From a0f04064542187cebaf46c69ed2eb35458412f7b Mon Sep 17 00:00:00 2001
From: mauro <mauro.cappelli@celi.it>
Date: Tue, 4 May 2021 10:14:24 +0200
Subject: [PATCH] esperimenti sugli eventi delle annotazioni

---
 .../tasks/sequenceLabeling/EntityItem.vue     |  95 ++++++---
 .../tasks/sequenceLabeling/EntityItemBox.vue  | 195 ++++++++++++++----
 .../projects/_id/sequence-labeling/index.vue  |  13 +-
 3 files changed, 234 insertions(+), 69 deletions(-)

diff --git a/frontend/components/tasks/sequenceLabeling/EntityItem.vue b/frontend/components/tasks/sequenceLabeling/EntityItem.vue
index 393b7805..df3fcc83 100644
--- a/frontend/components/tasks/sequenceLabeling/EntityItem.vue
+++ b/frontend/components/tasks/sequenceLabeling/EntityItem.vue
@@ -1,32 +1,36 @@
 <template>
   <v-menu
-    v-if="label"
-    v-model="showMenu"
-    offset-y
+      v-if="label"
+      v-model="showMenu"
+      offset-y
   >
     <template v-slot:activator="{ on }">
-      <span :style="{ borderColor: color }" class="highlight bottom" v-on="on">
-        <span class="highlight__content">{{ content }}<v-icon class="delete" @click.stop="remove">mdi-close-circle</v-icon></span><span :data-label="label" :style="{ backgroundColor: color, color: textColor }" class="highlight__label" />
+      <span :id="'spn-' + spanid" :style="{ borderColor: color }" class="highlight bottom" v-on="on">
+        <span class="highlight__content">{{ content }}<v-icon class="delete" @click.stop="remove">mdi-close-circle</v-icon><span
+            :class="{ active: spanid === selectedChunkId }" class="iconify target-selector" data-icon="mdi-link-variant"
+            @click.stop="onLinkClick"></span></span><span :data-label="label" :style="{ backgroundColor: color, color: textColor }"
+                                                          class="highlight__label"/>
       </span>
     </template>
+
     <v-list
-      dense
-      min-width="150"
-      max-height="400"
-      class="overflow-y-auto"
+        dense
+        min-width="150"
+        max-height="400"
+        class="overflow-y-auto"
     >
       <v-list-item
-        v-for="(item, i) in labels"
-        :key="i"
-        v-shortkey.once="[item.suffixKey]"
-        @shortkey="update(item)"
-        @click="update(item)"
+          v-for="(item, i) in labels"
+          :key="i"
+          v-shortkey.once="[item.suffixKey]"
+          @shortkey="update(item)"
+          @click="update(item)"
       >
         <v-list-item-content>
-          <v-list-item-title v-text="item.text" />
+          <v-list-item-title v-text="item.text"/>
         </v-list-item-content>
         <v-list-item-action>
-          <v-list-item-action-text v-text="item.suffixKey" />
+          <v-list-item-action-text v-text="item.suffixKey"/>
         </v-list-item-action>
       </v-list-item>
     </v-list>
@@ -35,10 +39,15 @@
 </template>
 
 <script>
-import { idealColor } from '~/plugins/utils.js'
+import {idealColor} from '~/plugins/utils.js'
 
 export default {
   props: {
+    spanid: {
+      type: Number,
+      default: 0,
+      required: true
+    },
     content: {
       type: String,
       default: '',
@@ -59,6 +68,10 @@ export default {
     },
     newline: {
       type: Boolean
+    },
+    selectedChunkId: {
+      type: Number,
+      default: -1
     }
   },
   data() {
@@ -78,6 +91,10 @@ export default {
     },
     remove() {
       this.$emit('remove')
+    },
+    onLinkClick() {
+      this.$emit('selectLinkSource');
+      this.showMenu = false;
     }
   }
 }
@@ -87,46 +104,76 @@ export default {
 .highlight.blue {
   background: #edf4fa !important;
 }
+
 .highlight.bottom {
   display: block;
   white-space: normal;
 }
+
 .highlight:first-child {
   margin-left: 0;
 }
+
 .highlight {
   border: 2px solid;
   margin: 4px 6px 4px 3px;
   vertical-align: middle;
-  box-shadow: 2px 4px 20px rgba(0,0,0,.1);
+  box-shadow: 2px 4px 20px rgba(0, 0, 0, .1);
   position: relative;
   cursor: default;
   min-width: 26px;
   line-height: 22px;
   display: flex;
 }
+
 .highlight .delete {
-  top:-15px;
-  left:-13px;
-  position:absolute;
+  top: -15px;
+  left: -13px;
+  position: absolute;
   display: none;
 }
+
 .highlight:hover .delete {
   display: block;
 }
+
+.highlight .target-selector:before {
+  content: 'L';
+}
+
+.highlight .target-selector {
+  position: absolute;
+  top: -12px;
+  right: -11px;
+  width: 20px;
+  background: rgba(0, 0, 0, 0.54);
+  color: #ffffff;
+  border-radius: 30px;
+  cursor: pointer;
+  text-align: center;
+}
+
+.highlight .target-selector.active {
+  display: block;
+  background: #008ad6;
+  color: #ffffff;
+}
+
 .highlight__content {
   display: flex;
   flex-wrap: wrap;
   align-items: center;
-  padding: 2px 2px 0px 6px;
+  padding: 2px 2px 0 6px;
+  background: #ffffff;
 }
+
 .highlight.bottom .highlight__content:after {
   content: " ";
   padding-right: 3px;
 }
+
 .highlight__label {
   line-height: 14px;
-  padding-top: 1px;
   align-items: center;
   justify-content: center;
   display: flex;
@@ -138,6 +185,7 @@ export default {
   user-select: none;
   color: white;
 }
+
 .highlight__label::after {
   content: attr(data-label);
   display: block;
@@ -145,6 +193,7 @@ export default {
   -webkit-font-smoothing: subpixel-antialiased;
   letter-spacing: .1em;
 }
+
 .newline {
   width: 100%;
 }
diff --git a/frontend/components/tasks/sequenceLabeling/EntityItemBox.vue b/frontend/components/tasks/sequenceLabeling/EntityItemBox.vue
index 863b8c56..b67c8f37 100644
--- a/frontend/components/tasks/sequenceLabeling/EntityItemBox.vue
+++ b/frontend/components/tasks/sequenceLabeling/EntityItemBox.vue
@@ -1,50 +1,59 @@
 <template>
-  <div class="highlight-container highlight-container--bottom-labels" @click="open" @touchend="open">
-    <entity-item
-      v-for="(chunk, i) in chunks"
-      :key="i"
-      :content="chunk.text"
-      :newline="chunk.newline"
-      :label="chunk.label"
-      :color="chunk.color"
-      :labels="labels"
-      @remove="deleteAnnotation(chunk.id)"
-      @update="updateEntity($event.id, chunk.id)"
-    />
-    <v-menu
-      v-model="showMenu"
-      :position-x="x"
-      :position-y="y"
-      absolute
-      offset-y
-    >
-      <v-list
-        dense
-        min-width="150"
-        max-height="400"
-        class="overflow-y-auto"
-      >
-        <v-list-item
-          v-for="(label, i) in labels"
-          :key="i"
-          v-shortkey="[label.suffixKey]"
-          @shortkey="assignLabel(label.id)"
-          @click="assignLabel(label.id)"
-        >
-          <v-list-item-content>
-            <v-list-item-title v-text="label.text" />
-          </v-list-item-content>
-          <v-list-item-action>
-            <v-list-item-action-text v-text="label.suffixKey" />
-          </v-list-item-action>
-        </v-list-item>
-      </v-list>
-    </v-menu>
-  </div>
+<div id="connections-wrapper">
+   <div class="highlight-container highlight-container--bottom-labels" @click="open" @touchend="open">
+     <entity-item
+         v-for="(chunk, i) in chunks"
+         :key="i"
+         :spanid="chunk.id"
+         :content="chunk.text"
+         :newline="chunk.newline"
+         :label="chunk.label"
+         :color="chunk.color"
+         :labels="labels"
+         :selected-chunk-id="selectedChunkId"
+         @remove="deleteAnnotation(chunk.id)"
+         @update="updateEntity($event.id, chunk.id)"
+         @selectLinkSource="selectLinkSource(chunk)"
+     />
+     <v-menu
+         v-model="showMenu"
+         :position-x="x"
+         :position-y="y"
+         absolute
+         offset-y
+     >
+       <v-list
+           dense
+           min-width="150"
+           max-height="400"
+           class="overflow-y-auto"
+       >
+         <v-list-item
+             v-for="(label, i) in labels"
+             :key="i"
+             v-shortkey="[label.suffixKey]"
+             @shortkey="assignLabel(label.id)"
+             @click="assignLabel(label.id)"
+         >
+           <v-list-item-content>
+             <v-list-item-title v-text="label.text"/>
+           </v-list-item-content>
+           <v-list-item-action>
+             <v-list-item-action-text v-text="label.suffixKey"/>
+           </v-list-item-action>
+         </v-list-item>
+       </v-list>
+     </v-menu>
+   </div>
+
+   <canvas id="connections">
+   </canvas>
+</div>
 </template>
 
 <script>
 import EntityItem from './EntityItem'
+
 export default {
   components: {
     EntityItem
@@ -79,6 +88,16 @@ export default {
       type: Function,
       default: () => ([]),
       required: true
+    },
+    selectedChunkId: {
+      type: Number,
+      default: -1,
+      required: true
+    },
+    selectLinkSource: {
+      type: Function,
+      default: () => ([]),
+      required: true
     }
   },
   data() {
@@ -111,7 +130,8 @@ export default {
           id: entity.id,
           label: label.text,
           color: label.backgroundColor,
-          text: piece
+          text: piece,
+          selectedAsLinkSource: false
         })
       }
       // add the rest of text.
@@ -126,6 +146,71 @@ export default {
       return obj
     }
   },
+  updated() {
+    this.$nextTick(() => {
+      // SIMULATION ONLY
+
+      // svuota il canvas adeguandolo alla dimensione reale del <div> col testo
+      const parentPos = document.getElementById('connections-wrapper').getBoundingClientRect();
+      const canvas = document.getElementById('connections');
+      canvas.width = parentPos.width;
+      canvas.height = parentPos.height;
+      const ctx = canvas.getContext('2d');
+      ctx.clearRect(0, 0, parentPos.width, parentPos.height);
+
+      // simulo una relazione tra le prime due annotazioni
+      let one, two;
+
+      this.chunks.forEach(function(chunk) {
+        if (chunk.id) {
+          if (!one) {
+            one = chunk;
+          } else if (!two) {
+            two = chunk;
+          }
+        }
+      });
+
+      // disegno la pseudo relazione nel canvas
+      if (one && two) {
+        let childPos = document.getElementById('spn-' + one.id).getBoundingClientRect();
+        const x1 = (childPos.x + childPos.width / 2) - parentPos.x;
+        const y1 = (childPos.y + childPos.height / 2) - parentPos.y;
+
+        childPos = document.getElementById('spn-' + two.id).getBoundingClientRect();
+        const x2 = (childPos.x + childPos.width / 2) - parentPos.x;
+        const y2 = (childPos.y + childPos.height / 2) - parentPos.y;
+
+        ctx.lineWidth = 3;
+        ctx.moveTo(x1, y1);
+
+        if (y1 === y2) {
+          ctx.strokeStyle = one.color;
+          ctx.lineTo(x1, y1 + 25);
+          ctx.stroke();
+
+          const gradient = ctx.createLinearGradient(x1, y1 + 25, x2, y1 + 25);
+          gradient.addColorStop(0, one.color);
+          gradient.addColorStop(1, two.color);
+          ctx.strokeStyle = gradient;
+          ctx.lineTo(x2, y1 + 25);
+          ctx.stroke();
+
+          ctx.lineTo(x2, y2);
+          ctx.stroke();
+
+        } else {
+          const gradient = ctx.createLinearGradient(x1, y1, x2, y2);
+          gradient.addColorStop(0, one.color);
+          gradient.addColorStop(1, two.color);
+          ctx.strokeStyle = gradient;
+
+          ctx.lineTo(x2, y2);
+          ctx.stroke();
+        }
+      }
+    });
+  },
   methods: {
     makeChunks(text) {
       const chunks = []
@@ -152,6 +237,7 @@ export default {
       })
       return chunks
     },
+
     show(e) {
       e.preventDefault()
       this.showMenu = false
@@ -161,6 +247,7 @@ export default {
         this.showMenu = true
       })
     },
+
     setSpanInfo() {
       let selection
       // Modern browsers.
@@ -180,6 +267,7 @@ export default {
       this.start = [...preSelectionRange.toString()].length
       this.end = this.start + [...range.toString()].length
     },
+
     validateSpan() {
       if ((typeof this.start === 'undefined') || (typeof this.end === 'undefined')) {
         return false
@@ -200,12 +288,14 @@ export default {
       }
       return true
     },
+
     open(e) {
       this.setSpanInfo()
       if (this.validateSpan()) {
         this.show(e)
       }
     },
+
     assignLabel(labelId) {
       if (this.validateSpan()) {
         this.addEntity(this.start, this.end, labelId)
@@ -222,14 +312,31 @@ export default {
 .highlight-container.highlight-container--bottom-labels {
   align-items: flex-start;
 }
+
 .highlight-container {
-  line-height: 42px!important;
+  line-height: 50px !important;
   display: flex;
   flex-wrap: wrap;
   white-space: pre-wrap;
   cursor: default;
+  position: relative;
+  z-index: 1;
 }
+
 .highlight-container.highlight-container--bottom-labels .highlight.bottom {
   margin-top: 6px;
 }
+
+#connections-wrapper {
+  position: relative;
+}
+
+#connections-wrapper canvas {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  z-index: 0;
+}
 </style>
diff --git a/frontend/pages/projects/_id/sequence-labeling/index.vue b/frontend/pages/projects/_id/sequence-labeling/index.vue
index 4c73e59c..9ed2d39e 100644
--- a/frontend/pages/projects/_id/sequence-labeling/index.vue
+++ b/frontend/pages/projects/_id/sequence-labeling/index.vue
@@ -17,7 +17,7 @@
         class="d-flex d-sm-none"
       />
     </template>
-    <template v-slot:content>
+    <template v-slot:content  >
       <v-card>
         <v-card-text class="title">
           <entity-item-box
@@ -27,6 +27,8 @@
             :delete-annotation="remove"
             :update-entity="update"
             :add-entity="add"
+            :selected-chunk-id="selectedChunkId"
+            :select-link-source="selectLinkSource"
           />
         </v-card-text>
       </v-card>
@@ -77,7 +79,8 @@ export default {
       docs: [],
       labels: [],
       project: {},
-      enableAutoLabeling: false
+      enableAutoLabeling: false,
+      selectedChunkId: -1
     }
   },
 
@@ -148,6 +151,12 @@ export default {
       const approved = !this.doc.isApproved
       await this.$services.document.approve(this.projectId, this.doc.id, approved)
       await this.$fetch()
+    },
+
+    selectLinkSource(chunk) {
+      console.log(chunk.id);
+      console.log(this.selectedChunkId);
+      this.selectedChunkId = (this.selectedChunkId === chunk.id) ? -1 : chunk.id;
     }
   },