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在 Bangumi 文本框工具栏中添加对齐按钮、渐变生成器和图片尺寸调整功能（带预览）
// ==UserScript==
// @name 猴子都会用的Bangumi bbcode辅助工具
// @namespace https://github.com/wakabayu
// @version 1.5
// @description 在 Bangumi 文本框工具栏中添加对齐按钮、渐变生成器和图片尺寸调整功能（带预览）
// @include /^https?:\/\/(bgm\.tv|chii\.in|bangumi\.tv)\/.*/
// @grant none
// @author wataame
// @license MIT
// ==/UserScript==
(function () {
'use strict';
let previewWindow = null;
let lastSelectedText = '';
// 防抖函数
function debounce(func, wait) {
let timeout;
return function executedFunction(...args) {
const later = () => {
clearTimeout(timeout);
func(...args);
};
clearTimeout(timeout);
timeout = setTimeout(later, wait);
};
}
// 安全执行函数
function safelyExecute(func, errorMessage) {
try {
return func();
} catch (error) {
console.error(error);
alert(errorMessage || '操作失败，请重试');
return null;
}
}
// 添加对齐和渐变按钮
function addToolbarButtons() {
document.querySelectorAll('.markItUpHeader').forEach(toolbar => {
if (toolbar.querySelector('.alignmentButton') || toolbar.querySelector('.gradientButton')) return;
const textarea = toolbar.closest('.markItUpContainer').querySelector('textarea');
if (!textarea) return;
const alignments = [
{ label: '◧L', bbcode: 'left', title: '左对齐 [left]' },
{ label: '▣C', bbcode: 'center', title: '居中对齐 [center]' },
{ label: '◨R', bbcode: 'right', title: '右对齐 [right]' }
];
alignments.forEach(alignment => addButton(toolbar, alignment.label, alignment.title, () => applyBBCode(textarea, alignment.bbcode)));
addButton(toolbar, '渐变', '生成渐变文字', () => {
const selectedText = getSelectedText(textarea);
if (!selectedText) return alert('请先选中需要应用渐变的文字');
openColorPicker(selectedText, textarea);
});
});
}
function addButton(toolbar, label, title, onClick) {
const button = document.createElement('a');
button.href = 'javascript:void(0);';
button.className = `${title.includes('对齐') ? 'alignmentButton' : 'gradientButton'}`;
button.title = title;
button.innerHTML = `<span style="font-weight: bold; margin: 0 8px;">${label}</span>`;
button.onclick = onClick;
button.style.margin = '0 6px';
toolbar.appendChild(button);
}
function applyBBCode(textarea, bbcode) {
const selectedText = getSelectedText(textarea);
const wrappedText = `[${bbcode}]${selectedText}[/${bbcode}]`;
replaceSelectedText(textarea, wrappedText);
}
function getSelectedText(textarea) {
return textarea.value.substring(textarea.selectionStart, textarea.selectionEnd);
}
function replaceSelectedText(textarea, newText) {
const start = textarea.selectionStart;
const end = textarea.selectionEnd;
textarea.setRangeText(newText, start, end, 'end');
}
// 创建通用弹窗
function createPopup(id, content) {
const popup = document.createElement('div');
popup.id = id;
popup.style = `
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: #fff;
padding: 20px;
border: 1px solid #ccc;
z-index: 9999;
box-shadow: 0 0 10px rgba(0,0,0,0.1)
`;
popup.innerHTML = content;
return popup;
}
// 颜色选择器相关函数
function openColorPicker(selectedText, textarea) {
if (document.getElementById('colorPickerContainer')) return;
const colorPickerContainer = createPopup('colorPickerContainer', `
<label>选择起始颜色：<input type="color" value="#0ebeff" id="startColor"></label><br>
<label>选择结束颜色：<input type="color" value="#5e95e6" id="endColor"></label><br>
<label>输入步数：<input type="number" min="1" value="${selectedText.length}" id="steps"></label><br>
<button id="generate">生成</button> <button id="cancel">取消</button><br>
<div id="historyContainer" style="margin-top: 10px;"><strong>最近使用的方案:</strong><br></div>
`);
document.body.appendChild(colorPickerContainer);
loadGradientHistory();
document.querySelector('#generate').onclick = () => {
const startColor = document.querySelector('#startColor').value;
const endColor = document.querySelector('#endColor').value;
const steps = parseInt(document.querySelector('#steps').value);
if (isNaN(steps) || steps <= 0) return alert('请输入有效的步数');
const gradientText = generateGradientText(selectedText, startColor, endColor, steps);
replaceSelectedText(textarea, gradientText);
saveGradientHistory(startColor, endColor);
closePopup(colorPickerContainer);
};
document.querySelector('#cancel').onclick = () => closePopup(colorPickerContainer);
}
function generateGradientText(text, startColor, endColor, steps) {
const startRGB = hexToRgb(startColor), endRGB = hexToRgb(endColor);
const segmentLength = Math.ceil(text.length / steps);
return Array.from({ length: steps }, (_, i) => {
const ratio = i / (steps - 1);
const color = `#${rgbToHex(interpolate(startRGB.r, endRGB.r, ratio))}${rgbToHex(interpolate(startRGB.g, endRGB.g, ratio))}${rgbToHex(interpolate(startRGB.b, endRGB.b, ratio))}`;
return `[color=${color}]${text.slice(i * segmentLength, (i + 1) * segmentLength)}[/color]`;
}).join('');
}
function interpolate(start, end, ratio) {
return clamp(Math.round(start + ratio * (end - start)));
}
const clamp = value => Math.max(0, Math.min(255, value));
const hexToRgb = hex => ({ r: parseInt(hex.slice(1, 3), 16), g: parseInt(hex.slice(3, 5), 16), b: parseInt(hex.slice(5, 7), 16) });
const rgbToHex = value => value.toString(16).padStart(2, '0');
function closePopup(container) {
document.body.removeChild(container);
}
function saveGradientHistory(startColor, endColor) {
const history = JSON.parse(localStorage.getItem('gradientHistory') || '[]');
const newEntry = { start: startColor, end: endColor };
if (!history.some(entry => entry.start === startColor && entry.end === endColor)) {
history.unshift(newEntry);
if (history.length > 5) history.pop();
localStorage.setItem('gradientHistory', JSON.stringify(history));
}
}
function loadGradientHistory() {
const historyContainer = document.querySelector('#historyContainer');
const history = JSON.parse(localStorage.getItem('gradientHistory') || '[]');
historyContainer.innerHTML = '<strong>最近方案:</strong><br>';
history.forEach((entry, index) => {
const historyButton = document.createElement('button');
historyButton.style = `background: linear-gradient(to right, ${entry.start}, ${entry.end}); border: none; color: #fff; padding: 5px; margin: 2px; cursor: pointer;`;
historyButton.innerText = `方案 ${index + 1}`;
historyButton.onclick = () => {
document.querySelector('#startColor').value = entry.start;
document.querySelector('#endColor').value = entry.end;
};
historyContainer.appendChild(historyButton);
});
}
// 图片尺寸调整相关函数
function createOrUpdatePreviewWindow(selectedText, textarea) {
if (previewWindow) previewWindow.remove();
previewWindow = createPopup('imgSizeSelector', `
<div style="text-align: center; margin-bottom: 15px;">
<strong>调整图片尺寸</strong>
</div>
<div id="previewArea" style="
margin: 10px auto;
text-align: center;
max-height: 300px;
overflow: auto;
border: 1px solid #ddd;
padding: 10px;
">
<img id="previewImage" style="max-width: 100%; height: auto;" />
</div>
<div id="sizeInfo" style="margin: 10px 0; text-align: center; font-size: 14px;"></div>
<div style="display: flex; justify-content: center; gap: 10px; margin: 15px 0;">
<div id="presetButtons" style="display: flex; gap: 5px;"></div>
</div>
<div style="display: flex; justify-content: center; gap: 10px; margin: 15px 0;">
<input type="number" id="customWidth" placeholder="宽度" style="width: 80px; padding: 5px;">
<span style="line-height: 30px;">×</span>
<input type="number" id="customHeight" placeholder="高度" style="width: 80px; padding: 5px;">
<button id="lockRatio" style="padding: 0 8px;" title="锁定宽高比">🔒</button>
</div>
<div style="text-align: center; margin-top: 15px;">
<button id="applySize" style="margin-right: 10px; padding: 5px 15px;">应用</button>
<button id="closeWindow" style="padding: 5px 15px;">关闭</button>
</div>
`);
document.body.appendChild(previewWindow);
// 获取元素引用
const sizeInfo = previewWindow.querySelector('#sizeInfo');
const presetButtons = previewWindow.querySelector('#presetButtons');
const customWidth = previewWindow.querySelector('#customWidth');
const customHeight = previewWindow.querySelector('#customHeight');
const lockRatioBtn = previewWindow.querySelector('#lockRatio');
const applyButton = previewWindow.querySelector('#applySize');
const closeButton = previewWindow.querySelector('#closeWindow');
const previewImage = previewWindow.querySelector('#previewImage');
const previewArea = previewWindow.querySelector('#previewArea');
// 状态变量
let originalWidth = 0;
let originalHeight = 0;
let selectedWidth = 0;
let selectedHeight = 0;
let isRatioLocked = true;
let aspectRatio = 1;
// 预设尺寸按钮
const presets = [
{ label: '25%', value: 0.25 },
{ label: '50%', value: 0.5 },
{ label: '75%', value: 0.75 },
{ label: '100%', value: 1 }
];
// 创建预设按钮
presets.forEach(preset => {
const button = document.createElement('button');
button.innerText = preset.label;
button.style = `
padding: 5px 10px;
cursor: pointer;
border: 1px solid #ccc;
border-radius: 4px;
background: #f0f0f0;
`;
button.onclick = () => {
selectedWidth = Math.round(originalWidth * preset.value);
selectedHeight = Math.round(originalHeight * preset.value);
updateInputs();
highlightButton(button);
};
presetButtons.appendChild(button);
});
// 锁定比例按钮
lockRatioBtn.style.background = isRatioLocked ? '#4a4a4a' : '#f0f0f0';
lockRatioBtn.style.color = isRatioLocked ? '#fff' : '#000';
lockRatioBtn.onclick = () => {
isRatioLocked = !isRatioLocked;
lockRatioBtn.style.background = isRatioLocked ? '#4a4a4a' : '#f0f0f0';
lockRatioBtn.style.color = isRatioLocked ? '#fff' : '#000';
};
function updateInputs() {
customWidth.value = selectedWidth;
customHeight.value = selectedHeight;
updateSizeInfo();
updatePreview();
}
function updateSizeInfo() {
const widthPercent = Math.round((selectedWidth / originalWidth) * 100);
const heightPercent = Math.round((selectedHeight / originalHeight) * 100);
sizeInfo.textContent = `当前: ${selectedWidth} × ${selectedHeight} (${widthPercent}%)
原始: ${originalWidth} × ${originalHeight}`;
}
function updatePreview() {
if (previewImage) {
// 添加加载提示
previewImage.style.opacity = '0.3';
previewImage.style.transition = 'opacity 0.3s';
previewImage.onload = () => {
previewImage.style.opacity = '1';
};
previewImage.style.width = `${selectedWidth}px`;
previewImage.style.height = `${selectedHeight}px`;
// 调整预览区域的大小
const maxPreviewWidth = Math.min(selectedWidth, window.innerWidth * 0.8);
const maxPreviewHeight = Math.min(selectedHeight, 300);
previewArea.style.width = `${maxPreviewWidth}px`;
previewArea.style.height = `${maxPreviewHeight}px`;
// 如果图片尺寸超过预览区域，添加提示
if (selectedWidth > maxPreviewWidth || selectedHeight > maxPreviewHeight) {
previewArea.title = '图片已按比例缩放以适应预览窗口';
} else {
previewArea.title = '';
}
}
}
function highlightButton(activeButton) {
presetButtons.querySelectorAll('button').forEach(btn => {
btn.style.background = '#f0f0f0';
btn.style.color = '#000';
});
activeButton.style.background = '#4a4a4a';
activeButton.style.color = '#fff';
}
function clearButtonHighlight() {
presetButtons.querySelectorAll('button').forEach(btn => {
btn.style.background = '#f0f0f0';
btn.style.color = '#000';
});
}
// 添加拖动调整大小功能
function addResizeDrag(previewImage) {
let isResizing = false;
let startX, startY, startWidth, startHeight;
previewImage.style.cursor = 'se-resize';
previewImage.addEventListener('mousedown', (e) => {
isResizing = true;
startX = e.clientX;
startY = e.clientY;
startWidth = selectedWidth;
startHeight = selectedHeight;
document.addEventListener('mousemove', handleMouseMove);
document.addEventListener('mouseup', () => {
isResizing = false;
document.removeEventListener('mousemove', handleMouseMove);
}, { once: true });
});
function handleMouseMove(e) {
if (!isResizing) return;
const deltaX = e.clientX - startX;
const deltaY = e.clientY - startY;
if (isRatioLocked) {
// 保持宽高比
const ratio = Math.abs(deltaX) > Math.abs(deltaY) ? deltaX / startWidth : deltaY / startHeight;
selectedWidth = Math.max(10, Math.round(startWidth * (1 + ratio)));
selectedHeight = Math.max(10, Math.round(startHeight * (1 + ratio)));
} else {
selectedWidth = Math.max(10, startWidth + deltaX);
selectedHeight = Math.max(10, startHeight + deltaY);
}
updateInputs();
}
}
// 输入框事件处理
customWidth.oninput = () => {
const width = parseInt(customWidth.value);
if (width > 0) {
selectedWidth = width;
if (isRatioLocked) {
selectedHeight = Math.round(width / aspectRatio);
customHeight.value = selectedHeight;
}
updateSizeInfo();
updatePreview();
clearButtonHighlight();
}
};
customHeight.oninput = () => {
const height = parseInt(customHeight.value);
if (height > 0) {
selectedHeight = height;
if (isRatioLocked) {
selectedWidth = Math.round(height * aspectRatio);
customWidth.value = selectedWidth;
}
updateSizeInfo();
updatePreview();
clearButtonHighlight();
}
};
// 按钮事件处理
closeButton.onclick = () => {
previewWindow.remove();
lastSelectedText = '';
};
applyButton.onclick = () => {
if (selectedWidth && selectedHeight) {
const imgTagRegex = /\[img(?:=(\d+),(\d+))?\](https?:\/\/[^\s]+)\[\/img\]/;
const match = selectedText.match(imgTagRegex);
if (match) {
const imgURL = match[3];
const newCode = `[img=${selectedWidth},${selectedHeight}]${imgURL}[/img]`;
textarea.value = textarea.value.replace(selectedText, newCode);
}
}
previewWindow.remove();
lastSelectedText = '';
};
// 解析当前BBCode并获取图片信息
const imgTagRegex = /\[img(?:=(\d+),(\d+))?\](https?:\/\/[^\s]+)\[\/img\]/;
const match = selectedText.match(imgTagRegex);
if (!match) {
previewWindow.remove();
return;
}
const initialWidth = match[1] ? parseInt(match[1], 10) : null;
const initialHeight = match[2] ? parseInt(match[2], 10) : null;
const imgURL = match[3];
// 获取图片原始尺寸
const tempImg = new Image();
tempImg.onload = () => {
originalWidth = tempImg.naturalWidth;
originalHeight = tempImg.naturalHeight;
aspectRatio = originalWidth / originalHeight;
// 设置预览图片的源
previewImage.src = tempImg.src;
// 添加拖动调整大小功能
addResizeDrag(previewImage);
if (initialWidth && initialHeight) {
selectedWidth = initialWidth;
selectedHeight = initialHeight;
const scale = initialWidth / originalWidth;
const percentage = Math.round(scale * 100);
updateInputs();
// 选中对应预设按钮
presetButtons.querySelectorAll('button').forEach((btn, index) => {
if (percentage === presets[index].value * 100) {
highlightButton(btn);
}
});
} else {
selectedWidth = originalWidth;
selectedHeight = originalHeight;
updateInputs();
highlightButton(presetButtons.lastElementChild); // 100%
}
};
tempImg.src = imgURL;
}
// 监听文本选择变化
const debouncedHandleSelectionChange = debounce(handleSelectionChange, 250);
document.addEventListener('selectionchange', debouncedHandleSelectionChange);
function handleSelectionChange() {
const textarea = document.activeElement;
if (textarea && textarea.tagName === 'TEXTAREA') {
const selectedText = textarea.value.substring(textarea.selectionStart, textarea.selectionEnd).trim();
if (selectedText !== lastSelectedText && selectedText.match(/\[img(?:=(\d+),(\d+))?\]https?:\/\/[^\s]+\[\/img\]/)) {
createOrUpdatePreviewWindow(selectedText, textarea);
lastSelectedText = selectedText;
}
}
}
// 初始化
const observer = new MutationObserver(() => addToolbarButtons());
observer.observe(document.body, { childList: true, subtree: true });
})();