bestBtn = btn;
                    }
                }
            }
            parent = parent.parentElement;
            depth++;
        }

        if (bestBtn) return bestBtn;

        // 后备全局查找
        const allBtns = document.querySelectorAll('.ds-button--primary');
        for (const btn of allBtns) {
            if (isVisible(btn) &&
                (btn.classList.contains('ds-button--circle') ||
                 (btn.classList.contains('ds-button--capsule') && btn.textContent.trim() === '发送'))) {
                return btn;
            }
        }
        return null;
    }

    function insertNewline(element) {
        if (element.tagName === 'TEXTAREA' || element.tagName === 'INPUT') {
            const start = element.selectionStart;
            const end = element.selectionEnd;
            const value = element.value;
            element.value = value.substring(0, start) + '\n' + value.substring(end);
            element.selectionStart = element.selectionEnd = start + 1;
            element.dispatchEvent(new Event('input', { bubbles: true }));
        } else if (element.isContentEditable) {
            document.execCommand('insertLineBreak');
        }
    }

    function simulateClick(el) {
        if (el) el.click();
    }

    let lastSendTime = 0;

    function handleEnter(event) {
        if (event.key !== 'Enter') return;
        const target = event.target;
        if (target.tagName !== 'TEXTAREA') return;

        event.preventDefault();
        event.stopPropagation();
        event.stopImmediatePropagation();

        if (event.type === 'keydown') {
            if (event.ctrlKey) {
                const now = Date.now();
                if (now - lastSendTime < 300) return;
                lastSendTime = now;

                const btn = findSendButton(target);
                if (btn) {
                    simulateClick(btn);
                } else {
                    console.warn('[脚本] 未找到关联发送按钮');
                }
            } else {
                insertNewline(target);
            }
        }
    }

    document.addEventListener('keydown', handleEnter, true);
    document.addEventListener('keyup', handleEnter, true);
})();