add mention/emoji/channel completion

components/chatwindow.cpp

@@ -52,9 +52,41 @@ ChatWindow::ChatWindow() {
     m_input_scroll->set_max_content_height(200);
     m_input_scroll->set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
 
+    m_completer.SetBuffer(m_input->get_buffer());
+    m_completer.SetGetChannelID([this]() -> auto {
+        return m_active_channel;
+    });
+
+    m_completer.SetGetRecentAuthors([this]() -> auto {
+        const auto &discord = Abaddon::Get().GetDiscordClient();
+        std::vector<Snowflake> ret;
+
+        std::map<Snowflake, Gtk::Widget *> ordered(m_id_to_widget.begin(), m_id_to_widget.end());
+
+        for (auto it = ordered.crbegin(); it != ordered.crend(); it++) {
+            const auto *widget = dynamic_cast<ChatMessageItemContainer *>(it->second);
+            if (widget == nullptr) continue;
+            const auto msg = discord.GetMessage(widget->ID);
+            if (!msg.has_value()) continue;
+            if (std::find(ret.begin(), ret.end(), msg->Author.ID) == ret.end())
+                ret.push_back(msg->Author.ID);
+        }
+
+        const auto chan = discord.GetChannel(m_active_channel);
+        if (chan->GuildID.has_value()) {
+            const auto others = discord.GetUsersInGuild(*chan->GuildID);
+            for (const auto id : others)
+                if (std::find(ret.begin(), ret.end(), id) == ret.end())
+                    ret.push_back(id);
+        }
+
+        return ret;
+    });
+
     m_input_scroll->add(*m_input);
     m_scroll->add(*m_list);
     m_main->add(*m_scroll);
+    m_main->add(m_completer);
     m_main->add(*m_input_scroll);
 }
 
@@ -141,6 +173,9 @@ Snowflake ChatWindow::GetActiveChannel() const {
 }
 
 bool ChatWindow::on_key_press_event(GdkEventKey *e) {
+    if (m_completer.ProcessKeyPress(e))
+        return true;
+
     if (e->keyval == GDK_KEY_Return) {
         if (e->state & GDK_SHIFT_MASK)
             return false;

components/chatwindow.hpp

@@ -6,6 +6,7 @@
 #include <set>
 #include "../discord/discord.hpp"
 #include "chatmessage.hpp"
+#include "completer.hpp"
 
 class ChatWindow {
 public:
@@ -65,6 +66,8 @@ protected:
     Gtk::TextView *m_input;
     Gtk::ScrolledWindow *m_input_scroll;
 
+    Completer m_completer;
+
 public:
     typedef sigc::signal<void, Snowflake, Snowflake> type_signal_action_message_delete;
     typedef sigc::signal<void, Snowflake, Snowflake> type_signal_action_message_edit;

components/completer.cpp

@@ -0,0 +1,323 @@
+#include "completer.hpp"
+#include "../abaddon.hpp"
+#include "../util.hpp"
+
+constexpr const int CompleterHeight = 150;
+constexpr const int MaxCompleterEntries = 15;
+
+Completer::Completer() {
+    set_reveal_child(false);
+    set_transition_type(Gtk::REVEALER_TRANSITION_TYPE_NONE); // only SLIDE_UP and NONE work decently
+
+    m_scroll.set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
+    m_scroll.set_max_content_height(CompleterHeight);
+    m_scroll.set_size_request(-1, CompleterHeight);
+    m_scroll.set_placement(Gtk::CORNER_BOTTOM_LEFT);
+
+    m_list.set_adjustment(m_scroll.get_vadjustment());
+    m_list.set_focus_vadjustment(m_scroll.get_vadjustment());
+    m_list.get_style_context()->add_class("completer");
+    m_list.set_activate_on_single_click(true);
+
+    m_list.set_focus_on_click(false);
+    set_can_focus(false);
+
+    m_list.signal_row_activated().connect(sigc::mem_fun(*this, &Completer::OnRowActivate));
+
+    m_scroll.add(m_list);
+    add(m_scroll);
+    show_all();
+}
+
+Completer::Completer(const Glib::RefPtr<Gtk::TextBuffer> &buf)
+    : Completer() {
+    SetBuffer(buf);
+}
+
+void Completer::SetBuffer(const Glib::RefPtr<Gtk::TextBuffer> &buf) {
+    m_buf = buf;
+    m_buf->signal_changed().connect(sigc::mem_fun(*this, &Completer::OnTextBufferChanged));
+}
+
+bool Completer::ProcessKeyPress(GdkEventKey *e) {
+    if (!IsShown()) return false;
+    if (e->type != GDK_KEY_PRESS) return false;
+
+    switch (e->keyval) {
+        case GDK_KEY_Down: {
+            if (m_entries.size() == 0) return true;
+            const int index = m_list.get_selected_row()->get_index();
+            if (index >= m_entries.size() - 1) return true;
+            m_list.select_row(*m_entries[index + 1]);
+            ScrollListBoxToSelected(m_list);
+        }
+            return true;
+        case GDK_KEY_Up: {
+            if (m_entries.size() == 0) return true;
+            const int index = m_list.get_selected_row()->get_index();
+            if (index == 0) return true;
+            m_list.select_row(*m_entries[index - 1]);
+            ScrollListBoxToSelected(m_list);
+        }
+            return true;
+        case GDK_KEY_Return: {
+            if (m_entries.size() == 0) return true;
+            DoCompletion(m_list.get_selected_row());
+        }
+            return true;
+        default:
+            break;
+    }
+
+    return false;
+}
+
+void Completer::SetGetRecentAuthors(get_recent_authors_cb cb) {
+    m_recent_authors_cb = cb;
+}
+
+void Completer::SetGetChannelID(get_channel_id_cb cb) {
+    m_channel_id_cb = cb;
+}
+
+bool Completer::IsShown() const {
+    return get_child_revealed();
+}
+
+CompleterEntry *Completer::CreateEntry(const Glib::ustring &completion) {
+    auto entry = Gtk::manage(new CompleterEntry(completion, m_entries.size()));
+    m_entries.push_back(entry);
+    entry->show_all();
+    m_list.add(*entry);
+    return entry;
+}
+
+void Completer::CompleteMentions(const Glib::ustring &term) {
+    if (!m_recent_authors_cb)
+        return;
+
+    const auto &discord = Abaddon::Get().GetDiscordClient();
+
+    Snowflake channel_id;
+    if (m_channel_id_cb)
+        channel_id = m_channel_id_cb();
+    auto author_ids = m_recent_authors_cb();
+    if (channel_id.IsValid()) {
+        const auto chan = discord.GetChannel(channel_id);
+        if (chan->GuildID.has_value()) {
+            const auto members = discord.GetUsersInGuild(*chan->GuildID);
+            for (const auto x : members)
+                if (std::find(author_ids.begin(), author_ids.end(), x) == author_ids.end())
+                    author_ids.push_back(x);
+        }
+    }
+    const auto me = discord.GetUserData().ID;
+    int i = 0;
+    for (const auto id : author_ids) {
+        if (id == me) continue;
+        const auto author = discord.GetUser(id);
+        if (!author.has_value()) continue;
+        if (!StringContainsCaseless(author->Username, term)) continue;
+        if (i++ > 15) break;
+
+        auto entry = CreateEntry(author->GetMention());
+
+        entry->SetText(author->Username + "#" + author->Discriminator);
+
+        if (channel_id.IsValid()) {
+            const auto chan = discord.GetChannel(channel_id);
+            if (chan.has_value() && chan->GuildID.has_value()) {
+                const auto role_id = discord.GetMemberHoistedRole(*chan->GuildID, id, true);
+                if (role_id.IsValid()) {
+                    const auto role = discord.GetRole(role_id);
+                    if (role.has_value())
+                        entry->SetTextColor(role->Color);
+                }
+            }
+        }
+
+        auto &img = Abaddon::Get().GetImageManager();
+        const auto placeholder = img.GetPlaceholder(24);
+        if (author->HasAvatar()) {
+            auto pb = img.GetFromURLIfCached(author->GetAvatarURL());
+            if (pb) {
+                entry->SetImage(pb);
+            } else {
+                entry->SetImage(placeholder);
+                img.LoadFromURL(author->GetAvatarURL(), sigc::mem_fun(*entry, &CompleterEntry::SetImage));
+            }
+        } else
+            entry->SetImage(placeholder);
+    }
+}
+
+void Completer::CompleteEmojis(const Glib::ustring &term) {
+    if (!m_channel_id_cb)
+        return;
+
+    const auto &discord = Abaddon::Get().GetDiscordClient();
+    const auto channel_id = m_channel_id_cb();
+    const auto channel = discord.GetChannel(channel_id);
+    if (!channel->GuildID.has_value()) return;
+    const auto guild = discord.GetGuild(*channel->GuildID);
+
+    const auto make_entry = [&](const Glib::ustring &name, const Glib::ustring &completion, const Glib::ustring &url = "") -> CompleterEntry * {
+        const auto entry = CreateEntry(completion);
+        entry->SetText(name);
+        if (url == "") return entry;
+        auto &img = Abaddon::Get().GetImageManager();
+        const auto placeholder = img.GetPlaceholder(24);
+        const auto pb = img.GetFromURLIfCached(url);
+        if (pb)
+            entry->SetImage(pb);
+        else {
+            entry->SetImage(placeholder);
+            img.LoadFromURL(url, sigc::mem_fun(*entry, &CompleterEntry::SetImage));
+        }
+        return entry;
+    };
+
+    int i = 0;
+    for (const auto tmp : guild->Emojis) {
+        const auto emoji = discord.GetEmoji(tmp.ID);
+        if (!emoji.has_value()) continue;
+        if (emoji->IsAnimated.has_value() && *emoji->IsAnimated) continue;
+        if (term.size() > 0)
+            if (!StringContainsCaseless(emoji->Name, term)) continue;
+        if (i++ > MaxCompleterEntries) break;
+
+        const auto entry = make_entry(emoji->Name, "<:" + emoji->Name + ":" + std::to_string(emoji->ID) + ">", emoji->GetURL());
+    }
+
+    // if <15 guild emojis match then load up stock
+    if (i < 15) {
+        auto &emojis = Abaddon::Get().GetEmojis();
+        const auto &shortcodes = emojis.GetShortCodes();
+        for (const auto &[shortcode, pattern] : shortcodes) {
+            if (!StringContainsCaseless(shortcode, term)) continue;
+            if (i++ > 15) break;
+            const auto &pb = emojis.GetPixBuf(pattern);
+            if (!pb) continue;
+            const auto entry = make_entry(shortcode, pattern);
+            entry->SetImage(pb);
+        }
+    }
+}
+
+void Completer::CompleteChannels(const Glib::ustring &term) {
+    if (!m_channel_id_cb)
+        return;
+
+    const auto &discord = Abaddon::Get().GetDiscordClient();
+    const auto channel_id = m_channel_id_cb();
+    const auto channel = discord.GetChannel(channel_id);
+    if (!channel->GuildID.has_value()) return;
+    const auto channels = discord.GetChannelsInGuild(*channel->GuildID);
+    int i = 0;
+    for (const auto chan_id : channels) {
+        const auto chan = discord.GetChannel(chan_id);
+        if (chan->Type == ChannelType::GUILD_VOICE || chan->Type == ChannelType::GUILD_CATEGORY) continue;
+        if (!StringContainsCaseless(*chan->Name, term)) continue;
+        if (i++ > MaxCompleterEntries) break;
+        const auto entry = CreateEntry("<#" + std::to_string(chan_id) + ">");
+        entry->SetText("#" + *chan->Name);
+    }
+}
+
+void Completer::DoCompletion(Gtk::ListBoxRow *row) {
+    const int index = row->get_index();
+    const auto completion = m_entries[index]->GetCompletion();
+    const auto it = m_buf->erase(m_start, m_end); // entry is deleted here
+    m_buf->insert(it, completion + " ");
+}
+
+void Completer::OnRowActivate(Gtk::ListBoxRow *row) {
+    DoCompletion(row);
+}
+
+void Completer::OnTextBufferChanged() {
+    const auto term = GetTerm();
+
+    for (auto it = m_entries.begin(); it != m_entries.end();) {
+        delete *it;
+        it = m_entries.erase(it);
+    }
+
+    switch (term[0]) {
+        case '@':
+            CompleteMentions(term.substr(1));
+            break;
+        case ':':
+            CompleteEmojis(term.substr(1));
+            break;
+        case '#':
+            CompleteChannels(term.substr(1));
+            break;
+        default:
+            break;
+    }
+    if (m_entries.size() > 0) {
+        m_list.select_row(*m_entries[0]);
+        set_reveal_child(true);
+    } else {
+        set_reveal_child(false);
+    }
+}
+
+Glib::ustring Completer::GetTerm() {
+    const auto iter = m_buf->get_insert()->get_iter();
+    Gtk::TextBuffer::iterator dummy;
+    if (!iter.backward_search(" ", Gtk::TEXT_SEARCH_TEXT_ONLY, m_start, dummy))
+        m_buf->get_bounds(m_start, dummy);
+    else
+        m_start.forward_char(); // 1 behind
+    if (!iter.forward_search(" ", Gtk::TEXT_SEARCH_TEXT_ONLY, dummy, m_end))
+        m_buf->get_bounds(dummy, m_end);
+    return m_start.get_text(m_end);
+}
+
+CompleterEntry::CompleterEntry(const Glib::ustring &completion, int index)
+    : m_index(index)
+    , m_completion(completion)
+    , m_box(Gtk::ORIENTATION_HORIZONTAL) {
+    set_halign(Gtk::ALIGN_START);
+    get_style_context()->add_class("completer-entry");
+    set_can_focus(false);
+    set_focus_on_click(false);
+    m_box.show();
+    add(m_box);
+}
+
+void CompleterEntry::SetTextColor(int color) {
+    if (m_text == nullptr) return;
+    const auto cur = m_text->get_text();
+    m_text->set_markup("<span color=\"#" + IntToCSSColor(color) + "\">" + Glib::Markup::escape_text(cur) + "</span>");
+}
+
+void CompleterEntry::SetText(const Glib::ustring &text) {
+    if (m_text == nullptr) {
+        m_text = Gtk::manage(new Gtk::Label);
+        m_text->get_style_context()->add_class("completer-entry-label");
+        m_text->show();
+        m_box.pack_end(*m_text);
+    }
+    m_text->set_label(text);
+}
+
+void CompleterEntry::SetImage(const Glib::RefPtr<Gdk::Pixbuf> &pb) {
+    if (m_img == nullptr) {
+        m_img = Gtk::manage(new Gtk::Image);
+        m_img->get_style_context()->add_class("completer-entry-image");
+        m_img->show();
+        m_box.pack_start(*m_img);
+    }
+    m_img->property_pixbuf() = pb->scale_simple(24, 24, Gdk::INTERP_BILINEAR);
+}
+
+int CompleterEntry::GetIndex() const {
+    return m_index;
+}
+
+Glib::ustring CompleterEntry::GetCompletion() const {
+    return m_completion;
+}

components/completer.hpp

@@ -0,0 +1,61 @@
+#pragma once
+#include <gtkmm.h>
+#include <functional>
+#include "../discord/snowflake.hpp"
+
+class CompleterEntry : public Gtk::ListBoxRow {
+public:
+    CompleterEntry(const Glib::ustring &completion, int index);
+    void SetTextColor(int color); // SetText will reset
+    void SetText(const Glib::ustring &text);
+    void SetImage(const Glib::RefPtr<Gdk::Pixbuf> &pb);
+
+    int GetIndex() const;
+    Glib::ustring GetCompletion() const;
+
+private:
+    Glib::ustring m_completion;
+    int m_index;
+    Gtk::Box m_box;
+    Gtk::Label *m_text = nullptr;
+    Gtk::Image *m_img = nullptr;
+};
+
+class Completer : public Gtk::Revealer {
+public:
+    Completer();
+    Completer(const Glib::RefPtr<Gtk::TextBuffer> &buf);
+
+    void SetBuffer(const Glib::RefPtr<Gtk::TextBuffer> &buf);
+    bool ProcessKeyPress(GdkEventKey *e);
+
+    using get_recent_authors_cb = std::function<std::vector<Snowflake>()>;
+    void SetGetRecentAuthors(get_recent_authors_cb cb); // maybe a better way idk
+    using get_channel_id_cb = std::function<Snowflake()>;
+    void SetGetChannelID(get_channel_id_cb cb);
+
+    bool IsShown() const;
+
+private:
+    CompleterEntry *CreateEntry(const Glib::ustring &completion);
+    void CompleteMentions(const Glib::ustring &term);
+    void CompleteEmojis(const Glib::ustring &term);
+    void CompleteChannels(const Glib::ustring &term);
+    void DoCompletion(Gtk::ListBoxRow *row);
+
+    std::vector<CompleterEntry *> m_entries;
+
+    void OnRowActivate(Gtk::ListBoxRow *row);
+    void OnTextBufferChanged();
+    Glib::ustring GetTerm();
+
+    Gtk::TextBuffer::iterator m_start;
+    Gtk::TextBuffer::iterator m_end;
+
+    Gtk::ScrolledWindow m_scroll;
+    Gtk::ListBox m_list;
+    Glib::RefPtr<Gtk::TextBuffer> m_buf;
+
+    get_recent_authors_cb m_recent_authors_cb;
+    get_channel_id_cb m_channel_id_cb;
+};

css/main.css

@@ -121,6 +121,19 @@
     color: #cfd8dc;
 }
 
+.completer {
+	background-color: #2c3e50;
+	padding: 5px;
+}
+
+.completer-entry {
+	color: #cfd8dc;
+}
+
+.completer-entry-image {
+	margin-right: 6px;
+}
+
 paned separator {
     background: #37474f;
 }

discord/user.cpp

@@ -13,6 +13,10 @@ Snowflake User::GetHoistedRole(Snowflake guild_id, bool with_color) const {
     return Abaddon::Get().GetDiscordClient().GetMemberHoistedRole(guild_id, ID, with_color);
 }
 
+std::string User::GetMention() const {
+    return "<@" + std::to_string(ID) + ">";
+}
+
 void from_json(const nlohmann::json &j, User &m) {
     JS_D("id", m.ID);
     JS_D("username", m.Username);

discord/user.hpp

@@ -31,4 +31,5 @@ struct User {
     bool HasAvatar() const;
     std::string GetAvatarURL(std::string ext = "png", std::string size = "32") const;
     Snowflake GetHoistedRole(Snowflake guild_id, bool with_color = false) const;
+    std::string GetMention() const;
 };

emojis.cpp

@@ -13,14 +13,24 @@ bool EmojiResource::Load() {
     int num_entries;
     std::fread(&num_entries, 4, 1, m_fp);
     for (int i = 0; i < num_entries; i++) {
-        static int strsize, len, pos;
-        std::fread(&strsize, 4, 1, m_fp);
-        std::vector<char> str(strsize);
-        std::fread(str.data(), strsize, 1, m_fp);
+        static int pattern_strlen, shortcode_strlen, len, pos;
+        std::fread(&pattern_strlen, 4, 1, m_fp);
+        std::string pattern(pattern_strlen, '\0');
+        std::fread(pattern.data(), pattern_strlen, 1, m_fp);
+
+        const auto pattern_hex = HexToPattern(pattern);
+
+        std::fread(&shortcode_strlen, 4, 1, m_fp);
+        std::string shortcode(shortcode_strlen, '\0');
+        if (shortcode_strlen > 0) {
+            std::fread(shortcode.data(), shortcode_strlen, 1, m_fp);
+            m_shortcode_index[shortcode] = pattern_hex;
+        }
+
         std::fread(&len, 4, 1, m_fp);
         std::fread(&pos, 4, 1, m_fp);
-        m_index[std::string(str.begin(), str.end())] = std::make_pair(pos, len);
-        m_patterns.push_back(HexToPattern(Glib::ustring(str.begin(), str.end())));
+        m_index[pattern] = std::make_pair(pos, len);
+        m_patterns.push_back(pattern_hex);
     }
     std::sort(m_patterns.begin(), m_patterns.end(), [](const Glib::ustring &a, const Glib::ustring &b) {
         return a.size() > b.size();
@@ -113,3 +123,7 @@ void EmojiResource::ReplaceEmojis(Glib::RefPtr<Gtk::TextBuffer> buf, int size) {
 const std::vector<Glib::ustring> &EmojiResource::GetPatterns() const {
     return m_patterns;
 }
+
+const std::map<std::string, std::string> &EmojiResource::GetShortCodes() const {
+    return m_shortcode_index;
+}

emojis.hpp

@@ -15,9 +15,11 @@ public:
     static Glib::ustring PatternToHex(const Glib::ustring &pattern);
     static Glib::ustring HexToPattern(Glib::ustring hex);
     const std::vector<Glib::ustring> &GetPatterns() const;
+    const std::map<std::string, std::string> &GetShortCodes() const;
     void ReplaceEmojis(Glib::RefPtr<Gtk::TextBuffer> buf, int size = 24);
 
 private:
+    std::map<std::string, std::string> m_shortcode_index;         // shortcode -> pattern
     std::unordered_map<std::string, std::pair<int, int>> m_index; // pattern -> [pos, len]
     FILE *m_fp = nullptr;
     std::string m_filepath;

util.cpp

@@ -64,6 +64,30 @@ std::string HumanReadableBytes(uint64_t bytes) {
     return std::to_string(bytes) + x[order];
 }
 
+void ScrollListBoxToSelected(Gtk::ListBox &list) {
+    auto cb = [&list]() -> bool {
+        const auto selected = list.get_selected_row();
+        if (selected == nullptr) return false;
+        int x, y;
+        selected->translate_coordinates(list, 0, 0, x, y);
+        if (y < 0) return false;
+        const auto adj = list.get_adjustment();
+        if (!adj) return false;
+        int min, nat;
+        selected->get_preferred_height(min, nat);
+        adj->set_value(y - (adj->get_page_size() - nat) / 2.0);
+
+        return false;
+    };
+    Glib::signal_idle().connect(sigc::track_obj(cb, list));
+}
+
+// surely theres a better way to do this
+bool StringContainsCaseless(const Glib::ustring &str, const Glib::ustring &sub) {
+    const auto regex = Glib::Regex::create(Glib::Regex::escape_string(sub), Glib::REGEX_CASELESS);
+    return regex->match(str);
+}
+
 std::string IntToCSSColor(int color) {
     int r = (color & 0xFF0000) >> 16;
     int g = (color & 0x00FF00) >> 8;

util.hpp

@@ -105,3 +105,7 @@ inline void AlphabeticalSort(T start, T end, std::function<std::string(const typ
         return ac[0] || ac[5];
     });
 }
+
+void ScrollListBoxToSelected(Gtk::ListBox &list);
+
+bool StringContainsCaseless(const Glib::ustring &str, const Glib::ustring &sub);