src/components/post_status_form/post_status_form.js

@@ -199,6 +199,10 @@ const PostStatusForm = {
       }
     }
 
+    // When first loading the form, hide the subject (CW) field if it's disabled or doesn't have a starting value.
+    // "disableSubject" seems to take priority over "alwaysShowSubject"
+    const showSubject = !this.disableSubject && (statusParams.spoilerText || this.alwaysShowSubject)
+
     return {
       dropFiles: [],
       uploadingFiles: false,
@@ -215,7 +219,8 @@ const PostStatusForm = {
       emojiInputShown: false,
       idempotencyKey: '',
       activeEmojiInput: undefined,
-      activeTextInput: undefined
+      activeTextInput: undefined,
+      subjectVisible: showSubject
     }
   },
   computed: {
@@ -690,6 +695,20 @@ const PostStatusForm = {
       this.activeEmojiInput = 'subject-emoji-input'
       this.activeTextInput = 'subject-input'
     },
+    toggleSubjectVisible() {
+      // If hiding CW, then we need to clear the subject and reset focus
+      if (this.subjectVisible)
+      {
+        this.focusStatusInput()
+
+        // "nsfw" property is normally set by the @change listener, but this bypasses it.
+        // We need to clear it manually instead.
+        this.newStatus.spoilerText = ''
+        this.newStatus.nsfw = false
+      }
+
+      this.subjectVisible = !this.subjectVisible
+    },
     clearError () {
       this.error = null
     },

src/components/post_status_form/post_status_form.vue

@@ -119,7 +119,7 @@
         </div>
         <EmojiInput
           ref="subject-emoji-input"
-          v-if="!disableSubject && (newStatus.spoilerText || alwaysShowSubject)"
+          v-if="subjectVisible"
           v-model="newStatus.spoilerText"
           enable-emoji-picker
           hide-emoji-button
@@ -281,6 +281,15 @@
           >
             <FAIcon icon="poll-h" />
           </button>
+          <button
+            v-if="!disableSubject"
+            class="spoiler-icon button-unstyled"
+            :class="{ selected: subjectVisible }"
+            :title="$t('post_status.toggle_content_warning')"
+            @click="toggleSubjectVisible"
+          >
+            <FAIcon icon="eye-slash" />
+          </button>
         </div>
         <button
           v-if="posting"
@@ -461,7 +470,7 @@
     }
   }
 
-  .media-upload-icon, .poll-icon, .emoji-icon {
+  .media-upload-icon, .poll-icon, .emoji-icon, .spoiler-icon {
     font-size: 1.85em;
     line-height: 1.1;
     flex: 1;
@@ -504,6 +513,11 @@
 
   .poll-icon {
     order: 3;
+    justify-content: center;
+  }
+
+  .spoiler-icon {
+    order: 4;
     justify-content: right;
   }
 

src/i18n/en.json

@@ -380,6 +380,7 @@
             "text/x.misskeymarkdown": "MFM"
         },
         "content_warning": "Content Warning (optional)",
+        "toggle_content_warning": "Toggle content warning",
         "default": "Just arrived at Luna Nova Academy",
         "direct_warning_to_all": "This post will be visible to all the mentioned users.",
         "direct_warning_to_first_only": "This post will only be visible to the mentioned users at the beginning of the message.",