Restructure source and resource files (#46)

importantly, res is now res/res and css is now res/css

src/components/completer.hpp

@@ -0,0 +1,68 @@
+#pragma once
+#include <gtkmm.h>
+#include <functional>
+#include "lazyimage.hpp"
+#include "discord/snowflake.hpp"
+
+constexpr static int CompleterImageSize = 24;
+
+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);
+    void SetImage(const std::string &url);
+    void SetAnimation(const std::string &url);
+
+    int GetIndex() const;
+    Glib::ustring GetCompletion() const;
+
+private:
+    void CheckImage();
+
+    Glib::ustring m_completion;
+    int m_index;
+    Gtk::Box m_box;
+    Gtk::Label *m_text = nullptr;
+    LazyImage *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;
+};