08-27-周三_17-09-29

node_modules/dagre-d3-renderer/lib/label/add-html-label.js

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+import util from '../util'
+
+function addHtmlLabel (root, node) {
+  const fo = root
+    .append('foreignObject')
+      .attr('width', '100000')
+
+  const div = fo
+    .append('xhtml:div')
+  div.attr('xmlns', 'http://www.w3.org/1999/xhtml')
+
+  const label = node.label
+  switch (typeof label) {
+    case 'function':
+      div.insert(label)
+      break
+    case 'object':
+      // Currently we assume this is a DOM object.
+      div.insert(function () { return label })
+      break
+    default: div.html(label)
+  }
+
+  util.applyStyle(div, node.labelStyle)
+  div.style('display', 'inline-block')
+  // Fix for firefox
+  div.style('white-space', 'nowrap')
+
+  const client = div[0][0].getBoundingClientRect()
+  fo
+    .attr('width', client.width)
+    .attr('height', client.height)
+
+  return fo
+}
+
+export default addHtmlLabel

node_modules/dagre-d3-renderer/lib/label/add-label.js

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+import addTextLabel from './add-text-label'
+import addHtmlLabel from './add-html-label'
+import addSVGLabel from './add-svg-label'
+
+function addLabel (root, node, location) {
+  const label = node.label
+  const labelSvg = root.append('g')
+
+  // Allow the label to be a string, a function that returns a DOM element, or
+  // a DOM element itself.
+  if (node.labelType === 'svg') {
+    addSVGLabel(labelSvg, node)
+  } else if (typeof label !== 'string' || node.labelType === 'html') {
+    addHtmlLabel(labelSvg, node)
+  } else {
+    addTextLabel(labelSvg, node)
+  }
+
+  const labelBBox = labelSvg.node().getBBox()
+  let y
+  switch (location) {
+    case 'top':
+      y = (-node.height / 2)
+      break
+    case 'bottom':
+      y = (node.height / 2) - labelBBox.height
+      break
+    default:
+      y = (-labelBBox.height / 2)
+  }
+  labelSvg.attr('transform',
+                'translate(' + (-labelBBox.width / 2) + ',' + y + ')')
+
+  return labelSvg
+}
+
+export default addLabel

node_modules/dagre-d3-renderer/lib/label/add-svg-label.js

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+import util from '../util'
+
+function addSVGLabel (root, node) {
+  const domNode = root
+
+  domNode.node().appendChild(node.label)
+
+  util.applyStyle(domNode, node.labelStyle)
+
+  return domNode
+}
+
+export default addSVGLabel

node_modules/dagre-d3-renderer/lib/label/add-text-label.js

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+import util from '../util'
+
+/*
+ * Attaches a text label to the specified root. Handles escape sequences.
+ */
+function addTextLabel (root, node) {
+  const domNode = root.append('text')
+
+  const lines = processEscapeSequences(node.label).split('\n')
+  for (let i = 0; i < lines.length; i += 1) {
+    domNode
+      .append('tspan')
+        .attr('xml:space', 'preserve')
+        .attr('dy', '1em')
+        .attr('x', '1')
+        .text(lines[i])
+  }
+
+  util.applyStyle(domNode, node.labelStyle)
+
+  return domNode
+}
+
+function processEscapeSequences (text) {
+  let newText = ''
+  let escaped = false
+  let ch = null
+  for (let i = 0; i < text.length; i += 1) {
+    ch = text[i]
+    if (escaped) {
+      switch (ch) {
+        case 'n': newText += '\n'; break
+        default: newText += ch
+      }
+      escaped = false
+    } else if (ch === '\\') {
+      escaped = true
+    } else {
+      newText += ch
+    }
+  }
+  return newText
+}
+
+export default addTextLabel