FEATURE: CTRL-SHIFT-ENTER and SHIFT-Click do not scroll on post (#10965)

This allows for an advanced feature where hitting control on click or
CTRL-SHIFT-ENTER will lead to a post being made but the browser not to
scroll to the end.

app/assets/javascripts/discourse/app/components/d-button.js

@@ -17,6 +17,7 @@ export default Component.extend({
   translatedLabel: null,
   ariaLabel: null,
   translatedAriaLabel: null,
+  forwardEvent: false,
 
   isLoading: computed({
     set(key, value) {
@@ -89,7 +90,7 @@ export default Component.extend({
     return computedLabel;
   },
 
-  click() {
+  click(event) {
     let { action } = this;
 
     if (action) {
@@ -98,9 +99,17 @@ export default Component.extend({
         // There is already a warning in the console.
         this.sendAction("action", this.actionParam);
       } else if (typeof action === "object" && action.value) {
-        action.value(this.actionParam);
+        if (this.forwardEvent) {
+          action.value(this.actionParam, event);
+        } else {
+          action.value(this.actionParam);
+        }
       } else if (typeof this.action === "function") {
-        action(this.actionParam);
+        if (this.forwardEvent) {
+          action(this.actionParam, event);
+        } else {
+          action(this.actionParam);
+        }
       }
     }
 

app/assets/javascripts/discourse/app/controllers/composer.js

@@ -547,8 +547,8 @@ export default Controller.extend({
       this.cancelComposer(differentDraftContext);
     },
 
-    save() {
-      this.save();
+    save(ignore, event) {
+      this.save(false, { jump: !(event && event.shiftKey) });
     },
 
     displayEditReason() {
@@ -626,7 +626,7 @@ export default Controller.extend({
 
   disableSubmit: or("model.loading", "isUploading"),
 
-  save(force) {
+  save(force, options = {}) {
     if (this.disableSubmit) {
       return;
     }
@@ -775,7 +775,8 @@ export default Controller.extend({
         this.currentUser.set("any_posts", true);
 
         const post = result.target;
-        if (post && !staged) {
+
+        if (post && !staged && options.jump !== false) {
           DiscourseURL.routeTo(post.url, { skipIfOnScreen: true });
         }
       })

app/assets/javascripts/discourse/app/mixins/key-enter-escape.js

@@ -14,7 +14,7 @@ export default {
       //
       // iPad physical keyboard does not offer Command or Control detection
       // so use ALT-ENTER
-      this.save();
+      this.save(undefined, e);
       return false;
     }
   },

app/assets/javascripts/discourse/app/templates/composer.hbs

@@ -135,6 +135,7 @@
               {{composer-save-button action=(action "save")
                                      icon=saveIcon
                                      label=saveLabel
+                                     forwardEvent=true
                                      disableSubmit=disableSubmit}}
 
               {{#if site.mobileView}}