diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 904 |
1 files changed, 904 insertions, 0 deletions
@@ -0,0 +1,904 @@ +#include <gtk/gtk.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <ctype.h> +#include <gdk/gdkkeysyms.h> +#include "md_render.h" + +GtkWidget *text_view_editor; +GtkWidget *text_view_viewer; +GtkTextBuffer *buffer_editor; +GtkTextBuffer *buffer_viewer; +void update_line_numbers(); + +GtkWidget *statusbar; +GtkWidget *toc_sidebar; +GtkListStore *toc_store; +char *current_filename = NULL; +int dark_mode = 1; +int line_wrap = 1; +int auto_save_enabled = 0; +int show_toc = 1; +GList *recent_files = NULL; +guint status_context_id; +GtkWidget *line_num_view; +GtkTextBuffer *buffer_line_nums; +GtkWidget *find_dialog = NULL; +GtkWidget *find_entry, *replace_entry; +guint debounce_id = 0; + +typedef struct { + GList *undo_stack; + GList *redo_stack; + int max_depth; +} UndoManager; + +UndoManager *undo_manager; + +void undo_push(const char *text); +void undo_perform(); +void redo_perform(); +void undo_free(); + +void update_preview(); +static void on_editor_changed(GtkTextBuffer *buffer, gpointer user_data); + +void load_config(); +void save_config(); +void add_recent_file(const char *filename); +void update_recent_menu(); +GtkWidget *recent_menu; + +enum { + COL_TEXT, + COL_LINE, + NUM_COLS +}; + +void update_ui_colors() { + GdkColor bg, fg; + if (dark_mode) { + gdk_color_parse("#1e1e1e", &bg); + gdk_color_parse("#ffffff", &fg); + } else { + gdk_color_parse("#ffffff", &bg); + gdk_color_parse("#24292e", &fg); + } + gtk_widget_modify_base(text_view_editor, GTK_STATE_NORMAL, &bg); + gtk_widget_modify_text(text_view_editor, GTK_STATE_NORMAL, &fg); + gtk_widget_modify_base(text_view_viewer, GTK_STATE_NORMAL, &bg); + gtk_widget_modify_text(text_view_viewer, GTK_STATE_NORMAL, &fg); +} + +void save_config() { + char *config_dir = g_build_filename(g_get_user_config_dir(), "mdviewer", NULL); + g_mkdir_with_parents(config_dir, 0755); + char *config_path = g_build_filename(config_dir, "config", NULL); + FILE *f = fopen(config_path, "w"); + if (f) { + fprintf(f, "dark_mode=%d\n", dark_mode); + fprintf(f, "line_wrap=%d\n", line_wrap); + fprintf(f, "auto_save=%d\n", auto_save_enabled); + fprintf(f, "show_toc=%d\n", show_toc); + fclose(f); + } + + char *recent_path = g_build_filename(config_dir, "recent", NULL); + f = fopen(recent_path, "w"); + if (f) { + for (GList *l = recent_files; l; l = l->next) { + fprintf(f, "%s\n", (char*)l->data); + } + fclose(f); + } + g_free(config_path); + g_free(recent_path); + g_free(config_dir); +} + +void load_config() { + char *config_path = g_build_filename(g_get_user_config_dir(), "mdviewer", "config", NULL); + FILE *f = fopen(config_path, "r"); + if (f) { + char line[128]; + while (fgets(line, sizeof(line), f)) { + if (strncmp(line, "dark_mode=", 10) == 0) dark_mode = atoi(line + 10); + else if (strncmp(line, "line_wrap=", 10) == 0) line_wrap = atoi(line + 10); + else if (strncmp(line, "auto_save=", 10) == 0) auto_save_enabled = atoi(line + 10); + else if (strncmp(line, "show_toc=", 9) == 0) show_toc = atoi(line + 9); + } + fclose(f); + } + g_free(config_path); + + char *recent_path = g_build_filename(g_get_user_config_dir(), "mdviewer", "recent", NULL); + f = fopen(recent_path, "r"); + if (f) { + char line[1024]; + while (fgets(line, sizeof(line), f)) { + line[strcspn(line, "\n")] = 0; + if (strlen(line) > 0) + recent_files = g_list_append(recent_files, g_strdup(line)); + } + fclose(f); + } + g_free(recent_path); +} + +void load_file(const char *filename); + +static void on_recent_activate(GtkMenuItem *item, gpointer user_data) { + load_file((char*)user_data); +} + +void update_recent_menu() { + if (!recent_menu) return; + GList *children = gtk_container_get_children(GTK_CONTAINER(recent_menu)); + for (GList *l = children; l; l = l->next) gtk_widget_destroy(GTK_WIDGET(l->data)); + g_list_free(children); + + for (GList *l = recent_files; l; l = l->next) { + GtkWidget *item = gtk_menu_item_new_with_label((char*)l->data); + g_signal_connect(item, "activate", G_CALLBACK(on_recent_activate), l->data); + gtk_menu_shell_append(GTK_MENU_SHELL(recent_menu), item); + } + gtk_widget_show_all(recent_menu); +} + +void undo_push(const char *text) { + if (undo_manager->undo_stack && strcmp((char*)undo_manager->undo_stack->data, text) == 0) return; + + undo_manager->undo_stack = g_list_prepend(undo_manager->undo_stack, g_strdup(text)); + if (g_list_length(undo_manager->undo_stack) > (guint)undo_manager->max_depth) { + GList *last = g_list_last(undo_manager->undo_stack); + g_free(last->data); + undo_manager->undo_stack = g_list_remove_link(undo_manager->undo_stack, last); + g_list_free_1(last); + } + + // Clear redo stack on new change + g_list_free_full(undo_manager->redo_stack, g_free); + undo_manager->redo_stack = NULL; +} + +void undo_perform() { + if (!undo_manager->undo_stack || !undo_manager->undo_stack->next) return; + + // Current state to redo + undo_manager->redo_stack = g_list_prepend(undo_manager->redo_stack, undo_manager->undo_stack->data); + undo_manager->undo_stack = g_list_remove_link(undo_manager->undo_stack, undo_manager->undo_stack); + + char *text = (char*)undo_manager->undo_stack->data; + g_signal_handlers_block_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + gtk_text_buffer_set_text(buffer_editor, text, -1); + g_signal_handlers_unblock_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + update_preview(); +} + +void redo_perform() { + if (!undo_manager->redo_stack) return; + + char *text = (char*)undo_manager->redo_stack->data; + undo_manager->undo_stack = g_list_prepend(undo_manager->undo_stack, text); + undo_manager->redo_stack = g_list_remove_link(undo_manager->redo_stack, undo_manager->redo_stack); + + g_signal_handlers_block_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + gtk_text_buffer_set_text(buffer_editor, text, -1); + g_signal_handlers_unblock_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + update_preview(); +} + +void undo_free() { + g_list_free_full(undo_manager->undo_stack, g_free); + g_list_free_full(undo_manager->redo_stack, g_free); + g_free(undo_manager); +} + +void add_recent_file(const char *filename) { + for (GList *l = recent_files; l; l = l->next) { + if (strcmp((char*)l->data, filename) == 0) { + recent_files = g_list_remove_link(recent_files, l); + g_free(l->data); + g_list_free_1(l); + break; + } + } + recent_files = g_list_prepend(recent_files, g_strdup(filename)); + if (g_list_length(recent_files) > 10) { + GList *last = g_list_last(recent_files); + g_free(last->data); + recent_files = g_list_remove_link(recent_files, last); + g_list_free_1(last); + } + update_recent_menu(); +} + +void update_toc() { + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer_editor, &start, &end); + char *text = gtk_text_buffer_get_text(buffer_editor, &start, &end, FALSE); + + GList *headers = md_get_headers(text); + gtk_list_store_clear(toc_store); + + for (GList *l = headers; l != NULL; l = l->next) { + MdHeader *h = (MdHeader*)l->data; + GtkTreeIter iter; + gtk_list_store_append(toc_store, &iter); + char *indented = g_strdup_printf("%*s%s", (h->level - 1) * 2, "", h->text); + gtk_list_store_set(toc_store, &iter, COL_TEXT, indented, COL_LINE, h->line, -1); + g_free(indented); + } + + md_free_headers(headers); + g_free(text); +} + +static void on_toc_row_activated(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data) { + GtkTreeIter iter; + if (gtk_tree_model_get_iter(GTK_TREE_MODEL(toc_store), &iter, path)) { + int line; + gtk_tree_model_get(GTK_TREE_MODEL(toc_store), &iter, COL_LINE, &line, -1); + + GtkTextIter text_iter; + gtk_text_buffer_get_iter_at_line(buffer_editor, &text_iter, line); + gtk_text_view_scroll_to_iter(GTK_TEXT_VIEW(text_view_editor), &text_iter, 0.0, TRUE, 0.0, 0.0); + + gtk_text_buffer_get_iter_at_line(buffer_viewer, &text_iter, line); + gtk_text_view_scroll_to_iter(GTK_TEXT_VIEW(text_view_viewer), &text_iter, 0.0, TRUE, 0.0, 0.0); + } +} + +static gboolean on_viewer_motion_notify(GtkWidget *widget, GdkEventMotion *event, gpointer user_data) { + GtkTextIter iter; + int x, y; + gtk_text_view_window_to_buffer_coords(GTK_TEXT_VIEW(widget), GTK_TEXT_WINDOW_TEXT, event->x, event->y, &x, &y); + gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(widget), &iter, x, y); + + GSList *tags = gtk_text_iter_get_tags(&iter); + gboolean is_link = FALSE; + for (GSList *l = tags; l; l = l->next) { + GtkTextTag *tag = (GtkTextTag*)l->data; + if (g_object_get_data(G_OBJECT(tag), "url")) { + is_link = TRUE; + break; + } + } + g_slist_free(tags); + + GdkCursor *cursor = is_link ? gdk_cursor_new(GDK_HAND2) : NULL; + gdk_window_set_cursor(gtk_text_view_get_window(GTK_TEXT_VIEW(widget), GTK_TEXT_WINDOW_TEXT), cursor); + if (cursor) gdk_cursor_unref(cursor); + + return FALSE; +} + +static gboolean on_viewer_event(GtkWidget *widget, GdkEvent *event, gpointer user_data) { + if (event->type == GDK_BUTTON_PRESS) { + GdkEventButton *bevent = (GdkEventButton *)event; + GtkTextIter iter; + int x, y; + gtk_text_view_window_to_buffer_coords(GTK_TEXT_VIEW(widget), GTK_TEXT_WINDOW_TEXT, bevent->x, bevent->y, &x, &y); + gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(widget), &iter, x, y); + + GSList *tags = gtk_text_iter_get_tags(&iter); + for (GSList *l = tags; l; l = l->next) { + GtkTextTag *tag = l->data; + char *url = g_object_get_data(G_OBJECT(tag), "url"); + if (url) { + char *cmd = g_strdup_printf("xdg-open '%s' &", url); + system(cmd); + g_free(cmd); + g_slist_free(tags); + return TRUE; + } + } + g_slist_free(tags); + } + return FALSE; +} + +void update_status_bar() { + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer_editor, &start, &end); + char *text = gtk_text_buffer_get_text(buffer_editor, &start, &end, FALSE); + + int chars = g_utf8_strlen(text, -1); + int words = 0; + int in_word = 0; + + for (char *p = text; *p; p = g_utf8_next_char(p)) { + gunichar c = g_utf8_get_char(p); + if (g_unichar_isspace(c)) { + in_word = 0; + } else if (!in_word) { + in_word = 1; + words++; + } + } + + char status_msg[256]; + const char *display_name = current_filename ? g_path_get_basename(current_filename) : "New File"; + snprintf(status_msg, sizeof(status_msg), "%s | Words: %d | Characters: %d", display_name, words, chars); + if (current_filename) g_free((char*)display_name); + + gtk_statusbar_pop(GTK_STATUSBAR(statusbar), status_context_id); + gtk_statusbar_push(GTK_STATUSBAR(statusbar), status_context_id, status_msg); + + g_free(text); +} + +static void on_find_next(GtkWidget *widget, gpointer data) { + const char *text = gtk_entry_get_text(GTK_ENTRY(find_entry)); + GtkTextIter start, match_start, match_end; + + gtk_text_buffer_get_iter_at_mark(buffer_editor, &start, gtk_text_buffer_get_insert(buffer_editor)); + + if (gtk_text_iter_forward_search(&start, text, GTK_TEXT_SEARCH_VISIBLE_ONLY, &match_start, &match_end, NULL)) { + gtk_text_buffer_select_range(buffer_editor, &match_start, &match_end); + gtk_text_view_scroll_to_iter(GTK_TEXT_VIEW(text_view_editor), &match_start, 0.0, FALSE, 0.0, 0.0); + } else { + // Wrap search + gtk_text_buffer_get_start_iter(buffer_editor, &start); + if (gtk_text_iter_forward_search(&start, text, GTK_TEXT_SEARCH_VISIBLE_ONLY, &match_start, &match_end, NULL)) { + gtk_text_buffer_select_range(buffer_editor, &match_start, &match_end); + gtk_text_view_scroll_to_iter(GTK_TEXT_VIEW(text_view_editor), &match_start, 0.0, FALSE, 0.0, 0.0); + } + } +} + +static void on_replace(GtkWidget *widget, gpointer data) { + GtkTextIter start, end; + if (gtk_text_buffer_get_selection_bounds(buffer_editor, &start, &end)) { + const char *replacement = gtk_entry_get_text(GTK_ENTRY(replace_entry)); + gtk_text_buffer_delete(buffer_editor, &start, &end); + gtk_text_buffer_insert(buffer_editor, &start, replacement, -1); + } + on_find_next(NULL, NULL); +} + +static void on_replace_all(GtkWidget *widget, gpointer data) { + const char *find_text = gtk_entry_get_text(GTK_ENTRY(find_entry)); + const char *rep_text = gtk_entry_get_text(GTK_ENTRY(replace_entry)); + GtkTextIter iter; + gtk_text_buffer_get_start_iter(buffer_editor, &iter); + + int count = 0; + GtkTextIter m_start, m_end; + while (gtk_text_iter_forward_search(&iter, find_text, GTK_TEXT_SEARCH_VISIBLE_ONLY, &m_start, &m_end, NULL)) { + gtk_text_buffer_delete(buffer_editor, &m_start, &m_end); + gtk_text_buffer_insert(buffer_editor, &m_start, rep_text, -1); + iter = m_start; + gtk_text_iter_forward_chars(&iter, strlen(rep_text)); + count++; + } +} + +static void on_find_activate(GtkMenuItem *item, gpointer user_data) { + if (find_dialog) { + gtk_window_present(GTK_WINDOW(find_dialog)); + return; + } + + find_dialog = gtk_window_new(GTK_WINDOW_TOPLEVEL); + gtk_window_set_title(GTK_WINDOW(find_dialog), "Find and Replace"); + gtk_window_set_transient_for(GTK_WINDOW(find_dialog), GTK_WINDOW(user_data)); + gtk_window_set_destroy_with_parent(GTK_WINDOW(find_dialog), TRUE); + g_signal_connect(find_dialog, "destroy", G_CALLBACK(gtk_widget_destroyed), &find_dialog); + + GtkWidget *vbox = gtk_vbox_new(FALSE, 5); + gtk_container_set_border_width(GTK_CONTAINER(vbox), 10); + gtk_container_add(GTK_CONTAINER(find_dialog), vbox); + + GtkWidget *table = gtk_table_new(2, 2, FALSE); + gtk_table_set_row_spacings(GTK_TABLE(table), 5); + gtk_table_set_col_spacings(GTK_TABLE(table), 5); + gtk_box_pack_start(GTK_BOX(vbox), table, FALSE, FALSE, 0); + + gtk_table_attach_defaults(GTK_TABLE(table), gtk_label_new("Find:"), 0, 1, 0, 1); + find_entry = gtk_entry_new(); + gtk_table_attach_defaults(GTK_TABLE(table), find_entry, 1, 2, 0, 1); + + gtk_table_attach_defaults(GTK_TABLE(table), gtk_label_new("Replace with:"), 0, 1, 1, 2); + replace_entry = gtk_entry_new(); + gtk_table_attach_defaults(GTK_TABLE(table), replace_entry, 1, 2, 1, 2); + + GtkWidget *bbox = gtk_hbutton_box_new(); + gtk_button_box_set_layout(GTK_BUTTON_BOX(bbox), GTK_BUTTONBOX_END); + gtk_box_pack_start(GTK_BOX(vbox), bbox, FALSE, FALSE, 0); + + GtkWidget *btn_find = gtk_button_new_with_label("Find Next"); + g_signal_connect(btn_find, "clicked", G_CALLBACK(on_find_next), NULL); + gtk_container_add(GTK_CONTAINER(bbox), btn_find); + + GtkWidget *btn_replace = gtk_button_new_with_label("Replace"); + g_signal_connect(btn_replace, "clicked", G_CALLBACK(on_replace), NULL); + gtk_container_add(GTK_CONTAINER(bbox), btn_replace); + + GtkWidget *btn_all = gtk_button_new_with_label("Replace All"); + g_signal_connect(btn_all, "clicked", G_CALLBACK(on_replace_all), NULL); + gtk_container_add(GTK_CONTAINER(bbox), btn_all); + + gtk_widget_show_all(find_dialog); +} + +void save_file(const char *filename); + +void update_line_numbers() { + int lines = gtk_text_buffer_get_line_count(buffer_editor); + GString *nums = g_string_new(""); + for (int i = 1; i <= lines; i++) { + g_string_append_printf(nums, "%d\n", i); + } + gtk_text_buffer_set_text(buffer_line_nums, nums->str, -1); + g_string_free(nums, TRUE); +} + +void update_preview() { + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer_editor, &start, &end); + char *text = gtk_text_buffer_get_text(buffer_editor, &start, &end, FALSE); + + // Highlight editor + md_render_highlight_editor(buffer_editor, dark_mode); + + // Render viewer + md_render_to_buffer(buffer_viewer, text, dark_mode); + + // Update Table of Contents + update_toc(); + + g_free(text); +} + +static void on_wrap_toggled(GtkCheckMenuItem *checkmenuitem, gpointer user_data) { + line_wrap = gtk_check_menu_item_get_active(checkmenuitem); + GtkWrapMode mode = line_wrap ? GTK_WRAP_WORD : GTK_WRAP_NONE; + gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(text_view_editor), mode); + gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(text_view_viewer), mode); +} + +static void on_dark_mode_toggled(GtkCheckMenuItem *checkmenuitem, gpointer user_data) { + dark_mode = gtk_check_menu_item_get_active(checkmenuitem); + update_ui_colors(); + update_preview(); +} + +static void on_toc_toggled(GtkCheckMenuItem *checkmenuitem, gpointer user_data) { + show_toc = gtk_check_menu_item_get_active(checkmenuitem); + if (show_toc) { + gtk_widget_show(toc_sidebar); + } else { + gtk_widget_hide(toc_sidebar); + } +} + +static void on_auto_save_toggled(GtkCheckMenuItem *checkmenuitem, gpointer user_data) { + auto_save_enabled = gtk_check_menu_item_get_active(checkmenuitem); +} + +static void insert_markdown_marker(const char *marker_start, const char *marker_end) { + GtkTextIter start, end; + if (gtk_text_buffer_get_selection_bounds(buffer_editor, &start, &end)) { + gtk_text_buffer_begin_user_action(buffer_editor); + gtk_text_buffer_insert(buffer_editor, &end, marker_end, -1); + gtk_text_buffer_insert(buffer_editor, &start, marker_start, -1); + gtk_text_buffer_end_user_action(buffer_editor); + } else { + gtk_text_buffer_insert_at_cursor(buffer_editor, marker_start, -1); + gtk_text_buffer_insert_at_cursor(buffer_editor, marker_end, -1); + GtkTextIter cursor; + gtk_text_buffer_get_iter_at_mark(buffer_editor, &cursor, gtk_text_buffer_get_insert(buffer_editor)); + gtk_text_iter_backward_chars(&cursor, strlen(marker_end)); + gtk_text_buffer_place_cursor(buffer_editor, &cursor); + } +} + +static void on_export_activate(GtkMenuItem *item, gpointer user_data) { + GtkWidget *dialog = gtk_file_chooser_dialog_new("Export to HTML", GTK_WINDOW(user_data), + GTK_FILE_CHOOSER_ACTION_SAVE, + GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, + GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT, NULL); + if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT) { + char *filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog)); + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer_editor, &start, &end); + char *text = gtk_text_buffer_get_text(buffer_editor, &start, &end, FALSE); + char *html = md_to_html(text); + g_file_set_contents(filename, html, -1, NULL); + g_free(text); + g_free(html); + g_free(filename); + } + gtk_widget_destroy(dialog); +} + +static void on_print_draw_page(GtkPrintOperation *operation, GtkPrintContext *context, int page_nr, gpointer user_data) { + cairo_t *cr = gtk_print_context_get_cairo_context(context); + PangoLayout *layout = gtk_print_context_create_pango_layout(context); + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer_viewer, &start, &end); + char *text = gtk_text_buffer_get_text(buffer_viewer, &start, &end, FALSE); + pango_layout_set_text(layout, text, -1); + pango_layout_set_width(layout, gtk_print_context_get_width(context) * PANGO_SCALE); + pango_cairo_show_layout(cr, layout); + g_free(text); + g_object_unref(layout); +} + +static void on_print_activate(GtkMenuItem *item, gpointer user_data) { + GtkPrintOperation *print = gtk_print_operation_new(); + gtk_print_operation_set_n_pages(print, 1); + g_signal_connect(print, "draw-page", G_CALLBACK(on_print_draw_page), NULL); + gtk_print_operation_run(print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, GTK_WINDOW(user_data), NULL); + g_object_unref(print); +} + +static gboolean debounce_cb(gpointer user_data) { + update_preview(); + GtkTextIter start; + gtk_text_buffer_get_start_iter(buffer_viewer, &start); + gtk_text_view_scroll_to_iter(GTK_TEXT_VIEW(text_view_viewer), &start, 0.0, TRUE, 0.0, 0.0); + debounce_id = 0; + return FALSE; +} + +static void on_new_activate(GtkMenuItem *item, gpointer user_data) { + g_signal_handlers_block_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + gtk_text_buffer_set_text(buffer_editor, "", 0); + g_signal_handlers_unblock_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + + if (current_filename) { + g_free(current_filename); + current_filename = NULL; + } + + g_list_free_full(undo_manager->undo_stack, g_free); + g_list_free_full(undo_manager->redo_stack, g_free); + undo_manager->undo_stack = NULL; + undo_manager->redo_stack = NULL; + undo_push(""); + + update_preview(); +} + +static void on_editor_changed(GtkTextBuffer *buffer, gpointer user_data) { + if (debounce_id) g_source_remove(debounce_id); + debounce_id = g_timeout_add(300, debounce_cb, NULL); + + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer, &start, &end); + char *text = gtk_text_buffer_get_text(buffer, &start, &end, FALSE); + undo_push(text); + g_free(text); + + update_status_bar(); + if (auto_save_enabled && current_filename) { + save_file(current_filename); + } +} + +void save_file(const char *filename) { + if (!filename) return; + + FILE *f = fopen(filename, "w"); + if (!f) { + perror("fopen"); + return; + } + + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer_editor, &start, &end); + char *text = gtk_text_buffer_get_text(buffer_editor, &start, &end, FALSE); + fputs(text, f); + g_free(text); + fclose(f); +} + +static void on_save_activate(GtkMenuItem *item, gpointer user_data) { + if (current_filename) { + save_file(current_filename); + } else { + GtkWidget *dialog; + dialog = gtk_file_chooser_dialog_new("Save File", + GTK_WINDOW(user_data), + GTK_FILE_CHOOSER_ACTION_SAVE, + GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, + GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT, + NULL); + gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE); + + if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT) { + char *filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog)); + save_file(filename); + if (current_filename) g_free(current_filename); + current_filename = g_strdup(filename); + g_free(filename); + add_recent_file(current_filename); + } + gtk_widget_destroy(dialog); + } +} + +static void on_open_activate(GtkMenuItem *item, gpointer user_data) { + GtkWidget *dialog; + dialog = gtk_file_chooser_dialog_new("Open File", + GTK_WINDOW(user_data), + GTK_FILE_CHOOSER_ACTION_OPEN, + GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, + GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, + NULL); + + if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT) { + char *filename; + filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog)); + load_file(filename); + g_free(filename); + } + gtk_widget_destroy(dialog); +} + +void load_file(const char *filename) { + FILE *f = fopen(filename, "r"); + if (!f) { + perror("fopen"); + return; + } + + fseek(f, 0, SEEK_END); + long size = ftell(f); + fseek(f, 0, SEEK_SET); + + char *content = malloc(size + 1); + fread(content, 1, size, f); + content[size] = '\0'; + fclose(f); + + if (current_filename) g_free(current_filename); + current_filename = g_strdup(filename); + add_recent_file(filename); + + g_signal_handlers_block_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + gtk_text_buffer_set_text(buffer_editor, content, -1); + g_signal_handlers_unblock_by_func(buffer_editor, G_CALLBACK(on_editor_changed), NULL); + + update_preview(); + update_line_numbers(); + update_status_bar(); + free(content); +} + +static void on_bold_shortcut() { insert_markdown_marker("**", "**"); } +static void on_italic_shortcut() { insert_markdown_marker("*", "*"); } +static void on_link_shortcut() { insert_markdown_marker("[", "](url)"); } +static void on_list_shortcut() { insert_markdown_marker("- ", ""); } +static void on_image_shortcut() { insert_markdown_marker("![Alt text](", ")"); } + +int main(int argc, char *argv[]) { + gtk_init(&argc, &argv); + load_config(); + + undo_manager = g_malloc0(sizeof(UndoManager)); + undo_manager->max_depth = 50; + + GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL); + gtk_window_set_title(GTK_WINDOW(window), "GTK2 Markdown Editor & Viewer"); + gtk_window_set_default_size(GTK_WINDOW(window), 1000, 700); + g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL); + + GtkAccelGroup *accel_group = gtk_accel_group_new(); + gtk_window_add_accel_group(GTK_WINDOW(window), accel_group); + + GtkWidget *vbox = gtk_vbox_new(FALSE, 0); + gtk_container_add(GTK_CONTAINER(window), vbox); + + // Menu + GtkWidget *menubar = gtk_menu_bar_new(); + + // File Menu + GtkWidget *file_menu_item = gtk_menu_item_new_with_label("File"); + GtkWidget *file_menu = gtk_menu_new(); + GtkWidget *new_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_NEW, NULL); + GtkWidget *open_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_OPEN, NULL); + GtkWidget *recent_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_OPEN, NULL); + gtk_menu_item_set_label(GTK_MENU_ITEM(recent_item), "Open Recent"); + recent_menu = gtk_menu_new(); + gtk_menu_item_set_submenu(GTK_MENU_ITEM(recent_item), recent_menu); + update_recent_menu(); + + GtkWidget *save_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_SAVE, NULL); + GtkWidget *export_item = gtk_menu_item_new_with_label("Export to HTML"); + GtkWidget *print_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_PRINT, NULL); + GtkWidget *auto_save_item = gtk_check_menu_item_new_with_label("Auto-Save"); + GtkWidget *sep = gtk_separator_menu_item_new(); + GtkWidget *quit_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_QUIT, NULL); + + gtk_menu_item_set_submenu(GTK_MENU_ITEM(file_menu_item), file_menu); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), new_item); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), open_item); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), recent_item); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), save_item); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), export_item); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), print_item); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), auto_save_item); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), sep); + gtk_menu_shell_append(GTK_MENU_SHELL(file_menu), quit_item); + gtk_menu_shell_append(GTK_MENU_SHELL(menubar), file_menu_item); + + // Edit Menu + GtkWidget *edit_menu_item = gtk_menu_item_new_with_label("Edit"); + GtkWidget *edit_menu = gtk_menu_new(); + GtkWidget *undo_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_UNDO, NULL); + GtkWidget *redo_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_REDO, NULL); + + gtk_menu_item_set_submenu(GTK_MENU_ITEM(edit_menu_item), edit_menu); + gtk_menu_shell_append(GTK_MENU_SHELL(edit_menu), undo_item); + gtk_menu_shell_append(GTK_MENU_SHELL(edit_menu), redo_item); + gtk_menu_shell_append(GTK_MENU_SHELL(edit_menu), gtk_separator_menu_item_new()); + + GtkWidget *find_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_FIND, NULL); + g_signal_connect(find_item, "activate", G_CALLBACK(on_find_activate), window); + gtk_menu_shell_append(GTK_MENU_SHELL(edit_menu), find_item); + + GtkWidget *rep_item = gtk_image_menu_item_new_from_stock(GTK_STOCK_FIND_AND_REPLACE, NULL); + g_signal_connect(rep_item, "activate", G_CALLBACK(on_find_activate), window); + gtk_menu_shell_append(GTK_MENU_SHELL(edit_menu), rep_item); + + gtk_menu_shell_append(GTK_MENU_SHELL(menubar), edit_menu_item); + + // View Menu + GtkWidget *view_menu_item = gtk_menu_item_new_with_label("View"); + GtkWidget *view_menu = gtk_menu_new(); + GtkWidget *wrap_item = gtk_check_menu_item_new_with_label("Line Wrap"); + GtkWidget *dark_item = gtk_check_menu_item_new_with_label("Dark Mode"); + GtkWidget *toc_toggle_item = gtk_check_menu_item_new_with_label("Show Table of Contents"); + + gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(wrap_item), line_wrap); + gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(dark_item), dark_mode); + gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(toc_toggle_item), show_toc); + gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(auto_save_item), auto_save_enabled); + + gtk_menu_item_set_submenu(GTK_MENU_ITEM(view_menu_item), view_menu); + gtk_menu_shell_append(GTK_MENU_SHELL(view_menu), wrap_item); + gtk_menu_shell_append(GTK_MENU_SHELL(view_menu), dark_item); + gtk_menu_shell_append(GTK_MENU_SHELL(view_menu), toc_toggle_item); + gtk_menu_shell_append(GTK_MENU_SHELL(menubar), view_menu_item); + + gtk_box_pack_start(GTK_BOX(vbox), menubar, FALSE, FALSE, 0); + + g_signal_connect(new_item, "activate", G_CALLBACK(on_new_activate), window); + g_signal_connect(open_item, "activate", G_CALLBACK(on_open_activate), window); + g_signal_connect(save_item, "activate", G_CALLBACK(on_save_activate), window); + g_signal_connect(export_item, "activate", G_CALLBACK(on_export_activate), window); + g_signal_connect(print_item, "activate", G_CALLBACK(on_print_activate), window); + g_signal_connect(auto_save_item, "activate", G_CALLBACK(on_auto_save_toggled), NULL); + g_signal_connect(quit_item, "activate", G_CALLBACK(gtk_main_quit), NULL); + + g_signal_connect(undo_item, "activate", G_CALLBACK(undo_perform), NULL); + g_signal_connect(redo_item, "activate", G_CALLBACK(redo_perform), NULL); + g_signal_connect(wrap_item, "toggled", G_CALLBACK(on_wrap_toggled), NULL); + g_signal_connect(dark_item, "toggled", G_CALLBACK(on_dark_mode_toggled), NULL); + g_signal_connect(toc_toggle_item, "toggled", G_CALLBACK(on_toc_toggled), NULL); + + // Shortcuts + GClosure *new_closure = g_cclosure_new(G_CALLBACK(on_new_activate), window, NULL); + gtk_accel_group_connect(accel_group, GDK_n, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, new_closure); + GClosure *bold_closure = g_cclosure_new(G_CALLBACK(on_bold_shortcut), NULL, NULL); + gtk_accel_group_connect(accel_group, GDK_b, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, bold_closure); + GClosure *italic_closure = g_cclosure_new(G_CALLBACK(on_italic_shortcut), NULL, NULL); + gtk_accel_group_connect(accel_group, GDK_i, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, italic_closure); + GClosure *link_closure = g_cclosure_new(G_CALLBACK(on_link_shortcut), NULL, NULL); + gtk_accel_group_connect(accel_group, GDK_k, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, link_closure); + + GClosure *undo_closure = g_cclosure_new(G_CALLBACK(undo_perform), NULL, NULL); + gtk_accel_group_connect(accel_group, GDK_z, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, undo_closure); + GClosure *redo_closure = g_cclosure_new(G_CALLBACK(redo_perform), NULL, NULL); + gtk_accel_group_connect(accel_group, GDK_y, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, redo_closure); + + GClosure *find_closure = g_cclosure_new(G_CALLBACK(on_find_activate), window, NULL); + gtk_accel_group_connect(accel_group, GDK_f, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, find_closure); + GClosure *rep_closure = g_cclosure_new(G_CALLBACK(on_find_activate), window, NULL); + gtk_accel_group_connect(accel_group, GDK_h, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE, rep_closure); + + // Outer Paned (ToC | Contents) + GtkWidget *outer_paned = gtk_hpaned_new(); + gtk_box_pack_start(GTK_BOX(vbox), outer_paned, TRUE, TRUE, 0); + + // ToC Sidebar (Left) + toc_sidebar = gtk_scrolled_window_new(NULL, NULL); + gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(toc_sidebar), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); + gtk_paned_add1(GTK_PANED(outer_paned), toc_sidebar); + + toc_store = gtk_list_store_new(NUM_COLS, G_TYPE_STRING, G_TYPE_INT); + GtkWidget *toc_list = gtk_tree_view_new_with_model(GTK_TREE_MODEL(toc_store)); + gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(toc_list), FALSE); + GtkCellRenderer *renderer = gtk_cell_renderer_text_new(); + GtkTreeViewColumn *column = gtk_tree_view_column_new_with_attributes("Header", renderer, "text", COL_TEXT, NULL); + gtk_tree_view_append_column(GTK_TREE_VIEW(toc_list), column); + gtk_container_add(GTK_CONTAINER(toc_sidebar), toc_list); + g_signal_connect(toc_list, "row-activated", G_CALLBACK(on_toc_row_activated), NULL); + + // Inner Paned (Editor | Viewer) + GtkWidget *inner_paned = gtk_hpaned_new(); + gtk_paned_add2(GTK_PANED(outer_paned), inner_paned); + + // Editor (Mid) + GtkWidget *sw_editor = gtk_scrolled_window_new(NULL, NULL); + gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw_editor), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); + gtk_paned_add1(GTK_PANED(inner_paned), sw_editor); + + GtkWidget *editor_hbox = gtk_hbox_new(FALSE, 0); + gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw_editor), editor_hbox); + + line_num_view = gtk_text_view_new(); + gtk_text_view_set_editable(GTK_TEXT_VIEW(line_num_view), FALSE); + gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(line_num_view), FALSE); + gtk_text_view_set_left_margin(GTK_TEXT_VIEW(line_num_view), 5); + gtk_text_view_set_right_margin(GTK_TEXT_VIEW(line_num_view), 5); + gtk_widget_set_sensitive(line_num_view, FALSE); + buffer_line_nums = gtk_text_view_get_buffer(GTK_TEXT_VIEW(line_num_view)); + gtk_box_pack_start(GTK_BOX(editor_hbox), line_num_view, FALSE, FALSE, 0); + + text_view_editor = gtk_text_view_new(); + gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(text_view_editor), line_wrap ? GTK_WRAP_WORD : GTK_WRAP_NONE); + gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text_view_editor), 10); + gtk_box_pack_start(GTK_BOX(editor_hbox), text_view_editor, TRUE, TRUE, 0); + buffer_editor = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_view_editor)); + g_signal_connect(buffer_editor, "changed", G_CALLBACK(on_editor_changed), NULL); + + // Viewer (Right) + GtkWidget *sw_viewer = gtk_scrolled_window_new(NULL, NULL); + gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw_viewer), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); + gtk_paned_add2(GTK_PANED(inner_paned), sw_viewer); + + text_view_viewer = gtk_text_view_new(); + gtk_text_view_set_editable(GTK_TEXT_VIEW(text_view_viewer), FALSE); + gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(text_view_viewer), FALSE); + gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(text_view_viewer), line_wrap ? GTK_WRAP_WORD : GTK_WRAP_NONE); + gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text_view_viewer), 20); + gtk_text_view_set_right_margin(GTK_TEXT_VIEW(text_view_viewer), 20); + gtk_container_add(GTK_CONTAINER(sw_viewer), text_view_viewer); + buffer_viewer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_view_viewer)); + gtk_widget_add_events(text_view_viewer, GDK_POINTER_MOTION_MASK); + g_signal_connect(text_view_viewer, "button-press-event", G_CALLBACK(on_viewer_event), NULL); + g_signal_connect(text_view_viewer, "motion-notify-event", G_CALLBACK(on_viewer_motion_notify), NULL); + + // Status Bar + statusbar = gtk_statusbar_new(); + gtk_box_pack_start(GTK_BOX(vbox), statusbar, FALSE, FALSE, 0); + status_context_id = gtk_statusbar_get_context_id(GTK_STATUSBAR(statusbar), "main"); + + // Initialize Markdown tags + md_render_init_tags(buffer_editor); + md_render_init_tags(buffer_viewer); + + update_ui_colors(); + gtk_paned_set_position(GTK_PANED(outer_paned), 200); + gtk_paned_set_position(GTK_PANED(inner_paned), 400); + + if (!show_toc) gtk_widget_hide(toc_sidebar); + + if (argc > 1) { + load_file(argv[1]); + } else { + gtk_text_buffer_set_text(buffer_editor, "# Welcome\n\nType here to see live preview on the right.", -1); + } + + GtkTextIter start, end; + gtk_text_buffer_get_bounds(buffer_editor, &start, &end); + char *initial_text = gtk_text_buffer_get_text(buffer_editor, &start, &end, FALSE); + undo_push(initial_text); + g_free(initial_text); + + gtk_widget_show_all(window); + if (!show_toc) gtk_widget_hide(toc_sidebar); + update_status_bar(); + gtk_main(); + + save_config(); + if (undo_manager) undo_free(); + if (current_filename) g_free(current_filename); + + return 0; +} |