votes: show votes when hovering over post score.

Make it so you can hover over a post's score to see the list of public
upvotes. Also show the upvote count, the downvote count, and the upvote
ratio.

app/components/post_votes_component/post_votes_component.html.erb

@@ -7,7 +7,9 @@
     <% end %>
   <% end %>
 
-  <span class="post-score"><%= post.score %></span>
+  <span class="post-score">
+    <%= link_to post.score, post_votes_path(search: { post_id: post.id }, variant: :compact) %>
+  </span>
 
   <% if can_vote? %>
     <% if downvoted? %>

app/components/post_votes_component/post_votes_component.scss

@@ -6,5 +6,11 @@
     text-align: center;
     min-width: 1.25em;
     white-space: nowrap;
+    vertical-align: middle;
+
+    a {
+      color: var(--text-color);
+      &:hover { text-decoration: underline; }
+    }
   }
 }

app/components/post_votes_tooltip_component.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+# This component represents the tooltip that displays when you hover over a post's score.
+class PostVotesTooltipComponent < ApplicationComponent
+  attr_reader :post, :current_user
+  delegate :upvote_icon, :downvote_icon, to: :helpers
+
+  def initialize(post:, current_user:)
+    super
+    @post = post
+    @current_user = current_user
+  end
+
+  def votes
+    @post.votes.includes(:user).order(id: :desc)
+  end
+
+  def vote_icon(vote)
+    vote.is_positive? ? upvote_icon : downvote_icon
+  end
+
+  def upvote_ratio
+    return nil if votes.length == 0
+    sprintf("(%.1f%%)", 100.0 * votes.select(&:is_positive?).length / votes.length)
+  end
+
+  def voter_name(vote)
+    if policy(vote).can_see_voter?
+      link_to_user(vote.user, classes: "align-middle")
+    else
+      tag.i("hidden", class: "align-middle")
+    end
+  end
+end

app/components/post_votes_tooltip_component/post_votes_tooltip_component.html.erb

@@ -0,0 +1,13 @@
+<div class="post-votes-tooltip thin-scrollbar">
+  <div class="text-center text-muted">
+    +<%= post.up_score %> / <%= post.down_score %> <%= upvote_ratio %>
+  </div>
+
+  <div class="post-voters">
+    <% votes.each do |vote| %>
+      <div class="post-voter truncate">
+        <%= vote_icon(vote) %> <%= voter_name(vote) %>
+      </div>
+    <% end %>
+  </div>
+</div>

app/components/post_votes_tooltip_component/post_votes_tooltip_component.js

@@ -0,0 +1,65 @@
+import Utility from "../../javascript/src/javascripts/utility.js";
+import { delegate, hideAll } from 'tippy.js';
+import 'tippy.js/dist/tippy.css';
+
+class PostVotesTooltipComponent {
+  // Trigger on the post score link; see PostVotesComponent.
+  static TARGET_SELECTOR = "span.post-votes span.post-score a";
+  static SHOW_DELAY = 125;
+  static HIDE_DELAY = 125;
+  static DURATION = 250;
+  static instance = null;
+
+  static initialize() {
+    if ($(PostVotesTooltipComponent.TARGET_SELECTOR).length === 0) {
+      return;
+    }
+
+    PostVotesTooltipComponent.instance = delegate("body", {
+      allowHTML: true,
+      appendTo: document.querySelector("#post-votes-tooltips"),
+      delay: [PostVotesTooltipComponent.SHOW_DELAY, PostVotesTooltipComponent.HIDE_DELAY],
+      duration: PostVotesTooltipComponent.DURATION,
+      interactive: true,
+      maxWidth: "none",
+      target: PostVotesTooltipComponent.TARGET_SELECTOR,
+      theme: "common-tooltip",
+      touch: false,
+
+      onShow: PostVotesTooltipComponent.onShow,
+      onHide: PostVotesTooltipComponent.onHide,
+    });
+  }
+
+  static async onShow(instance) {
+    let $target = $(instance.reference);
+    let $tooltip = $(instance.popper);
+    let postId = $target.parents("[data-id]").data("id");
+
+    hideAll({ exclude: instance });
+
+    try {
+      $tooltip.addClass("tooltip-loading");
+
+      instance._request = $.get(`/post_votes?search[post_id]=${postId}`, { variant: "tooltip" });
+      let html = await instance._request;
+      instance.setContent(html);
+
+      $tooltip.removeClass("tooltip-loading");
+    } catch (error) {
+      if (error.status !== 0 && error.statusText !== "abort") {
+        Utility.error(`Error displaying votes for post #${postId} (error: ${error.status} ${error.statusText})`);
+      }
+    }
+  }
+
+  static async onHide(instance) {
+    if (instance._request?.state() === "pending") {
+      instance._request.abort();
+    }
+  }
+}
+
+$(document).ready(PostVotesTooltipComponent.initialize);
+
+export default PostVotesTooltipComponent;

app/components/post_votes_tooltip_component/post_votes_tooltip_component.scss

@@ -0,0 +1,16 @@
+.post-votes-tooltip {
+  font-size: var(--text-xs);
+  max-height: 240px;
+
+  .upvote-icon {
+    color: var(--post-upvote-color);
+  }
+
+  .downvote-icon {
+    color: var(--post-downvote-color);
+  }
+
+  .post-voter {
+    max-width: 160px;
+  }
+}

app/controllers/post_votes_controller.rb

@@ -4,6 +4,7 @@ class PostVotesController < ApplicationController
   def index
     @post_votes = authorize PostVote.visible(CurrentUser.user).paginated_search(params, count_pages: true)
     @post_votes = @post_votes.includes(:user, post: [:uploader, :media_asset]) if request.format.html?
+    @post = Post.find(params.dig(:search, :post_id)) if params.dig(:search, :post_id).present?
 
     respond_with(@post_votes)
   end

app/helpers/application_helper.rb

@@ -193,10 +193,10 @@ module ApplicationHelper
     to_sentence(links, **options)
   end
 
-  def link_to_user(user, text = nil)
+  def link_to_user(user, text = nil, classes: nil, **options)
     return "anonymous" if user.blank?
 
-    user_class = "user user-#{user.level_string.downcase}"
+    user_class = "user user-#{user.level_string.downcase} #{classes}"
     user_class += " user-post-approver" if user.can_approve_posts?
     user_class += " user-post-uploader" if user.can_upload_free?
     user_class += " user-banned" if user.is_banned?

app/helpers/components_helper.rb

@@ -20,6 +20,10 @@ module ComponentsHelper
     render PostVotesComponent.new(post: post, **options)
   end
 
+  def render_post_votes_tooltip(post, **options)
+    render PostVotesTooltipComponent.new(post: post, **options)
+  end
+
   def render_post_navbar(post, **options)
     render PostNavbarComponent.new(post: post, **options)
   end

app/javascript/packs/application.js

@@ -43,6 +43,7 @@ import PopupMenuComponent from "../../components/popup_menu_component/popup_menu
 import Post from "../src/javascripts/posts.js";
 import PostModeMenu from "../src/javascripts/post_mode_menu.js";
 import PostTooltip from "../src/javascripts/post_tooltips.js";
+import PostVotesTooltipComponent from "../../components/post_votes_tooltip_component/post_votes_tooltip_component.js";
 import RelatedTag from "../src/javascripts/related_tag.js";
 import Shortcuts from "../src/javascripts/shortcuts.js";
 import TagCounter from "../src/javascripts/tag_counter.js";
@@ -64,6 +65,7 @@ Danbooru.PopupMenuComponent = PopupMenuComponent;
 Danbooru.Post = Post;
 Danbooru.PostModeMenu = PostModeMenu;
 Danbooru.PostTooltip = PostTooltip;
+Danbooru.PostVotesTooltipComponent = PostVotesTooltipComponent;
 Danbooru.RelatedTag = RelatedTag;
 Danbooru.Shortcuts = Shortcuts;
 Danbooru.TagCounter = TagCounter;

app/javascript/src/styles/base/040_colors.css

@@ -218,6 +218,9 @@ html {
   --post-artist-commentary-container-background: var(--grey-0);
   --post-artist-commentary-container-border-color: var(--grey-1);
 
+  --post-upvote-color: var(--link-color);
+  --post-downvote-color: var(--red-5);
+
   --note-body-background: #FFE;
   --note-body-text-color: var(--black);
   --note-body-border-color: var(--black);
@@ -418,6 +421,9 @@ body[data-current-user-theme="dark"] {
   --post-artist-commentary-container-background: var(--grey-8);
   --post-artist-commentary-container-border-color: var(--grey-7);
 
+  --post-upvote-color: var(--link-color);
+  --post-downvote-color: var(--red-4);
+
   --unsaved-note-box-border-color: var(--red-5);
   --movable-note-box-border-color: var(--blue-5);
   --note-preview-border-color: var(--red-5);

app/javascript/src/styles/common/utilities.scss

@@ -22,6 +22,12 @@ $spacer: 0.25rem; /* 4px */
 .text-xs  { font-size: var(--text-xs); }
 .text-sm  { font-size: var(--text-sm); }
 
+.truncate {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .leading-none { line-height: 1; }
 
 .absolute { position: absolute; }
@@ -52,6 +58,9 @@ $spacer: 0.25rem; /* 4px */
 .p-0\.5 { padding: 0.5 * $spacer; }
 .p-4  { padding: 4 * $spacer; }
 
+.pr-2 { padding-right: 2 * $spacer; }
+.pr-4 { padding-right: 4 * $spacer; }
+
 .w-1\/4 { width: 25%; }
 .w-full { width: 100%; }
 
@@ -73,6 +82,60 @@ $spacer: 0.25rem; /* 4px */
 .items-center { align-items: center; }
 .justify-center { justify-content: center; }
 
+.thin-scrollbar {
+  overflow-x: hidden;
+  overflow-y: auto;
+  padding-right: 2 * $spacer;
+  overscroll-behavior: contain; // https://caniuse.com/css-overscroll-behavior
+
+  // Firefox only
+  // https://caniuse.com/?search=scrollbar-width
+  // https://developer.mozilla.org/en-US/docs/Web/CSS/scrollbar-width
+  scrollbar-width: thin;
+
+  &::-webkit-scrollbar {
+    width: 5px;
+    height: 5px;
+  }
+
+  &::-webkit-scrollbar-button {
+    width: 0;
+    height: 0;
+  }
+
+  &::-webkit-scrollbar-thumb {
+    background: var(--post-tooltip-scrollbar-background);
+    border: none;
+    border-radius: 0;
+  }
+
+  &::-webkit-scrollbar-thumb:hover {
+    background: var(--post-tooltip-scrollbar-thumb-color);
+  }
+
+  &::-webkit-scrollbar-thumb:active {
+    background: var(--post-tooltip-scrollbar-thumb-color);
+  }
+
+  &::-webkit-scrollbar-track {
+    background: var(--post-tooltip-scrollbar-track-background);
+    border: none;
+    border-radius: 0;
+  }
+
+  &::-webkit-scrollbar-track:hover {
+    background: var(--post-tooltip-scrollbar-track-background);
+  }
+
+  &::-webkit-scrollbar-track:active {
+    background: var(--post-tooltip-scrollbar-track-background);
+  }
+
+  &::-webkit-scrollbar-corner {
+    background: transparent;
+  }
+}
+
 @media screen and (min-width: 660px) {
   .md\:inline-block { display: inline-block; }
   .md\:flex { display: flex; }

app/javascript/src/styles/specific/post_tooltips.scss

@@ -1,50 +1,6 @@
 $tooltip-line-height: 16px;
 $tooltip-body-height: $tooltip-line-height * 4; // 4 lines high.
 
-@mixin thin-scrollbar {
-  &::-webkit-scrollbar {
-    width: 5px;
-    height: 5px;
-  }
-
-  &::-webkit-scrollbar-button {
-    width: 0;
-    height: 0;
-  }
-
-  &::-webkit-scrollbar-thumb {
-    background: var(--post-tooltip-scrollbar-background);
-    border: none;
-    border-radius: 0;
-  }
-
-  &::-webkit-scrollbar-thumb:hover {
-    background: var(--post-tooltip-scrollbar-thumb-color);
-  }
-
-  &::-webkit-scrollbar-thumb:active {
-    background: var(--post-tooltip-scrollbar-thumb-color);
-  }
-
-  &::-webkit-scrollbar-track {
-    background: var(--post-tooltip-scrollbar-track-background);
-    border: none;
-    border-radius: 0;
-  }
-
-  &::-webkit-scrollbar-track:hover {
-    background: var(--post-tooltip-scrollbar-track-background);
-  }
-
-  &::-webkit-scrollbar-track:active {
-    background: var(--post-tooltip-scrollbar-track-background);
-  }
-
-  &::-webkit-scrollbar-corner {
-    background: transparent;
-  }
-}
-
 .tippy-box[data-theme~="post-tooltip"] {
   min-width: 20em;
   max-width: 40em !important;
@@ -59,7 +15,6 @@ $tooltip-body-height: $tooltip-line-height * 4; // 4 lines high.
     }
 
     .post-tooltip-body {
-      @include thin-scrollbar;
       max-height: $tooltip-body-height;
       overflow-y: auto;
       display: flex;

app/views/layouts/default.html.erb

@@ -101,6 +101,7 @@
   <div id="tooltips">
     <div id="post-tooltips"></div>
     <div id="user-tooltips"></div>
+    <div id="post-votes-tooltips"></div>
     <div id="popup-menus"></div>
   </div>
 

app/views/post_votes/_search.html.erb

@@ -0,0 +1,7 @@
+<%= search_form_for(post_votes_path) do |f| %>
+  <%= f.input :user_name, label: "Voter", input_html: { value: params[:search][:user_name], "data-autocomplete": "user" } %>
+  <%= f.input :post_id, label: "Post", input_html: { value: params[:search][:post_id] } %>
+  <%= f.input :post_tags_match, label: "Tags", input_html: { value: params[:search][:post_tags_match], "data-autocomplete": "tag-query" } %>
+  <%= f.input :score, collection: [["+3", "3"], ["+1", "1"], ["-1", "-1"], ["-3", "-3"]], include_blank: true, selected: params[:search][:score] %>
+  <%= f.submit "Search" %>
+<% end %>

app/views/post_votes/index.html+compact.erb

@@ -0,0 +1,24 @@
+<%= render "posts/partials/common/secondary_links" %>
+
+<div id="c-post-votes">
+  <div id="a-index">
+    <%= render "search" %>
+
+    <%= table_for @post_votes, class: "striped autofit" do |t| %>
+      <% t.column "Score" do |vote| %>
+        <%= link_to sprintf("%+d", vote.score), post_votes_path(search: { score: vote.score }) %>
+      <% end %>
+
+      <% t.column "Voter" do |vote| %>
+        <%= link_to_user vote.user %>
+        <%= link_to "»", post_votes_path(search: { user_name: vote.user.name }) %>
+      <% end %>
+
+      <% t.column "Created" do |vote| %>
+        <%= time_ago_in_words_tagged(vote.created_at) %>
+      <% end %>
+    <% end %>
+
+    <%= numbered_paginator(@post_votes) %>
+  </div>
+</div>

app/views/post_votes/index.html+tooltip.erb

@@ -0,0 +1 @@
+<%= render_post_votes_tooltip(@post, current_user: CurrentUser.user) %>

app/views/post_votes/index.html.erb

@@ -1,12 +1,6 @@
 <div id="c-post-votes">
   <div id="a-index">
-    <%= search_form_for(post_votes_path) do |f| %>
+    <%= render "search" %>
-      <%= f.input :user_name, label: "Voter", input_html: { value: params[:search][:user_name], "data-autocomplete": "user" } %>
-      <%= f.input :post_id, label: "Post", input_html: { value: params[:search][:post_id] } %>
-      <%= f.input :post_tags_match, label: "Tags", input_html: { value: params[:search][:post_tags_match], "data-autocomplete": "tag-query" } %>
-      <%= f.input :score, collection: [["+3", "3"], ["+1", "1"], ["-1", "-1"], ["-3", "-3"]], include_blank: true, selected: params[:search][:score] %>
-      <%= f.submit "Search" %>
-    <% end %>
 
     <%= table_for @post_votes, class: "striped autofit" do |t| %>
       <% t.column "Post" do |vote| %>

app/views/posts/show.html+tooltip.erb

@@ -40,7 +40,7 @@
   <% end %>
 </div>
 
-<div class="post-tooltip-body <%= "has-preview" if params[:preview].truthy? %>">
+<div class="post-tooltip-body thin-scrollbar <%= "has-preview" if params[:preview].truthy? %>">
   <div class="post-tooltip-body-left">
     <% if params[:preview].truthy? %>
       <%= post_preview(@post, show_deleted: true, compact: true) %>

test/functional/post_votes_controller_test.rb

@@ -10,8 +10,8 @@ class PostVotesControllerTest < ActionDispatch::IntegrationTest
     context "index action" do
       setup do
         @user = create(:user, enable_private_favorites: true)
-        create(:post_vote, user: @user, score: 1)
+        @upvote = create(:post_vote, user: @user, score: 1)
-        create(:post_vote, user: @user, score: -1)
+        @downvote = create(:post_vote, user: @user, score: -1)
       end
 
       should "render" do
@@ -19,6 +19,16 @@ class PostVotesControllerTest < ActionDispatch::IntegrationTest
         assert_response :success
       end
 
+      should "render for a compact view" do
+        get post_votes_path(variant: "compact")
+        assert_response :success
+      end
+
+      should "render for a tooltip" do
+        get post_votes_path(search: { post_id: @upvote.post_id }, variant: "tooltip")
+        assert_response :success
+      end
+
       context "as a user" do
         should "show the user all their own votes" do
           get_auth post_votes_path, @user