Links are clickable

browser/main/global.styl

@@ -132,6 +132,15 @@ body[data-theme="dark"]
 .CodeMirror-foldgutter-folded:after
   content: "\25B8"
 
+.CodeMirror-hover
+  padding 2px 4px 0 4px
+  position absolute
+  z-index 99
+
+.CodeMirror-hyperlink
+  cursor pointer
+
+
 .sortableItemHelper
   z-index modalZIndex + 5
 

extra_scripts/codemirror/addon/hyperlink/hyperlink.js

@@ -0,0 +1,127 @@
+(function (mod) {
+  if (typeof exports === 'object' && typeof module === 'object') { // Common JS
+    mod(require('../codemirror/lib/codemirror'))
+  } else if (typeof define === 'function' && define.amd) { // AMD
+    define(['../codemirror/lib/codemirror'], mod)
+  } else { // Plain browser env
+    mod(CodeMirror)
+  }
+})(function (CodeMirror) {
+  'use strict'
+
+  const shell = require('electron').shell
+  const yOffset = 2
+
+  const macOS = global.process.platform === 'darwin'
+  const modifier = macOS ? 'metaKey' : 'ctrlKey'
+
+  class HyperLink {
+    constructor(cm) {
+      this.cm = cm
+      this.lineDiv = cm.display.lineDiv
+
+      this.onMouseDown = this.onMouseDown.bind(this)
+      this.onMouseEnter = this.onMouseEnter.bind(this)
+      this.onMouseLeave = this.onMouseLeave.bind(this)
+      this.onMouseMove = this.onMouseMove.bind(this)
+
+      this.tooltip = document.createElement('div')
+      this.tooltipContent = document.createElement('div')
+      this.tooltipIndicator = document.createElement('div')
+      this.tooltip.setAttribute('class', 'CodeMirror-hover CodeMirror-matchingbracket CodeMirror-selected')
+      this.tooltip.setAttribute('cm-ignore-events', 'true')
+      this.tooltip.appendChild(this.tooltipContent)
+      this.tooltip.appendChild(this.tooltipIndicator)
+      this.tooltipContent.textContent = `${macOS ? 'Cmd(⌘)' : 'Ctrl(^)'} + click to follow link`
+
+      this.lineDiv.addEventListener('mousedown', this.onMouseDown)
+      this.lineDiv.addEventListener('mouseenter', this.onMouseEnter, {
+        capture: true,
+        passive: true
+      })
+      this.lineDiv.addEventListener('mouseleave', this.onMouseLeave, {
+        capture: true,
+        passive: true
+      })
+      this.lineDiv.addEventListener('mousemove', this.onMouseMove, {
+        passive: true
+      })
+    }
+    getUrl(el) {
+      const className = el.className.split(' ')
+
+      if (className.indexOf('cm-url') !== -1) {
+        const match = /^\((.*)\)|\[(.*)\]|(.*)$/.exec(el.textContent)
+        return match[1] || match[2] || match[3]
+      }
+
+      return null
+    }
+    onMouseDown(e) {
+      const { target } = e
+      if (!e[modifier]) {
+        return
+      }
+
+      const url = this.getUrl(target)
+      if (url) {
+        e.preventDefault()
+
+        shell.openExternal(url)
+      }
+    }
+    onMouseEnter(e) {
+      const { target } = e
+
+      const url = this.getUrl(target)
+      if (url) {
+        if (e[modifier]) {
+          target.classList.add('CodeMirror-activeline-background', 'CodeMirror-hyperlink')
+        }
+        else {
+          target.classList.add('CodeMirror-activeline-background')
+        }
+
+        this.showInfo(target)
+      }
+    }
+    onMouseLeave(e) {
+      if (this.tooltip.parentElement === this.lineDiv) {
+        e.target.classList.remove('CodeMirror-activeline-background', 'CodeMirror-hyperlink')
+
+        this.lineDiv.removeChild(this.tooltip)
+      }
+    }
+    onMouseMove(e) {
+      if (this.tooltip.parentElement === this.lineDiv) {
+        if (e[modifier]) {
+          e.target.classList.add('CodeMirror-hyperlink')
+        }
+        else {
+          e.target.classList.remove('CodeMirror-hyperlink')
+        }
+      }
+    }
+    showInfo(relatedTo) {
+      const b1 = relatedTo.getBoundingClientRect()
+      const b2 = this.lineDiv.getBoundingClientRect()
+      const tdiv = this.tooltip
+
+      tdiv.style.left = (b1.left - b2.left) + 'px'
+      this.lineDiv.appendChild(tdiv)
+
+      const b3 = tdiv.getBoundingClientRect()
+      const top = b1.top - b2.top - b3.height - yOffset
+      if (top < 0) {
+        tdiv.style.top = (b1.top - b2.top + b1.height + yOffset) + 'px'
+      }
+      else {
+        tdiv.style.top = top + 'px'
+      }
+    }
+  }
+
+  CodeMirror.defineOption('hyperlink', true, (cm) => {
+    const addon = new HyperLink(cm)
+  })
+})

lib/main.html

@@ -10,6 +10,7 @@
   <link rel="stylesheet" href="../node_modules/codemirror/lib/codemirror.css">
   <link rel="stylesheet" href="../node_modules/katex/dist/katex.min.css">
   <link rel="stylesheet" href="../node_modules/codemirror/addon/dialog/dialog.css">
+
   <title>Boostnote</title>
 
   <style>
@@ -95,6 +96,7 @@
   <script src="../node_modules/codemirror/addon/runmode/runmode.js"></script>
 
   <script src="../extra_scripts/boost/boostNewLineIndentContinueMarkdownList.js"></script>
+  <script src="../extra_scripts/codemirror/addon/hyperlink/hyperlink.js"></script>
 
   <script src="../node_modules/codemirror/addon/edit/closebrackets.js"></script>
   <script src="../node_modules/codemirror/addon/edit/matchbrackets.js"></script>