update at 2026-02-13 22:26:53
This commit is contained in:
douboer@gmail.com
@@ -1,12 +1,419 @@
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const { parseTableByFileName, buildSankeyData } = require('../../utils/sankey');
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/**
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* 将表头标准化，便于做中英文别名匹配。
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*/
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function normalizeHeaderName(header) {
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return String(header || '')
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.trim()
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.toLowerCase()
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.replace(/[\s_-]+/g, '');
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}
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/**
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* 根据候选别名查找列索引。
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*/
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function findHeaderIndex(headers, aliases) {
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const aliasSet = {};
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aliases.forEach((item) => {
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aliasSet[normalizeHeaderName(item)] = true;
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});
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for (let i = 0; i < headers.length; i += 1) {
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if (aliasSet[normalizeHeaderName(headers[i])]) {
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return i;
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}
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}
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return -1;
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}
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/**
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* 判断文本是否可作为数值。
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*/
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function isNumericCell(text) {
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const normalized = String(text || '')
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.replace(/,/g, '')
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.trim();
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if (!normalized) {
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return false;
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}
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return !Number.isNaN(Number(normalized));
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}
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/**
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* 取第二行中的首个数字列索引。
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*/
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function findNumericColumnFromSecondRow(rows) {
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const secondRow = rows[0] || [];
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for (let i = 0; i < secondRow.length; i += 1) {
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if (isNumericCell(secondRow[i])) {
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return i;
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}
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}
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return -1;
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}
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/**
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* 从文件名中提取后缀（不含点）。
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*/
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function getFileExtension(fileName) {
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const lowerName = String(fileName || '').toLowerCase();
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const lastDotIndex = lowerName.lastIndexOf('.');
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if (lastDotIndex < 0) {
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return '';
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}
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return lowerName.slice(lastDotIndex + 1);
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}
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/**
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* 节点配色：与当前画布渲染保持一致，双色交替。
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*/
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function getNodeColor(index) {
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return index % 2 === 0 ? '#9b6bc2' : '#7e95f7';
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}
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/**
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* 标签纵向位置：小节点也能保持可读，不贴边。
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*/
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function getNodeLabelCenterY(nodeHeight) {
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return Math.min(12, Math.max(8, nodeHeight / 2));
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}
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/**
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* 构建导出文件时间戳，格式与 Web 保持一致。
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*/
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function formatFileTimestamp() {
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const now = new Date();
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const pad = (value) => String(value).padStart(2, '0');
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return `${now.getFullYear()}${pad(now.getMonth() + 1)}${pad(now.getDate())}_${pad(now.getHours())}${pad(
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now.getMinutes()
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)}${pad(now.getSeconds())}`;
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}
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/**
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* SVG 文本转义，避免标签名包含特殊字符导致 XML 非法。
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*/
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function escapeSvgText(text) {
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return String(text || '')
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, ''');
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}
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/**
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* SVG 数值输出做轻量格式化，避免太长小数。
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*/
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function formatSvgNumber(value) {
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const normalized = Number(value || 0);
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if (!Number.isFinite(normalized)) {
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return '0';
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}
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return String(Number(normalized.toFixed(2)));
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}
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/**
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* 下拉选项：与 Web 手机端保持一致。
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*/
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const GAP_OPTIONS = [0, 5, 10, 15, 20, 25, 30];
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const PADDING_OPTIONS = [0, 10, 20, 30, 40, 50, 60, 70, 80];
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const LABEL_POSITION_OPTIONS = [
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{ value: 'inner', label: '内' },
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{ value: 'outer', label: '外' },
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{ value: 'left', label: '左' },
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{ value: 'right', label: '右' }
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];
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const TARGET_ALIGN_OPTIONS = [
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{ value: 'between', label: '两端' },
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{ value: 'middle', label: '中间' },
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{ value: 'top', label: '顶部' },
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{ value: 'bottom', label: '底部' }
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];
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/**
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* 数值限制，避免 UI 参数导致布局异常。
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*/
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function clampNumber(value, min, max, fallback) {
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const normalized = Number(value);
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if (!Number.isFinite(normalized)) {
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return fallback;
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}
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return Math.min(max, Math.max(min, normalized));
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}
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/**
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* 方向切换：target->source 时对连线做镜像翻转。
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*/
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function applyDirection(links, direction) {
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if (!Array.isArray(links)) {
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return [];
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}
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if (direction !== 'target-to-source') {
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return links;
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}
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return links.map((link) => ({
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source: link.target,
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target: link.source,
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value: link.value
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}));
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}
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/**
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* 根据标签位置模式返回 Canvas 文本绘制参数。
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*/
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function getCanvasLabelPlacement(layout, isSource, labelPositionMode) {
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const sourceInnerX = layout.leftX + layout.nodeWidth + 4;
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const sourceOuterX = Math.max(2, layout.leftX - 4);
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const targetInnerX = Math.max(2, layout.rightX - 4);
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const targetOuterX = layout.rightX + layout.nodeWidth + 4;
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if (labelPositionMode === 'outer') {
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return isSource
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? { x: sourceOuterX, textAlign: 'right' }
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: { x: targetOuterX, textAlign: 'left' };
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}
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if (labelPositionMode === 'left') {
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return isSource
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? { x: sourceOuterX, textAlign: 'right' }
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: { x: targetInnerX, textAlign: 'right' };
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}
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if (labelPositionMode === 'right') {
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return isSource
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? { x: sourceInnerX, textAlign: 'left' }
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: { x: targetOuterX, textAlign: 'left' };
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}
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return isSource
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? { x: sourceInnerX, textAlign: 'left' }
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: { x: targetInnerX, textAlign: 'right' };
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}
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/**
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* 根据标签位置模式返回 SVG 文本锚点参数。
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*/
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function getSvgLabelPlacement(layout, isSource, labelPositionMode) {
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const canvasPlacement = getCanvasLabelPlacement(layout, isSource, labelPositionMode);
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return {
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x: canvasPlacement.x,
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textAnchor: canvasPlacement.textAlign === 'right' ? 'end' : 'start'
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};
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}
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/**
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* 统一生成桑基图布局数据，供 canvas 渲染与 SVG 导出共用。
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*/
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function buildSankeyLayout(links, width, height, renderOptions) {
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if (!Array.isArray(links) || links.length === 0) {
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return null;
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}
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const nodeGap = clampNumber(renderOptions && renderOptions.nodeGap, 0, 60, 8);
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const padding = clampNumber(renderOptions && renderOptions.chartPadding, 0, 120, 16);
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const targetAlignMode = (renderOptions && renderOptions.targetAlignMode) || 'between';
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const nodeWidth = 10;
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const leftX = padding;
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const rightX = Math.max(padding + nodeWidth + 80, width - padding - nodeWidth);
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const sourceValueMap = {};
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const targetValueMap = {};
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links.forEach((link) => {
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sourceValueMap[link.source] = (sourceValueMap[link.source] || 0) + Number(link.value || 0);
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targetValueMap[link.target] = (targetValueMap[link.target] || 0) + Number(link.value || 0);
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});
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const sourceNames = Object.keys(sourceValueMap);
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const targetNames = Object.keys(targetValueMap);
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const totalValue = sourceNames.reduce((sum, name) => sum + sourceValueMap[name], 0);
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if (totalValue <= 0) {
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return null;
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}
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const sourceGapCount = Math.max(0, sourceNames.length - 1);
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const sourceContentHeight = Math.max(10, height - padding * 2 - sourceGapCount * nodeGap);
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const sourceUnitHeight = sourceContentHeight / totalValue;
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const sourcePos = {};
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let sourceCursorY = padding;
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sourceNames.forEach((name) => {
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const nodeHeight = Math.max(2, sourceValueMap[name] * sourceUnitHeight);
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sourcePos[name] = { y: sourceCursorY, h: nodeHeight };
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sourceCursorY += nodeHeight + nodeGap;
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});
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const targetGapCount = Math.max(0, targetNames.length - 1);
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const targetTotalValue = targetNames.reduce((sum, name) => sum + targetValueMap[name], 0);
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const targetUnitHeight = targetTotalValue > 0 ? sourceUnitHeight : 0;
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const targetTotalNodeHeight = targetTotalValue * targetUnitHeight;
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const targetBlockHeight = targetTotalNodeHeight + targetGapCount * nodeGap;
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const layoutHeight = Math.max(10, height - padding * 2);
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let targetStartY = padding;
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if (targetAlignMode === 'middle') {
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targetStartY = padding + Math.max(0, (layoutHeight - targetBlockHeight) / 2);
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} else if (targetAlignMode === 'bottom') {
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targetStartY = padding + Math.max(0, layoutHeight - targetBlockHeight);
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} else if (targetAlignMode === 'top') {
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targetStartY = padding;
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}
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const targetPos = {};
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let targetCursorY = targetStartY;
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targetNames.forEach((name) => {
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const nodeHeight = Math.max(2, targetValueMap[name] * targetUnitHeight);
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targetPos[name] = { y: targetCursorY, h: nodeHeight };
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targetCursorY += nodeHeight + nodeGap;
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});
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const sourceOffset = {};
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const targetOffset = {};
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sourceNames.forEach((name) => {
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sourceOffset[name] = 0;
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});
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targetNames.forEach((name) => {
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targetOffset[name] = 0;
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});
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const linkSegments = [];
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links.forEach((link) => {
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const sourceNode = sourcePos[link.source];
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const targetNode = targetPos[link.target];
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if (!sourceNode || !targetNode) {
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return;
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}
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const linkHeight = Math.max(1, Number(link.value || 0) * sourceUnitHeight);
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const sy = sourceNode.y + sourceOffset[link.source] + linkHeight / 2;
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const ty = targetNode.y + targetOffset[link.target] + linkHeight / 2;
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sourceOffset[link.source] += linkHeight;
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targetOffset[link.target] += linkHeight;
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const startX = leftX + nodeWidth;
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const endX = rightX;
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const controlX = (startX + endX) / 2;
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linkSegments.push({
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startX,
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endX,
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controlX,
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sy,
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ty,
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linkHeight
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});
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});
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return {
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leftX,
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rightX,
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nodeWidth,
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sourceNames,
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targetNames,
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sourcePos,
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targetPos,
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linkSegments
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};
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}
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/**
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* 基于布局结果构建可下载的 SVG 字符串。
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*/
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function buildSankeySvgText(links, width, height, renderOptions) {
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const layout = buildSankeyLayout(links, width, height, renderOptions);
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if (!layout) {
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return '';
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}
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const labelPositionMode = (renderOptions && renderOptions.labelPositionMode) || 'inner';
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const segments = [];
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segments.push(
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`<svg xmlns="http://www.w3.org/2000/svg" width="${formatSvgNumber(width)}" height="${formatSvgNumber(
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height
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)}" viewBox="0 0 ${formatSvgNumber(width)} ${formatSvgNumber(height)}">`
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);
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segments.push(
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`<rect x="0" y="0" width="${formatSvgNumber(width)}" height="${formatSvgNumber(height)}" fill="#f7f8fa" />`
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);
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layout.linkSegments.forEach((segment) => {
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const pathData = `M ${formatSvgNumber(segment.startX)} ${formatSvgNumber(segment.sy)} C ${formatSvgNumber(
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segment.controlX
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)} ${formatSvgNumber(segment.sy)} ${formatSvgNumber(segment.controlX)} ${formatSvgNumber(segment.ty)} ${formatSvgNumber(
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segment.endX
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)} ${formatSvgNumber(segment.ty)}`;
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segments.push(
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`<path d="${pathData}" fill="none" stroke="#9b6bc2" stroke-opacity="0.35" stroke-width="${formatSvgNumber(
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segment.linkHeight
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)}" stroke-linecap="round" />`
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);
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});
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layout.sourceNames.forEach((name, index) => {
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const node = layout.sourcePos[name];
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const textY = node.y + getNodeLabelCenterY(node.h);
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const textPlacement = getSvgLabelPlacement(layout, true, labelPositionMode);
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segments.push(
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`<rect x="${formatSvgNumber(layout.leftX)}" y="${formatSvgNumber(node.y)}" width="${formatSvgNumber(
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layout.nodeWidth
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)}" height="${formatSvgNumber(node.h)}" fill="${getNodeColor(index)}" />`
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);
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segments.push(
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`<text x="${formatSvgNumber(textPlacement.x)}" y="${formatSvgNumber(textY)}" fill="#4e5969" font-size="10" text-anchor="${
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textPlacement.textAnchor
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}" dominant-baseline="middle">${escapeSvgText(name)}</text>`
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);
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});
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layout.targetNames.forEach((name, index) => {
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const node = layout.targetPos[name];
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const textY = node.y + getNodeLabelCenterY(node.h);
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const textPlacement = getSvgLabelPlacement(layout, false, labelPositionMode);
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segments.push(
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`<rect x="${formatSvgNumber(layout.rightX)}" y="${formatSvgNumber(node.y)}" width="${formatSvgNumber(
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layout.nodeWidth
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)}" height="${formatSvgNumber(node.h)}" fill="${getNodeColor(index)}" />`
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);
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segments.push(
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`<text x="${formatSvgNumber(textPlacement.x)}" y="${formatSvgNumber(textY)}" fill="#4e5969" font-size="10" text-anchor="${
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textPlacement.textAnchor
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}" dominant-baseline="middle">${escapeSvgText(name)}</text>`
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);
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});
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segments.push('</svg>');
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return segments.join('\n');
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}
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Page({
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data: {
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selectedThemeIndex: 1,
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sourceColumns: ['列1', '列2'],
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targetColumns: ['列1', '列2'],
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sourceDataIndex: 1,
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sourceDescChecked: [1],
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targetDescChecked: [1],
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showThemeSheet: false
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showThemeSheet: false,
|
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uploadMessage: '点击上传或将csv/xls文件拖到这里上传',
|
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parseError: '',
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buildError: '',
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columnHeaders: ['列1', '列2', '列3'],
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tableRows: [],
|
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sourceDataColumn: null,
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sourceDescriptionColumns: [],
|
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targetDescriptionColumns: [],
|
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nodesCount: 0,
|
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linksCount: 0,
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droppedRows: 0,
|
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buildWarnings: [],
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infoLogs: ['解析信息: 尚未加载数据文件'],
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sankeyLinks: [],
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sankeyNodes: [],
|
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gapOptions: GAP_OPTIONS,
|
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gapOptionIndex: 1,
|
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nodeGap: GAP_OPTIONS[1],
|
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paddingOptions: PADDING_OPTIONS,
|
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paddingOptionIndex: 2,
|
||||
chartPadding: PADDING_OPTIONS[2],
|
||||
direction: 'source-to-target',
|
||||
labelPositionOptionLabels: LABEL_POSITION_OPTIONS.map((item) => item.label),
|
||||
labelPositionValues: LABEL_POSITION_OPTIONS.map((item) => item.value),
|
||||
labelPositionIndex: 0,
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||||
labelPositionMode: LABEL_POSITION_OPTIONS[0].value,
|
||||
targetAlignOptionLabels: TARGET_ALIGN_OPTIONS.map((item) => item.label),
|
||||
targetAlignValues: TARGET_ALIGN_OPTIONS.map((item) => item.value),
|
||||
targetAlignIndex: 0,
|
||||
targetAlignMode: TARGET_ALIGN_OPTIONS[0].value
|
||||
},
|
||||
|
||||
/**
|
||||
@@ -21,5 +428,538 @@ Page({
|
||||
*/
|
||||
onCloseThemeSheet() {
|
||||
this.setData({ showThemeSheet: false });
|
||||
},
|
||||
|
||||
/**
|
||||
* 更新“节点间距”下拉值并立即重绘。
|
||||
*/
|
||||
onChangeGap(e) {
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||||
const pickedIndex = Number(e.detail && e.detail.value);
|
||||
const safeIndex = Number.isFinite(pickedIndex) ? pickedIndex : 0;
|
||||
const nextValue = this.data.gapOptions[safeIndex];
|
||||
this.setData(
|
||||
{
|
||||
gapOptionIndex: safeIndex,
|
||||
nodeGap: Number.isFinite(nextValue) ? nextValue : this.data.nodeGap
|
||||
},
|
||||
() => {
|
||||
this.drawSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
/**
|
||||
* 更新“预览边距”下拉值并立即重绘。
|
||||
*/
|
||||
onChangePadding(e) {
|
||||
const pickedIndex = Number(e.detail && e.detail.value);
|
||||
const safeIndex = Number.isFinite(pickedIndex) ? pickedIndex : 0;
|
||||
const nextValue = this.data.paddingOptions[safeIndex];
|
||||
this.setData(
|
||||
{
|
||||
paddingOptionIndex: safeIndex,
|
||||
chartPadding: Number.isFinite(nextValue) ? nextValue : this.data.chartPadding
|
||||
},
|
||||
() => {
|
||||
this.drawSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
/**
|
||||
* 切换连线方向（source->target / target->source）。
|
||||
*/
|
||||
onToggleDirection() {
|
||||
this.setData(
|
||||
{
|
||||
direction:
|
||||
this.data.direction === 'source-to-target' ? 'target-to-source' : 'source-to-target'
|
||||
},
|
||||
() => {
|
||||
this.drawSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
/**
|
||||
* 更新标签位置模式并重绘。
|
||||
*/
|
||||
onChangeLabelPosition(e) {
|
||||
const pickedIndex = Number(e.detail && e.detail.value);
|
||||
const safeIndex = Number.isFinite(pickedIndex) ? pickedIndex : 0;
|
||||
const nextMode = this.data.labelPositionValues[safeIndex];
|
||||
this.setData(
|
||||
{
|
||||
labelPositionIndex: safeIndex,
|
||||
labelPositionMode: nextMode || 'inner'
|
||||
},
|
||||
() => {
|
||||
this.drawSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
/**
|
||||
* 更新汇聚对齐模式并重绘。
|
||||
*/
|
||||
onChangeTargetAlign(e) {
|
||||
const pickedIndex = Number(e.detail && e.detail.value);
|
||||
const safeIndex = Number.isFinite(pickedIndex) ? pickedIndex : 0;
|
||||
const nextMode = this.data.targetAlignValues[safeIndex];
|
||||
this.setData(
|
||||
{
|
||||
targetAlignIndex: safeIndex,
|
||||
targetAlignMode: nextMode || 'between'
|
||||
},
|
||||
() => {
|
||||
this.drawSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
/**
|
||||
* 页面 ready 后绘制一次空白画布，避免首次显示延迟。
|
||||
*/
|
||||
onReady() {
|
||||
this.drawSankey();
|
||||
},
|
||||
|
||||
/**
|
||||
* 上传数据文件并解析为表头与数据行。
|
||||
*/
|
||||
onChooseFile() {
|
||||
const that = this;
|
||||
wx.chooseMessageFile({
|
||||
count: 1,
|
||||
type: 'file',
|
||||
extension: ['csv', 'xls', 'xlsx'],
|
||||
success(res) {
|
||||
const picked = res.tempFiles && res.tempFiles[0];
|
||||
if (!picked) {
|
||||
return;
|
||||
}
|
||||
const filePath = picked.path;
|
||||
const fileName = picked.name || 'unknown.csv';
|
||||
const extension = getFileExtension(fileName);
|
||||
const isCsvFile = extension === 'csv';
|
||||
const readOptions = {
|
||||
filePath,
|
||||
success(readRes) {
|
||||
try {
|
||||
const filePayload = isCsvFile ? String(readRes.data || '') : readRes.data;
|
||||
const table = parseTableByFileName(fileName, filePayload);
|
||||
that.applyParsedTable(table, fileName);
|
||||
} catch (error) {
|
||||
that.setData({
|
||||
parseError: error && error.message ? error.message : '文件解析失败'
|
||||
});
|
||||
that.refreshInfoLogs();
|
||||
}
|
||||
},
|
||||
fail(err) {
|
||||
that.setData({
|
||||
parseError: `读取文件失败: ${err && err.errMsg ? err.errMsg : '未知错误'}`
|
||||
});
|
||||
that.refreshInfoLogs();
|
||||
}
|
||||
};
|
||||
if (isCsvFile) {
|
||||
readOptions.encoding = 'utf8';
|
||||
}
|
||||
wx.getFileSystemManager().readFile(readOptions);
|
||||
},
|
||||
fail(err) {
|
||||
if (err && String(err.errMsg || '').indexOf('cancel') >= 0) {
|
||||
return;
|
||||
}
|
||||
that.setData({
|
||||
parseError: `选择文件失败: ${err && err.errMsg ? err.errMsg : '未知错误'}`
|
||||
});
|
||||
that.refreshInfoLogs();
|
||||
}
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* 应用解析结果，并按 Web 规则设置默认映射后触发重建。
|
||||
*/
|
||||
applyParsedTable(table, fileName) {
|
||||
const headers = table.headers || [];
|
||||
const rows = table.rows || [];
|
||||
const sourceByName = findHeaderIndex(headers, ['data', 'value', '数据', '值']);
|
||||
const sourceBySecondRow = findNumericColumnFromSecondRow(rows);
|
||||
const sourceDescByName = findHeaderIndex(headers, ['source', '源']);
|
||||
const targetDescByName = findHeaderIndex(headers, ['target', '目标']);
|
||||
|
||||
const sourceDataColumn =
|
||||
sourceByName >= 0 ? sourceByName : sourceBySecondRow >= 0 ? sourceBySecondRow : null;
|
||||
const sourceDescriptionColumns = sourceDescByName >= 0 ? [sourceDescByName] : [];
|
||||
const targetDescriptionColumns = targetDescByName >= 0 ? [targetDescByName] : [];
|
||||
|
||||
this.setData(
|
||||
{
|
||||
uploadMessage: `已加载: ${fileName}（${rows.length} 行）`,
|
||||
parseError: '',
|
||||
buildError: '',
|
||||
columnHeaders: headers.length > 0 ? headers : ['列1', '列2', '列3'],
|
||||
tableRows: rows,
|
||||
sourceDataColumn,
|
||||
sourceDescriptionColumns,
|
||||
targetDescriptionColumns
|
||||
},
|
||||
() => {
|
||||
this.rebuildSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
onSelectSourceData(e) {
|
||||
const index = Number(e.currentTarget.dataset.index);
|
||||
this.setData(
|
||||
{
|
||||
sourceDataColumn: Number.isNaN(index) ? null : index
|
||||
},
|
||||
() => {
|
||||
this.rebuildSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
onToggleSourceDesc(e) {
|
||||
const index = Number(e.currentTarget.dataset.index);
|
||||
if (Number.isNaN(index)) {
|
||||
return;
|
||||
}
|
||||
const current = this.data.sourceDescriptionColumns || [];
|
||||
const exists = current.indexOf(index) >= 0;
|
||||
const next = exists
|
||||
? current.filter((item) => item !== index)
|
||||
: current.concat(index).sort((a, b) => a - b);
|
||||
this.setData(
|
||||
{
|
||||
sourceDescriptionColumns: next
|
||||
},
|
||||
() => {
|
||||
this.rebuildSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
onToggleTargetDesc(e) {
|
||||
const index = Number(e.currentTarget.dataset.index);
|
||||
if (Number.isNaN(index)) {
|
||||
return;
|
||||
}
|
||||
const current = this.data.targetDescriptionColumns || [];
|
||||
const exists = current.indexOf(index) >= 0;
|
||||
const next = exists
|
||||
? current.filter((item) => item !== index)
|
||||
: current.concat(index).sort((a, b) => a - b);
|
||||
this.setData(
|
||||
{
|
||||
targetDescriptionColumns: next
|
||||
},
|
||||
() => {
|
||||
this.rebuildSankey();
|
||||
}
|
||||
);
|
||||
},
|
||||
|
||||
/**
|
||||
* 根据当前映射重建聚合结果，输出统计与告警。
|
||||
*/
|
||||
rebuildSankey() {
|
||||
const headers = this.data.columnHeaders || [];
|
||||
const rows = this.data.tableRows || [];
|
||||
if (rows.length === 0) {
|
||||
this.setData({
|
||||
nodesCount: 0,
|
||||
linksCount: 0,
|
||||
droppedRows: 0,
|
||||
buildWarnings: [],
|
||||
buildError: '',
|
||||
sankeyLinks: [],
|
||||
sankeyNodes: []
|
||||
});
|
||||
this.refreshInfoLogs();
|
||||
this.drawSankey();
|
||||
return;
|
||||
}
|
||||
|
||||
try {
|
||||
const result = buildSankeyData(
|
||||
{
|
||||
headers,
|
||||
rows
|
||||
},
|
||||
{
|
||||
sourceDataColumn: this.data.sourceDataColumn,
|
||||
sourceDescriptionColumns: this.data.sourceDescriptionColumns || [],
|
||||
targetDescriptionColumns: this.data.targetDescriptionColumns || [],
|
||||
delimiter: '-'
|
||||
}
|
||||
);
|
||||
|
||||
this.setData({
|
||||
nodesCount: result.nodes.length,
|
||||
linksCount: result.links.length,
|
||||
droppedRows: result.meta.droppedRows,
|
||||
buildWarnings: (result.meta.warnings || []).slice(0, 8),
|
||||
buildError: '',
|
||||
sankeyLinks: result.links || [],
|
||||
sankeyNodes: result.nodes || []
|
||||
});
|
||||
} catch (error) {
|
||||
this.setData({
|
||||
nodesCount: 0,
|
||||
linksCount: 0,
|
||||
droppedRows: 0,
|
||||
buildWarnings: [],
|
||||
buildError: error && error.message ? error.message : '聚合失败',
|
||||
sankeyLinks: [],
|
||||
sankeyNodes: []
|
||||
});
|
||||
}
|
||||
|
||||
this.refreshInfoLogs();
|
||||
this.drawSankey();
|
||||
},
|
||||
|
||||
/**
|
||||
* 汇总日志到“信息日志”区域。
|
||||
*/
|
||||
refreshInfoLogs() {
|
||||
const logs = [];
|
||||
const rows = this.data.tableRows || [];
|
||||
const headers = this.data.columnHeaders || [];
|
||||
if (rows.length > 0) {
|
||||
logs.push(`解析信息: 已加载 ${rows.length} 行，${headers.length} 列`);
|
||||
logs.push(`解析信息: 已生成 ${this.data.nodesCount} 个节点，${this.data.linksCount} 条连线`);
|
||||
} else {
|
||||
logs.push('解析信息: 尚未加载数据文件');
|
||||
}
|
||||
|
||||
if (this.data.parseError) {
|
||||
logs.push(`错误: ${this.data.parseError}`);
|
||||
}
|
||||
if (this.data.buildError) {
|
||||
logs.push(`错误: ${this.data.buildError}`);
|
||||
}
|
||||
if (this.data.droppedRows > 0) {
|
||||
logs.push(`告警: 已跳过 ${this.data.droppedRows} 行异常数据`);
|
||||
}
|
||||
|
||||
(this.data.buildWarnings || []).forEach((warning) => {
|
||||
logs.push(`告警: ${warning}`);
|
||||
});
|
||||
|
||||
this.setData({
|
||||
infoLogs: logs.length > 0 ? logs : ['暂无日志']
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* 在小程序 canvas 上绘制简化版桑基图。
|
||||
* 说明：
|
||||
* - 不依赖第三方图表库，保证小程序端零额外依赖可运行
|
||||
* - 布局规则尽量对齐 Web：左 source、右 target、按值缩放高度
|
||||
*/
|
||||
drawSankey() {
|
||||
const rawLinks = this.data.sankeyLinks || [];
|
||||
const links = applyDirection(rawLinks, this.data.direction);
|
||||
const query = wx.createSelectorQuery().in(this);
|
||||
query.select('#sankeyCanvas').boundingClientRect();
|
||||
query.exec((res) => {
|
||||
const rect = res && res[0];
|
||||
if (!rect || !rect.width || !rect.height) {
|
||||
return;
|
||||
}
|
||||
|
||||
const width = rect.width;
|
||||
const height = rect.height;
|
||||
const ctx = wx.createCanvasContext('sankeyCanvas', this);
|
||||
ctx.clearRect(0, 0, width, height);
|
||||
ctx.setFillStyle('#f7f8fa');
|
||||
ctx.fillRect(0, 0, width, height);
|
||||
|
||||
const layout = buildSankeyLayout(links, width, height, {
|
||||
nodeGap: this.data.nodeGap,
|
||||
chartPadding: this.data.chartPadding,
|
||||
targetAlignMode: this.data.targetAlignMode
|
||||
});
|
||||
if (!layout) {
|
||||
ctx.setFillStyle('#86909c');
|
||||
ctx.setFontSize(12);
|
||||
ctx.fillText('暂无可预览数据', 12, 24);
|
||||
ctx.draw();
|
||||
return;
|
||||
}
|
||||
|
||||
layout.linkSegments.forEach((segment) => {
|
||||
ctx.setStrokeStyle('rgba(155,107,194,0.35)');
|
||||
ctx.setLineWidth(segment.linkHeight);
|
||||
ctx.setLineCap('round');
|
||||
ctx.beginPath();
|
||||
ctx.moveTo(segment.startX, segment.sy);
|
||||
ctx.bezierCurveTo(
|
||||
segment.controlX,
|
||||
segment.sy,
|
||||
segment.controlX,
|
||||
segment.ty,
|
||||
segment.endX,
|
||||
segment.ty
|
||||
);
|
||||
ctx.stroke();
|
||||
});
|
||||
|
||||
layout.sourceNames.forEach((name, index) => {
|
||||
const node = layout.sourcePos[name];
|
||||
const labelPlacement = getCanvasLabelPlacement(layout, true, this.data.labelPositionMode);
|
||||
ctx.setFillStyle(getNodeColor(index));
|
||||
ctx.fillRect(layout.leftX, node.y, layout.nodeWidth, node.h);
|
||||
ctx.setFillStyle('#4e5969');
|
||||
ctx.setFontSize(10);
|
||||
ctx.setTextAlign(labelPlacement.textAlign);
|
||||
ctx.setTextBaseline('middle');
|
||||
ctx.fillText(name, labelPlacement.x, node.y + getNodeLabelCenterY(node.h));
|
||||
});
|
||||
|
||||
layout.targetNames.forEach((name, index) => {
|
||||
const node = layout.targetPos[name];
|
||||
const labelPlacement = getCanvasLabelPlacement(layout, false, this.data.labelPositionMode);
|
||||
ctx.setFillStyle(getNodeColor(index));
|
||||
ctx.fillRect(layout.rightX, node.y, layout.nodeWidth, node.h);
|
||||
ctx.setFillStyle('#4e5969');
|
||||
ctx.setFontSize(10);
|
||||
ctx.setTextAlign(labelPlacement.textAlign);
|
||||
ctx.setTextBaseline('middle');
|
||||
ctx.fillText(name, labelPlacement.x, node.y + getNodeLabelCenterY(node.h));
|
||||
});
|
||||
|
||||
ctx.draw();
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* 小程序端目前仅支持 PNG 导出（保存到相册）。
|
||||
*/
|
||||
onExportPng() {
|
||||
const that = this;
|
||||
wx.canvasToTempFilePath(
|
||||
{
|
||||
canvasId: 'sankeyCanvas',
|
||||
fileType: 'png',
|
||||
success(res) {
|
||||
wx.saveImageToPhotosAlbum({
|
||||
filePath: res.tempFilePath,
|
||||
success() {
|
||||
wx.showToast({
|
||||
title: 'PNG 已保存到相册',
|
||||
icon: 'success'
|
||||
});
|
||||
},
|
||||
fail(err) {
|
||||
wx.showToast({
|
||||
title: err && err.errMsg ? '保存失败，请检查相册权限' : '保存失败',
|
||||
icon: 'none'
|
||||
});
|
||||
}
|
||||
});
|
||||
},
|
||||
fail() {
|
||||
wx.showToast({
|
||||
title: '导出 PNG 失败',
|
||||
icon: 'none'
|
||||
});
|
||||
}
|
||||
},
|
||||
that
|
||||
);
|
||||
},
|
||||
|
||||
/**
|
||||
* 小程序 SVG 导出：
|
||||
* - 使用与画布一致的布局算法生成 SVG 字符串
|
||||
* - 写入用户数据目录，支持后续转发/分享
|
||||
*/
|
||||
onExportSvg() {
|
||||
const rawLinks = this.data.sankeyLinks || [];
|
||||
const links = applyDirection(rawLinks, this.data.direction);
|
||||
if (!Array.isArray(links) || links.length === 0) {
|
||||
wx.showToast({
|
||||
title: '暂无可导出的数据',
|
||||
icon: 'none'
|
||||
});
|
||||
return;
|
||||
}
|
||||
|
||||
const query = wx.createSelectorQuery().in(this);
|
||||
query.select('#sankeyCanvas').boundingClientRect();
|
||||
query.exec((res) => {
|
||||
const rect = res && res[0];
|
||||
if (!rect || !rect.width || !rect.height) {
|
||||
wx.showToast({
|
||||
title: '导出 SVG 失败：画布尺寸无效',
|
||||
icon: 'none'
|
||||
});
|
||||
return;
|
||||
}
|
||||
|
||||
const svgText = buildSankeySvgText(links, rect.width, rect.height, {
|
||||
nodeGap: this.data.nodeGap,
|
||||
chartPadding: this.data.chartPadding,
|
||||
labelPositionMode: this.data.labelPositionMode,
|
||||
targetAlignMode: this.data.targetAlignMode
|
||||
});
|
||||
if (!svgText) {
|
||||
wx.showToast({
|
||||
title: '暂无可导出的数据',
|
||||
icon: 'none'
|
||||
});
|
||||
return;
|
||||
}
|
||||
|
||||
const svgFilePath = `${wx.env.USER_DATA_PATH}/sankey_${formatFileTimestamp()}.svg`;
|
||||
wx.getFileSystemManager().writeFile({
|
||||
filePath: svgFilePath,
|
||||
data: svgText,
|
||||
encoding: 'utf8',
|
||||
success() {
|
||||
wx.openDocument({
|
||||
filePath: svgFilePath,
|
||||
showMenu: true,
|
||||
success() {
|
||||
wx.showToast({
|
||||
title: 'SVG 已导出',
|
||||
icon: 'success'
|
||||
});
|
||||
},
|
||||
fail() {
|
||||
wx.setClipboardData({
|
||||
data: svgFilePath,
|
||||
success() {
|
||||
wx.showToast({
|
||||
title: 'SVG 已导出，路径已复制',
|
||||
icon: 'none'
|
||||
});
|
||||
},
|
||||
fail() {
|
||||
wx.showToast({
|
||||
title: 'SVG 已导出',
|
||||
icon: 'success'
|
||||
});
|
||||
}
|
||||
});
|
||||
}
|
||||
});
|
||||
},
|
||||
fail(err) {
|
||||
wx.showToast({
|
||||
title: `导出 SVG 失败: ${err && err.errMsg ? err.errMsg : '未知错误'}`,
|
||||
icon: 'none'
|
||||
});
|
||||
}
|
||||
});
|
||||
});
|
||||
}
|
||||
});
|
||||
|
||||
Reference in New Issue
Block a user