add basic inputrules and pasterules

packages/core/src/pasteRules/markPasteRule.ts

@@ -0,0 +1,60 @@
+import { Plugin } from 'prosemirror-state'
+import { Slice, Fragment, MarkType } from 'prosemirror-model'
+
+export default function (regexp: RegExp, type: MarkType, getAttrs?: Function) {
+
+  const handler = (fragment: Fragment, parent?: any) => {
+    const nodes: any[] = []
+    
+    fragment.forEach(child => {
+      if (child.isText && child.text) {
+        const { text } = child
+        let pos = 0
+        let match
+        
+        // eslint-disable-next-line
+        while ((match = regexp.exec(text)) !== null) {
+          if (parent.type.allowsMarkType(type) && match[1]) {
+            const start = match.index
+            const end = start + match[0].length
+            const textStart = start + match[0].indexOf(match[1])
+            const textEnd = textStart + match[1].length
+            const attrs = getAttrs instanceof Function ? getAttrs(match) : getAttrs
+
+            // adding text before markdown to nodes
+            if (start > 0) {
+              nodes.push(child.cut(pos, start))
+            }
+
+            // adding the markdown part to nodes
+            nodes.push(child
+              .cut(textStart, textEnd)
+              // @ts-ignore
+              .mark(type.create(attrs).addToSet(child.marks)))
+
+            pos = end
+          }
+        }
+
+        // adding rest of text to nodes
+        if (pos < text.length) {
+          nodes.push(child.cut(pos))
+        }
+      } else {
+        nodes.push(child.copy(handler(child.content, child)))
+      }
+    })
+
+    return Fragment.fromArray(nodes)
+  }
+
+  return new Plugin({
+    props: {
+      transformPasted: slice => {
+        console.log({slice})
+        return new Slice(handler(slice.content), slice.openStart, slice.openEnd)
+      },
+    },
+  })
+
+}