Add youtube thumbnails, dont draw rows outside window

2 files changed, 38 insertions, 4 deletions

diff --git a/src/Body.cpp b/src/Body.cpp
index 52f3105..c9fbc89 100644
--- a/src/Body.cpp
+++ b/src/Body.cpp
@@ -110,12 +110,11 @@ namespace QuickMedia {
         draw(window, pos, size, empty_object);
     }
 
-    // TODO: Skip drawing the rows that are outside the window.
     // TODO: Use a render target for the whole body so all images can be put into one.
-    // TODO: Only load images once they are visible on the screen.
+    // TODO: Unload thumbnails once they are no longer visible on the screen.
     // TODO: Load thumbnails with more than one thread.
     // TODO: Show chapters (rows) that have been read differently to make it easier to see what
-    // needs hasn't been read yet.
+    // hasn't been read yet.
     void Body::draw(sf::RenderWindow &window, sf::Vector2f pos, sf::Vector2f size, const Json::Value &content_progress) {
         const float font_height = title_text.getCharacterSize() + 8.0f;
         const float image_height = 100.0f;
@@ -159,10 +158,15 @@ namespace QuickMedia {
                 ++visible_rows;
         }
 
+        auto window_size = window.getSize();
+
         for(int i = first_visible_item + 1; i < num_items; ++i) {
             const auto &item = items[i];
-            assert(items.size() == item_thumbnail_textures.size());
             auto &item_thumbnail = item_thumbnail_textures[i];
+
+            if(pos.y >= window_size.y)
+                return;
+
             if(!item->visible)
                 continue;
 
diff --git a/src/plugins/Youtube.cpp b/src/plugins/Youtube.cpp
index 67a47e4..40d545c 100644
--- a/src/plugins/Youtube.cpp
+++ b/src/plugins/Youtube.cpp
@@ -8,6 +8,10 @@ namespace QuickMedia {
         return strncmp(str, begin_with, strlen(begin_with)) == 0;
     }
 
+    static bool contains(const char *str, const char *substr) {
+        return strstr(str, substr);
+    }
+
     SearchResult Youtube::search(const std::string &text, std::vector<std::unique_ptr<BodyItem>> &result_items, Page &next_page) {
         next_page = Page::SEARCH_RESULT;
         std::string url = "https://youtube.com/results?search_query=";
@@ -17,6 +21,12 @@ namespace QuickMedia {
         if(download_to_string(url, website_data) != DownloadResult::OK)
             return SearchResult::NET_ERR;
 
+        struct ItemData {
+            std::vector<std::unique_ptr<BodyItem>> *result_items;
+            size_t index;
+        };
+        ItemData item_data = { &result_items, 0 };
+
         QuickMediaHtmlSearch html_search;
         int result = quickmedia_html_search_init(&html_search, website_data.c_str());
         if(result != 0)
@@ -34,6 +44,26 @@ namespace QuickMedia {
                     result_items->push_back(std::move(item));
                 }
             }, &result_items);
+        if(result != 0)
+            goto cleanup;
+
+        result = quickmedia_html_find_nodes_xpath(&html_search, "//span[class=\"yt-thumb-simple\"]//img",
+            [](QuickMediaHtmlNode *node, void *userdata) {
+                ItemData *item_data = (ItemData*)userdata;
+                if(item_data->index >= item_data->result_items->size())
+                    return;
+
+                const char *src = quickmedia_html_node_get_attribute_value(node, "src");
+                const char *data_thumb = quickmedia_html_node_get_attribute_value(node, "data-thumb");
+
+                if(src && contains(src, "i.ytimg.com/")) {
+                    (*item_data->result_items)[item_data->index]->thumbnail_url = src;
+                    ++item_data->index;
+                } else if(data_thumb && contains(data_thumb, "i.ytimg.com/")) {
+                    (*item_data->result_items)[item_data->index]->thumbnail_url = data_thumb;
+                    ++item_data->index;
+                }
+            }, &item_data);
 
         cleanup:
         quickmedia_html_search_deinit(&html_search);