From 888fba907eba13ee6a30bf7169d4d96af5b443a5 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 27 Sep 2020 11:02:06 +0200
Subject: Implement pgup/pgdown/home/end keys

---
 src/Body.cpp | 38 +++++++++++++++++++++++++++++++++++---
 1 file changed, 35 insertions(+), 3 deletions(-)

(limited to 'src/Body.cpp')

diff --git a/src/Body.cpp b/src/Body.cpp
index 477591e..c52f8ad 100644
--- a/src/Body.cpp
+++ b/src/Body.cpp
@@ -74,7 +74,8 @@ namespace QuickMedia {
         selected_item(0),
         prev_selected_item(0),
         page_scroll(0.0f),
-        item_background(sf::Vector2f(1.0f, 1.0f), 10.0f, 10)
+        item_background(sf::Vector2f(1.0f, 1.0f), 10.0f, 10),
+        num_visible_items(0)
     {
         progress_text.setFillColor(sf::Color::White);
         replies_text.setFillColor(sf::Color(129, 162, 190));
@@ -91,6 +92,26 @@ namespace QuickMedia {
             load_thumbnail_future.get();
     }
 
+    // TODO: Make this work with wraparound enabled?
+    // TODO: For plugins with different sized body items this can be weird, because after scrolling down thumbnails could load and they could move items up/down until we see items we haven't seen
+    bool Body::select_previous_page() {
+        for(int i = 0; i < num_visible_items - 1; ++i) {
+            if(!select_previous_item())
+                return false;
+        }
+        return true;
+    }
+
+    // TODO: Make this work with wraparound enabled?
+    // TODO: For plugins with different sized body items this can be weird, because after scrolling down thumbnails could load and they could move items up/down until we see items we haven't seen
+    bool Body::select_next_page() {
+        for(int i = 0; i < num_visible_items - 1; ++i) {
+            if(!select_next_item())
+                return false;
+        }
+        return true;
+    }
+
     bool Body::select_previous_item() {
         if(items.empty())
             return false;
@@ -161,6 +182,13 @@ namespace QuickMedia {
         clamp_selection();
     }
 
+    void Body::select_last_item() {
+        selected_item = std::max(0, (int)items.size() - 1);
+        //prev_selected_item = selected_item;
+        //page_scroll = 0.0f;
+        clamp_selection();
+    }
+
     void Body::reset_selected() {
         for(size_t i = 0; i < items.size(); ++i) {
             if(items[i]->visible) {
@@ -229,8 +257,9 @@ namespace QuickMedia {
         }
 
         reset_scroll:
-        prev_selected_item = selected_item;
-        page_scroll = 0.0f;
+        {}
+        //prev_selected_item = selected_item;
+        //page_scroll = 0.0f;
     }
 
     static sf::Vector2f to_vec2f(const sf::Vector2u &vec) {
@@ -364,6 +393,7 @@ namespace QuickMedia {
         //item_background.setOutlineColor(sf::Color(13, 15, 17));
         image_fallback.setSize(thumbnail_fallback_size);
         item_background_shadow.setFillColor(line_seperator_color);
+        num_visible_items = 0;
 
         if(loading_thumbnail && load_thumbnail_future.valid() && load_thumbnail_future.wait_for(std::chrono::seconds(0)) == std::future_status::ready) {
             load_thumbnail_future.get();
@@ -476,6 +506,7 @@ namespace QuickMedia {
                 break;
 
             draw_item(window, item.get(), prev_pos, size, item_height, i, content_progress);
+            ++num_visible_items;
         }
 
         sf::Vector2f after_pos = pos;
@@ -492,6 +523,7 @@ namespace QuickMedia {
             float item_height = get_item_height(item.get());
             draw_item(window, item.get(), after_pos, size, item_height, i, content_progress);
             after_pos.y += item_height + spacing_y;
+            ++num_visible_items;
         }
 
         glDisable(GL_SCISSOR_TEST);
-- 
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