Restructure source and resource files (#46)

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

src/emojis.cpp

@@ -0,0 +1,118 @@
+#include "emojis.hpp"
+#include <sstream>
+
+EmojiResource::EmojiResource(std::string filepath)
+    : m_filepath(filepath) {}
+
+bool EmojiResource::Load() {
+    m_fp = std::fopen(m_filepath.c_str(), "rb");
+    if (m_fp == nullptr) return false;
+
+    int index_offset;
+    std::fread(&index_offset, 4, 1, m_fp);
+    std::fseek(m_fp, index_offset, SEEK_SET);
+
+    int emojis_count;
+    std::fread(&emojis_count, 4, 1, m_fp);
+    for (int i = 0; i < emojis_count; i++) {
+        std::vector<std::string> shortcodes;
+
+        int shortcodes_count;
+        std::fread(&shortcodes_count, 4, 1, m_fp);
+        for (int j = 0; j < shortcodes_count; j++) {
+            int shortcode_length;
+            std::fread(&shortcode_length, 4, 1, m_fp);
+            std::string shortcode(shortcode_length, '\0');
+            std::fread(shortcode.data(), shortcode_length, 1, m_fp);
+            shortcodes.push_back(std::move(shortcode));
+        }
+
+        int surrogates_count;
+        std::fread(&surrogates_count, 4, 1, m_fp);
+        std::string surrogates(surrogates_count, '\0');
+        std::fread(surrogates.data(), surrogates_count, 1, m_fp);
+        m_patterns.push_back(surrogates);
+
+        int data_size, data_offset;
+        std::fread(&data_size, 4, 1, m_fp);
+        std::fread(&data_offset, 4, 1, m_fp);
+        m_index[surrogates] = { data_offset, data_size };
+
+        for (const auto &shortcode : shortcodes)
+            m_shortcode_index[shortcode] = surrogates;
+
+        m_pattern_shortcode_index[surrogates] = std::move(shortcodes);
+    }
+
+    std::sort(m_patterns.begin(), m_patterns.end(), [](const Glib::ustring &a, const Glib::ustring &b) {
+        return a.size() > b.size();
+    });
+    return true;
+}
+
+Glib::RefPtr<Gdk::Pixbuf> EmojiResource::GetPixBuf(const Glib::ustring &pattern) {
+    const auto it = m_index.find(pattern);
+    if (it == m_index.end()) return Glib::RefPtr<Gdk::Pixbuf>();
+    const int pos = it->second.first;
+    const int len = it->second.second;
+    std::fseek(m_fp, pos, SEEK_SET);
+    std::vector<uint8_t> data(len);
+    std::fread(data.data(), len, 1, m_fp);
+    auto loader = Gdk::PixbufLoader::create();
+    loader->write(static_cast<const guint8 *>(data.data()), data.size());
+    loader->close();
+    return loader->get_pixbuf();
+}
+
+void EmojiResource::ReplaceEmojis(Glib::RefPtr<Gtk::TextBuffer> buf, int size) {
+    auto get_text = [&]() -> auto {
+        Gtk::TextBuffer::iterator a, b;
+        buf->get_bounds(a, b);
+        return buf->get_slice(a, b, true);
+    };
+    auto text = get_text();
+
+    int searchpos;
+    for (const auto &pattern : m_patterns) {
+        searchpos = 0;
+        Glib::RefPtr<Gdk::Pixbuf> pixbuf;
+        while (true) {
+            size_t r = text.find(pattern, searchpos);
+            if (r == Glib::ustring::npos) break;
+            if (!pixbuf) {
+                pixbuf = GetPixBuf(pattern);
+                if (pixbuf)
+                    pixbuf = pixbuf->scale_simple(size, size, Gdk::INTERP_BILINEAR);
+                else
+                    break;
+            }
+            searchpos = r + pattern.size();
+
+            const auto start_it = buf->get_iter_at_offset(r);
+            const auto end_it = buf->get_iter_at_offset(r + pattern.size());
+
+            auto it = buf->erase(start_it, end_it);
+            buf->insert_pixbuf(it, pixbuf);
+
+            int alen = text.size();
+            text = get_text();
+            int blen = text.size();
+            searchpos -= (alen - blen);
+        }
+    }
+}
+
+std::string EmojiResource::GetShortCodeForPattern(const Glib::ustring &pattern) {
+    auto it = m_pattern_shortcode_index.find(pattern);
+    if (it != m_pattern_shortcode_index.end())
+        return it->second.front();
+    return "";
+}
+
+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;
+}