1 files changed, 3 insertions, 164 deletions
diff --git a/frontend/views/graph/components/graph.editor.js b/frontend/views/graph/components/graph.editor.js
index 87109bf..d11ecb1 100644
--- a/frontend/views/graph/components/graph.editor.js
+++ b/frontend/views/graph/components/graph.editor.js
@@ -11,6 +11,9 @@ import * as graphActions from '../graph.actions'
 import { Loader } from '../../../common'
 import { clamp, dist, mod, angle } from '../../../util'
 
+import GraphCanvas from './graph.canvas'
+import PageHandle from './page.handle'
+
 const defaultState = {
   dragging: false,
   bounds: null,
@@ -181,170 +184,6 @@ class GraphEditor extends Component {
   }
 }
 
-const DEFAULT_MEASUREMENT = { width: 16, height: 16 }
-const BACKLINK_SPACING = 10
-const ARROWHEAD_LENGTH = 10
-const GRAPH_LINK_COLOR = "#ff88ff"
-const GRAPH_BACKLINK_COLOR = "#88ffff"
-
-class GraphCanvas extends Component {
-  constructor(props) {
-    super(props)
-    this.canvasRef = React.createRef()
-  }
-  
-  componentDidMount() {
-    if (this.props.bounds) {
-      this.draw({})      
-    }
-  }
-  
-  componentDidUpdate(prevProps) {
-    this.draw(prevProps)
-  }
-
-  draw(prevProps) {
-    const { current: canvas } = this.canvasRef
-    const { bounds, pages, currentPage, box, measurements } = this.props
-    const { width, height } = bounds
-    if (prevProps.bounds !== bounds) {
-      canvas.width = width
-      canvas.height = height
-    }
-    const ctx = canvas.getContext('2d')
-    ctx.clearRect(0, 0, width, height)
-    ctx.lineWidth = 2
-    const coordsLookup = pages.reduce((a,b) => {
-      if (currentPage && box && b.id === currentPage.id) {
-        a[b.id] = {
-          x: box.x,
-          y: box.y,
-          backlinks: new Set([]),
-        }
-      } else {
-        a[b.id] = {
-          x: b.settings.x,
-          y: b.settings.y,
-          backlinks: new Set([]),
-        }
-      }
-      return a
-    }, {})
-    pages.map(page => {
-      const sourceCoord = coordsLookup[page.id]
-      page.backlinks.map(tile => {
-        if (tile.target_page_id <= 0) return
-        const targetCoord = coordsLookup[tile.page_id]
-        let tile_measurement = measurements[tile.page_id] || DEFAULT_MEASUREMENT
-        let target_measurement = measurements[tile.target_page_id] || DEFAULT_MEASUREMENT
-        let theta = angle(targetCoord.x, targetCoord.y, sourceCoord.x, sourceCoord.y)
-        let x1_offset = tile_measurement.width / 2 // * (0.5 - Math.cos(theta))
-        let y1_offset = tile_measurement.height / 2
-        let x2_offset = target_measurement.width / 2 // (0.5 - Math.cos(theta))
-        let y2_offset = target_measurement.height / 2
-        // skip duplicate links
-        if (sourceCoord.backlinks.has(tile.page_id)) {
-          return
-        }
-        // if this is the first time encountering this link...
-        if (!targetCoord.backlinks.has(tile.target_page_id)) {
-          sourceCoord.backlinks.add(tile.page_id)
-          ctx.strokeStyle = GRAPH_LINK_COLOR
-        } else { // otherwise this is a two-way link
-          x1_offset += BACKLINK_SPACING * Math.cos(theta + Math.PI /2)
-          y1_offset += BACKLINK_SPACING * Math.sin(theta + Math.PI /2)
-          x2_offset += BACKLINK_SPACING * Math.cos(theta + Math.PI /2)
-          y2_offset += BACKLINK_SPACING * Math.sin(theta + Math.PI /2)
-          ctx.strokeStyle = GRAPH_BACKLINK_COLOR
-        }
-        ctx.beginPath()
-        const x1 = targetCoord.x * width + x1_offset
-        const y1 = targetCoord.y * height + y1_offset
-        const x2 = sourceCoord.x * width + x2_offset
-        const y2 = sourceCoord.y * height + y2_offset
-        this.arrow(ctx, x1, y1, x2, y2)
-        ctx.stroke()
-      })
-    })
-  }
-  
-  arrow(ctx, x1, y1, x2, y2) {
-    const farOffset = 20
-    const endOffset = 1
-    const theta = angle(x1, y1, x2, y2)
-    x1 += Math.cos(theta) * 0
-    x2 -= Math.cos(theta) * farOffset
-    y1 += Math.sin(theta) * 0
-    y2 -= Math.sin(theta) * farOffset
-    const xEnd = x2 - Math.cos(theta) * endOffset
-    const yEnd = y2 - Math.sin(theta) * endOffset
-    const leftAngle = mod(theta - Math.PI / 6, Math.PI * 2)
-    const rightAngle = mod(theta + Math.PI / 6, Math.PI * 2)
-    ctx.moveTo(x1, y1)
-    ctx.lineTo(xEnd, yEnd)
-    ctx.moveTo(x2, y2)
-    ctx.lineTo(x2 - ARROWHEAD_LENGTH * Math.cos(leftAngle), y2 - ARROWHEAD_LENGTH * Math.sin(leftAngle))
-    ctx.moveTo(x2, y2)
-    ctx.lineTo(x2 - ARROWHEAD_LENGTH * Math.cos(rightAngle), y2 - ARROWHEAD_LENGTH * Math.sin(rightAngle))
-  }
-
-  render() {
-    return (
-      <canvas ref={this.canvasRef} />
-    )
-  }
-}
-
-class PageHandle extends Component {
-  constructor(props){
-    super(props)
-    this.ref = React.createRef()
-  }
-  componentDidMount(){
-    this.measure()
-  }
-  componentDidUpdate(prevProps){
-    if (this.props.page.title !== prevProps.page.title) {
-      this.measure()
-    }
-  }
-  measure() {
-    const { offsetWidth: width, offsetHeight: height } = this.ref.current
-    const { id } = this.props.page
-    console.log(id, width, height)
-    this.props.onMeasure({ id, width, height })
-  }
-  render() {
-    const { graph, page, bounds, box, onMouseDown } = this.props
-    let style;
-    if (box) {
-      style = {
-        top: (bounds.height) * box.y,
-        left: (bounds.width) * box.x,
-      }
-    } else {
-      style = {
-        top: (bounds.height) * Math.min(page.settings.y, 0.95),
-        left: (bounds.width) * Math.min(page.settings.x, 0.95),
-      }
-    }
-    const url = '/' + graph.path + '/' + page.path
-    // console.log(style)
-    return (
-      <div
-        className='handle'
-        ref={this.ref}
-        onMouseDown={onMouseDown}
-        onDoubleClick={() => history.push(url)}
-        style={style}
-      >
-        {page.title}
-        <Link to={url}>{'>'}</Link>
-      </div>
-    )
-  }
-}
-
 const mapStateToProps = state => ({
   graph: state.graph,
 })