e-virt-table
Version:
A powerful data table based on canvas. You can use it as data grid、Microsoft Excel or Google sheets. It supports virtual scroll、cell edit etc.
405 lines • 15.4 kB
JavaScript
import Row from './Row';
export default class Body {
constructor(ctx) {
Object.defineProperty(this, "resizeTarget", {
enumerable: true,
configurable: true,
writable: true,
value: null
}); //调整行大小的目标
Object.defineProperty(this, "isMouseDown", {
enumerable: true,
configurable: true,
writable: true,
value: false
}); // 是否按下
Object.defineProperty(this, "resizeDiff", {
enumerable: true,
configurable: true,
writable: true,
value: 0
}); // 是否移动中
Object.defineProperty(this, "clientY", {
enumerable: true,
configurable: true,
writable: true,
value: 0
}); // 鼠标按下时的y轴位置
Object.defineProperty(this, "ctx", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
Object.defineProperty(this, "x", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "y", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "width", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "height", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "headIndex", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "tailIndex", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "isResizing", {
enumerable: true,
configurable: true,
writable: true,
value: false
}); //是否正在调整大小
Object.defineProperty(this, "renderRows", {
enumerable: true,
configurable: true,
writable: true,
value: []
});
Object.defineProperty(this, "visibleRows", {
enumerable: true,
configurable: true,
writable: true,
value: []
});
Object.defineProperty(this, "visibleHeight", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "visibleWidth", {
enumerable: true,
configurable: true,
writable: true,
value: 0
});
Object.defineProperty(this, "data", {
enumerable: true,
configurable: true,
writable: true,
value: []
});
this.ctx = ctx;
this.init();
this.initResizeRow();
}
init() {
const { canvasElement, header, footer, database, config: { FOOTER_FIXED, SCROLLER_TRACK_SIZE = 0, HEIGHT, EMPTY_BODY_HEIGHT = 0, MAX_HEIGHT = 0, ENABLE_OFFSET_HEIGHT = 0, OFFSET_HEIGHT = 0, FOOTER_POSITION, }, } = this.ctx;
if (!header.width) {
return;
}
this.x = 0;
if (FOOTER_POSITION === 'top' && FOOTER_FIXED) {
this.y = header.height + footer.height; //更新body的y轴位置
}
else {
this.y = header.height;
}
const { data, sumHeight } = database.getData();
// 更新高度
this.height = sumHeight;
// 更新数据
this.data = data;
const { top } = canvasElement.getBoundingClientRect();
// 更新宽度
this.width = header.width;
this.visibleWidth = this.ctx.stageWidth - SCROLLER_TRACK_SIZE;
// 底部高度
const footerHeight = this.ctx.footer.height;
if (!this.data.length && !HEIGHT) {
this.height = EMPTY_BODY_HEIGHT;
}
else if (!this.data.length && HEIGHT) {
// 如果有设置高度的情况，空数据时，高度也要保持为设置的高度
this.height = HEIGHT - header.height - footerHeight - SCROLLER_TRACK_SIZE;
}
const isEmpty = !this.data.length ? 'empty' : 'not-empty';
this.ctx.emit('emptyChange', {
isEmpty,
type: isEmpty,
headerHeight: header.height,
bodyHeight: this.height,
footerHeight,
width: this.width,
height: !this.data.length ? EMPTY_BODY_HEIGHT + footerHeight : 0,
});
let containerHeight = this.height + header.height + SCROLLER_TRACK_SIZE;
// 如果有底部,加上底部高度
containerHeight += footerHeight;
let stageHeight = 0;
if (this.data.length && ENABLE_OFFSET_HEIGHT) {
const windowInnerHeight = window.innerHeight;
const visibleHeight = windowInnerHeight - top;
stageHeight = visibleHeight - OFFSET_HEIGHT;
if (stageHeight < 0) {
stageHeight = 32;
console.error('There is an error in the height calculation ENABLE_OFFSET_HEIGHT and OFFSET_HEIGHT are invalid');
}
}
else if (this.data.length && HEIGHT) {
stageHeight = HEIGHT;
}
else if (this.data.length && MAX_HEIGHT && containerHeight > MAX_HEIGHT) {
stageHeight = MAX_HEIGHT;
}
else {
stageHeight = containerHeight;
}
// 更新窗口高度
if (stageHeight > 0) {
// this.ctx.canvasElement.height = stageHeight;
this.ctx.stageHeight = Math.floor(stageHeight);
this.ctx.stageElement.style.height = `${this.ctx.stageHeight - 0.5}px`;
}
// 可视区高度
let _visibleHeight = this.ctx.stageHeight - header.height - SCROLLER_TRACK_SIZE;
// 底部高度,如果是固定底部,可视区减上底部高度
if (FOOTER_FIXED) {
this.visibleHeight = _visibleHeight - footerHeight;
}
else {
this.visibleHeight = _visibleHeight;
}
this.ctx.body.x = this.x;
this.ctx.body.y = this.y;
this.ctx.body.width = this.width;
this.ctx.body.height = this.height;
this.ctx.body.visibleWidth = this.visibleWidth;
this.ctx.body.visibleHeight = this.visibleHeight;
this.ctx.body.data = data;
const dpr = window.devicePixelRatio || 1; // 获取设备像素比
const canvasWidth = this.ctx.stageWidth * dpr;
const canvasHeight = this.ctx.stageHeight * dpr;
canvasElement.width = Math.floor(canvasWidth);
canvasElement.height = Math.floor(canvasHeight);
// 外层容器样式
this.ctx.canvasElement.setAttribute('style', ` height:${this.ctx.stageHeight}px;width:${this.ctx.stageWidth}px;`);
this.ctx.paint.scale(dpr);
}
// 调整行的高度
initResizeRow() {
const { config: { ENABLE_RESIZE_ROW }, } = this.ctx;
if (!ENABLE_RESIZE_ROW) {
return;
}
// 鼠标移动
this.ctx.on('mouseup', () => {
this.isMouseDown = false;
if (this.resizeDiff !== 0 && this.resizeTarget) {
// 调整宽度
this.resizeRow(this.resizeTarget, this.resizeDiff);
}
this.resizeTarget = null;
this.resizeDiff = 0;
this.isResizing = false;
//加个延时，修复拖动时，开始编辑的问题
setTimeout(() => {
this.ctx.rowResizing = false;
}, 0);
this.clientY = 0;
});
this.ctx.on('mousedown', (e) => {
if (!this.ctx.isTarget()) {
return;
}
this.clientY = e.clientY;
if (this.resizeTarget) {
this.isResizing = true;
// 传递给上下文，防止其他事件触发，行调整大小时，不触发选择器
this.ctx.rowResizing = true;
}
else {
this.isResizing = false;
this.ctx.rowResizing = false;
}
this.isMouseDown = true;
});
this.ctx.on('mousemove', (e) => {
// 编辑中不触发mousemove
if (this.ctx.editing)
return;
const { offsetY, offsetX } = this.ctx.getOffset(e);
const y = offsetY;
const x = offsetX;
const clientY = e.clientY;
const { stageHeight, scrollY, config: { RESIZE_ROW_MIN_HEIGHT = 0 }, } = this.ctx;
if (this.isResizing && this.resizeTarget) {
const resizeTargetHeight = this.resizeTarget.height;
let diff = clientY - this.clientY;
if (diff + resizeTargetHeight < RESIZE_ROW_MIN_HEIGHT) {
diff = -(resizeTargetHeight - RESIZE_ROW_MIN_HEIGHT);
}
this.resizeDiff = diff;
this.ctx.emit('draw');
}
else {
this.resizeTarget = null;
// 按下时不改变样式，有可能是多选表头
if (this.isMouseDown) {
return;
}
// 如果是拖动选择
if (this.ctx.stageElement.style.cursor === 'crosshair') {
return;
}
if (this.ctx.stageElement.style.cursor === 'row-resize') {
// 恢复默认样式
this.ctx.stageElement.style.cursor = 'default';
}
for (let i = 0; i < this.renderRows.length; i++) {
const row = this.renderRows[i];
const isYRange = y > row.y - scrollY + row.height - 1.5 &&
y < row.y - scrollY + row.height + 1.5 &&
y < stageHeight - 4;
if (isYRange) {
for (let j = 0; j < row.cells.length; j++) {
const cell = row.cells[j];
if (x > cell.drawX + 10 &&
x < cell.drawX + cell.width - 10 &&
cell.rowspan === 1 //没有被合并的单元格
) {
this.ctx.stageElement.style.cursor = 'row-resize';
this.resizeTarget = row;
}
}
}
}
}
});
}
resizeRow(row, diff) {
const { rowIndex, height, rowKey, data } = row;
this.ctx.database.setRowHeight(rowIndex, height + diff);
this.init();
this.ctx.emit('draw');
this.ctx.emit('resizeRowChange', {
rowIndex,
oldHeight: height,
height: height + diff,
rowKey,
row: data,
data: this.data,
});
}
drawTipLine() {
if (this.isResizing && this.resizeTarget) {
const { stageWidth, scrollY, config: { RESIZE_ROW_LINE_COLOR }, } = this.ctx;
const resizeTargetDrawY = this.resizeTarget.y - scrollY;
const resizeTargetHeight = this.resizeTarget.height;
const y = resizeTargetDrawY + resizeTargetHeight + this.resizeDiff - 0.5;
const poins = [0, y - 0.5, stageWidth, y - 0.5];
this.ctx.paint.drawLine(poins, {
borderColor: RESIZE_ROW_LINE_COLOR,
borderWidth: 1,
});
}
}
drawFiexShadow() {
const { fixedLeftWidth, fixedRightWidth, scrollX, header, stageWidth, config: { HEADER_BG_COLOR, SCROLLER_TRACK_SIZE }, } = this.ctx;
if (scrollX > 0 && fixedLeftWidth !== 0) {
this.ctx.paint.drawShadow(this.x, this.y, fixedLeftWidth, this.height, {
fillColor: HEADER_BG_COLOR,
side: 'right',
shadowWidth: 4,
colorStart: 'rgba(0,0,0,0.1)',
colorEnd: 'rgba(0,0,0,0)',
});
}
// 右边阴影
if (scrollX < Math.floor(header.width - stageWidth - 1) && fixedRightWidth !== SCROLLER_TRACK_SIZE) {
const x = header.width - (this.x + this.width) + stageWidth - fixedRightWidth;
this.ctx.paint.drawShadow(x + 1, this.y, fixedRightWidth, this.height, {
fillColor: HEADER_BG_COLOR,
side: 'left',
shadowWidth: 4,
colorStart: 'rgba(0,0,0,0)',
colorEnd: 'rgba(0,0,0,0.1)',
});
}
}
binarySearch(list, value) {
let start = 0;
let end = list.length - 1;
let tempIndex = -1;
while (start <= end) {
let midIndex = Math.floor((start + end) / 2);
let midValue = list[midIndex].bottom;
if (midValue === value) {
return midIndex;
}
else if (midValue < value) {
start = midIndex + 1;
}
else {
tempIndex = midIndex; // 记录当前的 midIndex
end = midIndex - 1;
}
}
return tempIndex;
}
update() {
this.init();
const { header, database, scrollY } = this.ctx;
const offset = scrollY;
const { data, positions } = database.getData();
// 更新最大行数
this.ctx.maxRowIndex = data.length - 1;
const _headIndex = this.binarySearch(positions, offset);
let _tailIndex = this.binarySearch(positions, offset + this.visibleHeight);
// 找不到就为data.length
if (_tailIndex === -1) {
_tailIndex = data.length;
}
this.headIndex = Math.max(0, _headIndex);
this.tailIndex = Math.min(this.ctx.maxRowIndex, _tailIndex + 1);
this.visibleRows = data.slice(this.headIndex, this.tailIndex + 1);
this.ctx.body.headIndex = this.headIndex;
this.ctx.body.tailIndex = this.tailIndex;
this.ctx.body.visibleRows = this.visibleRows;
const rows = [];
for (let i = 0; i < this.visibleRows.length; i++) {
const index = this.headIndex + i;
const data = this.visibleRows[i];
const { height, top } = this.ctx.database.getPositionForRowIndex(index);
const row = new Row(this.ctx, index, 0, top + this.y, header.width, height, data);
rows.push(row);
}
this.renderRows = rows;
this.ctx.body.renderRows = rows;
}
draw() {
this.renderRows.forEach((row) => {
row.drawCenter();
});
this.drawFiexShadow();
this.renderRows.forEach((row) => {
row.drawFixed();
});
this.drawTipLine();
}
}
//# sourceMappingURL=Body.js.map