1 files changed, 235 insertions, 0 deletions
diff --git a/src/util/recently-used-fonts.cpp b/src/util/recently-used-fonts.cpp
new file mode 100644
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+++ b/src/util/recently-used-fonts.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * This file contains recently used font list related logic. The functions to manage the
+ * recently used fonts are defined in this file.
+ *
+ * Authors:
+ *   Vaibhav Malik <vaibhavmalik2018@gmail.com>
+ *
+ * The contents of this file may be used under the GNU General Public License Version 2 or later.
+ *
+ */
+
+#include "recently-used-fonts.h"
+#include "font-collections.h"
+#include "libnrtype/font-lister.h"
+#include "preferences.h"
+
+#include <fstream>
+// #include <iostream>
+
+#ifdef _WIN32
+#include<direct.h>
+#endif
+#include <sys/stat.h>
+#include <sys/types.h>
+
+using namespace Inkscape::IO::Resource;
+
+namespace Inkscape {
+
+// get_instance method for the singleton class.
+RecentlyUsedFonts* RecentlyUsedFonts::get()
+{
+    static RecentlyUsedFonts* s_instance = new Inkscape::RecentlyUsedFonts();
+    return s_instance;
+}
+
+RecentlyUsedFonts::RecentlyUsedFonts()
+{
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    _max_size = prefs->getInt("/tools/text/recently_used_fonts_size", 10);
+
+    init();
+}
+
+void RecentlyUsedFonts::init()
+{
+    // Clear the previous collections(we may be re-reading).
+    clear();
+
+    // Generate the name of the file.
+    std::string file_path = get_path_string(USER, FONTCOLLECTIONS, RECENTFONTS_FILENAME);
+    std::string file_dir = get_path_string(USER, FONTCOLLECTIONS, nullptr);
+
+    static bool create_dir = true;
+
+    if(create_dir) {
+#ifdef _WIN32
+        mkdir(file_dir.c_str());
+#else
+        mkdir(file_dir.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+#endif
+        create_dir = false;
+    }
+
+    // Read the file.
+    read(file_path);
+}
+
+void RecentlyUsedFonts::clear()
+{
+    _recent_list.clear();
+}
+
+/*
+void RecentlyUsedFonts::print_recently_used_fonts()
+{
+    std::cout << std::endl << "********************" << std::endl;
+
+    for(auto const& font: _recent_list) {
+        std::cout << font << std::endl;
+    }
+
+    std::cout << std::endl << "********************" << std::endl;
+}
+*/
+
+// Read fonts stored in a collection file.
+void RecentlyUsedFonts::read(const Glib::ustring& file_path)
+{
+    // Filestream object to read data from the file.
+    std::ifstream input_file(file_path);
+
+    // Check if the file opened or not.
+    if (input_file.is_open()) {
+        // Now read all the fonts stored in this file.
+        std::string line;
+        FontCollections *font_collections = Inkscape::FontCollections::get();
+
+        while (getline(input_file, line)) {
+            // Get rid of unwanted characters from the left and right.
+            line = font_collections->trim_left_and_right(line);
+            Glib::ustring font = line;
+
+            // Now check if the font is installed on the system because it is possible
+            // that a previously installed font may not be available now.
+            if (Inkscape::FontLister::get_instance()->font_installed_on_system(font)) {
+                _recent_list.push_front(font);
+            }
+        }
+
+        // Important: Close the file after use!
+        input_file.close();
+    } else {
+        // Error: Failed to open the file.
+        // std::cout << "Failed to open file: " << file_path << std::endl;
+    }
+}
+
+// Function to write the recently used fonts to a file.
+void RecentlyUsedFonts::write_recently_used_fonts()
+{
+    // Step 1: Fetch the collections directory from the system directory.
+
+    // Generate the name of the file.
+    std::string file_path = get_path_string(USER, FONTCOLLECTIONS, RECENTFONTS_FILENAME);
+
+    std::fstream output_file;
+    output_file.open(file_path, std::fstream::out);
+
+    // Check if the file opened or not.
+    if (output_file.is_open()) {
+        for (auto it = _recent_list.rbegin(); it != _recent_list.rend(); ++it) {
+            output_file << (*it) << '\n';
+        }
+
+        // Important: Close the file after use.
+        output_file.close();
+        init();
+    } else {
+        // Error: Failed to open the file.
+        // std::cout << "Failed to open file: " << file_path << std::endl;
+    }
+}
+
+void RecentlyUsedFonts::change_max_list_size(const int& max_size)
+{
+    // std::cout << "Changing size from: " << _max_size << " to: " << max_size << "\n";
+
+    if(max_size < 0) {
+        std::cerr << "Can not set negative size" << std::endl;
+        return;
+    }
+
+    _max_size = max_size;
+
+    // If the font that are currently stored in the recent list are more than the
+    // new max size of the list, then we need to remove the least recent fonts
+    // to make sure that the list if not longer than the max size.
+    int difference = _recent_list.size() - _max_size;
+
+    if(difference > 0) {
+        while(difference--) {
+            _recent_list.pop_back();
+        }
+    }
+
+    update_signal.emit();
+}
+
+// This function is called whenever the user clicks the Apply button in
+// the text and font dialog. It inserts the selected family into the
+// recently used list and it's correct position.
+void RecentlyUsedFonts::prepend_to_list(const Glib::ustring& font_name) {
+    /*
+     * Look-Up step
+     */
+    auto it = std::find(_recent_list.begin(), _recent_list.end(), font_name);
+
+    /*
+     * If the element is already present
+     * Delete it, because we'll re-insert it at the top
+     */
+     if(it != _recent_list.end()) {
+         _recent_list.erase(it);
+     }
+     else {
+         /*
+          * Insert the element in the list.
+          */
+         _recent_list.push_front(font_name);
+     }
+
+     /*
+      * Check if the current size exceeds the max size
+      * If yes, then delete an element from the end
+      */
+     if(_recent_list.size() > _max_size) {
+         _recent_list.pop_back();
+     }
+
+     write_recently_used_fonts();
+     update_signal.emit();
+}
+
+/*
+bool RecentlyUsedFonts::is_empty()
+{
+    return _max_size == 0;
+}
+*/
+
+int RecentlyUsedFonts::get_count()
+{
+    return _recent_list.size();
+}
+
+// Returns the recently used fonts.
+const std::list <Glib::ustring> RecentlyUsedFonts::get_fonts()
+{
+    return _recent_list;
+}
+
+} // Namespace
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :