From 70b82b7b597d0574466a668c2b801168ab0fcae0 Mon Sep 17 00:00:00 2001
From: miruka <miruka@disroot.org>
Date: Fri, 30 Aug 2019 13:40:56 -0400
Subject: [PATCH] Add scroll to top/bottom keybinds

---
 src/python/config_files.py |  4 ++++
 src/qml/Shortcuts.qml      | 12 ++++++++++++
 src/qml/utils.js           | 26 ++++++++++++++++++++++----
 3 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/src/python/config_files.py b/src/python/config_files.py
index bbe82f54..7be9f277 100644
--- a/src/python/config_files.py
+++ b/src/python/config_files.py
@@ -115,6 +115,10 @@ class UISettings(JSONConfigFile):
                 "scrollDown":     ["Alt+Down", "Alt+J"],
                 "scrollPageUp":   ["Alt+Ctrl+Up", "Alt+Ctrl+K", "PageUp"],
                 "scrollPageDown": ["Alt+Ctrl+Down", "Alt+Ctrl+J", "PageDown"],
+                "scrollToTop":
+                    ["Alt+Ctrl+Shift+Up", "Alt+Ctrl+Shift+K", "Home"],
+                "scrollToBottom":
+                    ["Alt+Ctrl+Shift+Down", "Alt+Ctrl+Shift+J", "End"],
 
                 "focusSidePane":    ["Alt+S", "Ctrl+S"],
                 "clearRoomFilter":  ["Alt+Shift+S", "Ctrl+Shift+S"],
diff --git a/src/qml/Shortcuts.qml b/src/qml/Shortcuts.qml
index 08e6cc7d..d39fab79 100644
--- a/src/qml/Shortcuts.qml
+++ b/src/qml/Shortcuts.qml
@@ -48,6 +48,18 @@ HShortcutHandler {
         onHeld: pressed(event)
     }
 
+    HShortcut {
+        sequences: settings.keys.scrollToTop
+        onPressed: Utils.flickToTop(flickTarget)
+        onHeld: pressed(event)
+    }
+
+    HShortcut {
+        sequences: settings.keys.scrollToBottom
+        onPressed: Utils.flickToBottom(flickTarget)
+        onHeld: pressed(event)
+    }
+
 
     // SidePane
 
diff --git a/src/qml/utils.js b/src/qml/utils.js
index 897c2235..27afddfd 100644
--- a/src/qml/utils.js
+++ b/src/qml/utils.js
@@ -169,13 +169,31 @@ function getItem(array, mainKey, value) {
 }
 
 
-function smartVerticalFlick(flickTarget, baseVelocity, fastMultiply=3) {
-    if (! flickTarget.interactive) { return }
+function smartVerticalFlick(flickable, baseVelocity, fastMultiply=3) {
+    if (! flickable.interactive) { return }
 
     baseVelocity = -baseVelocity
-    let vel      = -flickTarget.verticalVelocity
+    let vel      = -flickable.verticalVelocity
     let fast     = (baseVelocity < 0 && vel < baseVelocity / 2) ||
                    (baseVelocity > 0 && vel > baseVelocity / 2)
 
-    flickTarget.flick(0, baseVelocity * (fast ? fastMultiply : 1))
+    flickable.flick(0, baseVelocity * (fast ? fastMultiply : 1))
+}
+
+function flickToTop(flickable) {
+    if (! flickable.interactive) return
+    if (flickable.visibleArea.yPosition < 0) return
+
+    flickable.contentY -= flickable.contentHeight
+    flickable.returnToBounds()
+    flickable.flick(0, -100)  // Force the delegates to load
+}
+
+function flickToBottom(flickable) {
+    if (! flickable.interactive) return
+    if (flickable.visibleArea.yPosition < 0) return
+
+    flickable.contentY = flickTarget.contentHeight - flickTarget.height
+    flickable.returnToBounds()
+    flickable.flick(0, 100)
 }