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- /* vim: tabstop=4 shiftwidth=4 noexpandtab
- * This file is part of ToaruOS and is released under the terms
- * of the NCSA / University of Illinois License - see LICENSE.md
- * Copyright (C) 2018 K. Lange
- *
- * help-browser - Display documentation.
- *
- * This is a work-in-progress reimplementation of the help browser
- * from mainline ToaruOS. It is currently incomplete.
- *
- * Eventually, this should be a rich text document browser, almost
- * akin to a web browser. Right now it just says "Hello, world."
- */
- #include <stdio.h>
- #include <unistd.h>
- #include <toaru/yutani.h>
- #include <toaru/graphics.h>
- #include <toaru/decorations.h>
- #include <toaru/menu.h>
- #include <toaru/sdf.h>
- #include <toaru/markup.h>
- #define APPLICATION_TITLE "Help Browser"
- static yutani_t * yctx;
- static yutani_window_t * main_window;
- static gfx_context_t * ctx;
- static int application_running = 1;
- static gfx_context_t * contents = NULL;
- static sprite_t * contents_sprite = NULL;
- static char * current_topic = "This is the ToaruOS Help Browser. No help document is currently loaded.";
- /* Markup Renderer { */
- #define BASE_X 0
- #define BASE_Y 0
- #define LINE_HEIGHT 20
- static gfx_context_t * nctx = NULL;
- static int cursor_y = 0;
- static int cursor_x = 0;
- static list_t * state = NULL;
- static int current_state = 0;
- static int size = 16;
- struct Char {
- char c; /* TODO: unicode */
- char state;
- };
- //static list_t * lines = NULL;
- static list_t * buffer = NULL;
- static int state_to_font(int current_state) {
- if (current_state & (1 << 0)) {
- if (current_state & (1 << 1)) {
- return SDF_FONT_BOLD_OBLIQUE;
- }
- return SDF_FONT_BOLD;
- } else if (current_state & (1 << 1)) {
- return SDF_FONT_OBLIQUE;
- }
- return SDF_FONT_THIN;
- }
- static int buffer_width(list_t * buffer) {
- int out = 0;
- foreach(node, buffer) {
- struct Char * c = node->value;
- char tmp[2] = {c->c, '\0'};
- out += draw_sdf_string_width(tmp, size, state_to_font(c->state));
- }
- return out;
- }
- static int draw_buffer(list_t * buffer) {
- int x = 0;
- while (buffer->length) {
- node_t * node = list_dequeue(buffer);
- struct Char * c = node->value;
- char tmp[2] = { c->c, '\0' };
- x += draw_sdf_string(nctx, cursor_x + x, cursor_y, tmp, size, 0xFF000000, state_to_font(c->state));
- free(c);
- free(node);
- }
- x += 4;
- return x;
- }
- static void write_buffer(void) {
- if (buffer_width(buffer) + cursor_x > nctx->width) {
- cursor_x = BASE_X;
- cursor_y += LINE_HEIGHT;
- }
- cursor_x += draw_buffer(buffer);
- }
- static int parser_open(struct markup_state * self, void * user, struct markup_tag * tag) {
- if (!strcmp(tag->name, "b")) {
- list_insert(state, (void*)current_state);
- current_state |= (1 << 0);
- } else if (!strcmp(tag->name, "i")) {
- list_insert(state, (void*)current_state);
- current_state |= (1 << 1);
- } else if (!strcmp(tag->name, "br")) {
- write_buffer();
- cursor_x = BASE_X;
- cursor_y += LINE_HEIGHT;
- }
- markup_free_tag(tag);
- return 0;
- }
- static int parser_close(struct markup_state * self, void * user, char * tag_name) {
- if (!strcmp(tag_name, "b")) {
- node_t * nstate = list_pop(state);
- current_state = (int)nstate->value;
- free(nstate);
- } else if (!strcmp(tag_name, "i")) {
- node_t * nstate = list_pop(state);
- current_state = (int)nstate->value;
- free(nstate);
- }
- return 0;
- }
- static int parser_data(struct markup_state * self, void * user, char * data) {
- char * c = data;
- while (*c) {
- if (*c == ' ') {
- if (buffer->length) {
- write_buffer();
- }
- } else {
- struct Char * ch = malloc(sizeof(struct Char));
- ch->c = *c;
- ch->state = current_state;
- list_insert(buffer, ch);
- }
- c++;
- }
- return 0;
- }
- /* } End Markup Renderer */
- static struct menu_bar menu_bar = {0};
- static struct menu_bar_entries menu_entries[] = {
- {"File", "file"},
- {"Go", "go"},
- {"Help", "help"},
- {NULL, NULL},
- };
- static void _menu_action_exit(struct MenuEntry * entry) {
- application_running = 0;
- }
- static void reinitialize_contents(void) {
- if (contents) {
- free(contents);
- }
- if (contents_sprite) {
- sprite_free(contents_sprite);
- }
- /* Calculate height for current directory */
- int calculated_height = 200;
- struct decor_bounds bounds;
- decor_get_bounds(main_window, &bounds);
- contents_sprite = create_sprite(main_window->width - bounds.width, calculated_height, ALPHA_EMBEDDED);
- contents = init_graphics_sprite(contents_sprite);
- draw_fill(contents, rgb(255,255,255));
- nctx = contents;
- struct markup_state * parser = markup_init(NULL, parser_open, parser_close, parser_data);
- cursor_y = BASE_Y;
- cursor_x = BASE_X;
- state = list_create();
- buffer = list_create();
- char * str = current_topic;
- while (*str) {
- if (markup_parse(parser, *str++)) {
- fprintf(stderr,"There was an error.\n");
- return;
- }
- }
- markup_finish(parser);
- write_buffer();
- list_free(state);
- free(state);
- free(buffer);
- }
- static void redraw_window(void) {
- draw_fill(ctx, rgb(255,255,255));
- render_decorations(main_window, ctx, APPLICATION_TITLE);
- struct decor_bounds bounds;
- decor_get_bounds(main_window, &bounds);
- menu_bar.x = bounds.left_width;
- menu_bar.y = bounds.top_height;
- menu_bar.width = ctx->width - bounds.width;
- menu_bar.window = main_window;
- menu_bar_render(&menu_bar, ctx);
- gfx_clear_clip(ctx);
- gfx_add_clip(ctx, bounds.left_width, bounds.top_height + MENU_BAR_HEIGHT, ctx->width - bounds.width, ctx->height - MENU_BAR_HEIGHT - bounds.height);
- draw_sprite(ctx, contents_sprite, bounds.left_width, bounds.top_height + MENU_BAR_HEIGHT);
- gfx_clear_clip(ctx);
- gfx_add_clip(ctx, 0, 0, ctx->width, ctx->height);
- flip(ctx);
- yutani_flip(yctx, main_window);
- }
- static void resize_finish(int w, int h) {
- int height_changed = (main_window->width != (unsigned int)w);
- yutani_window_resize_accept(yctx, main_window, w, h);
- reinit_graphics_yutani(ctx, main_window);
- if (height_changed) {
- reinitialize_contents();
- }
- redraw_window();
- yutani_window_resize_done(yctx, main_window);
- yutani_flip(yctx, main_window);
- }
- static void navigate(const char * t) {
- if (!strcmp(t,"file-browser.trt")) {
- current_topic =
- "<b>File Browser</b><br />"
- "The File Browser shows files. Double click to navigate through the file system.";
- } else if (!strcmp(t,"terminal.trt")) {
- current_topic =
- "<b>Terminal</b><br />"
- "It's a terminal emulator. Supports a large set of xterm escapes, plus 24-bit color.";
- } else if (!strcmp(t,"help_browser.trt")) {
- current_topic =
- "<b>Help Browser</b><br />"
- "A bit meta, reading about the Help Browser from within the Help Browser...<br />"
- "This is an incomplete port of the original Python Help Browser, which was, effectively "
- "a very bad web browser, built off of the expanding text label widget library.";
- } else if (!strcmp(t,"package-manager.trt")) {
- current_topic =
- "<b>Package Manager</b><br />"
- "Install additional third-party software through packages from the ToaruOS Package Repository. "
- "Packages can be installed by double-clicking. Dependencies will automatically be installed. "
- "At this time it is not possible to remove packages.";
- } else if (!strcmp(t,"0_index.trt")) {
- current_topic =
- "<b>Welcome!</b><br />"
- "Welcome to ToaruOS. This Help Browser is still a bit experimental.";
- } else if (!strcmp(t,"special:contents")) {
- current_topic =
- "<i>A list of topics should go here, but, alas...</i>";
- } else {
- current_topic =
- "<i>No help document exists for this topic.</i>";
- }
- reinitialize_contents();
- redraw_window();
- }
- static void _menu_action_navigate(struct MenuEntry * entry) {
- /* go to entry->action */
- struct MenuEntry_Normal * _entry = (void*)entry;
- navigate(_entry->action);
- }
- #if 0
- static void _menu_action_back(struct MenuEntry * entry) {
- /* go back */
- }
- static void _menu_action_forward(struct MenuEntry * entry) {
- /* go forward */
- }
- #endif
- static void _menu_action_about(struct MenuEntry * entry) {
- /* Show About dialog */
- char about_cmd[1024] = "\0";
- strcat(about_cmd, "about \"About Help Browser\" /usr/share/icons/48/help.bmp \"ToaruOS Help Browser\" \"(C) 2018 K. Lange\n-\nPart of ToaruOS, which is free software\nreleased under the NCSA/University of Illinois\nlicense.\n-\n%https://toaruos.org\n%https://github.com/klange/toaruos\" ");
- char coords[100];
- sprintf(coords, "%d %d &", (int)main_window->x + (int)main_window->width / 2, (int)main_window->y + (int)main_window->height / 2);
- strcat(about_cmd, coords);
- system(about_cmd);
- redraw_window();
- }
- int main(int argc, char * argv[]) {
- yctx = yutani_init();
- init_decorations();
- main_window = yutani_window_create(yctx, 640, 480);
- yutani_window_move(yctx, main_window, yctx->display_width / 2 - main_window->width / 2, yctx->display_height / 2 - main_window->height / 2);
- ctx = init_graphics_yutani_double_buffer(main_window);
- yutani_window_advertise_icon(yctx, main_window, APPLICATION_TITLE, "help");
- menu_bar.entries = menu_entries;
- menu_bar.redraw_callback = redraw_window;
- menu_bar.set = menu_set_create();
- struct MenuList * m = menu_create(); /* File */
- menu_insert(m, menu_create_normal("exit",NULL,"Exit", _menu_action_exit));
- menu_set_insert(menu_bar.set, "file", m);
- m = menu_create(); /* Go */
- menu_insert(m, menu_create_normal("home","0_index.trt","Home",_menu_action_navigate));
- menu_insert(m, menu_create_normal("bookmark","special:contents","Topics",_menu_action_navigate));
- #if 0
- /* TODO: History */
- menu_insert(m, menu_create_separator());
- menu_insert(m, menu_create_normal("back",NULL,"Back",_menu_action_back));
- menu_insert(m, menu_create_normal("forward",NULL,"Forward",_menu_action_forward));
- #endif
- menu_set_insert(menu_bar.set, "go", m);
- m = menu_create();
- menu_insert(m, menu_create_normal("help","help_browser.trt","Contents",_menu_action_navigate));
- menu_insert(m, menu_create_separator());
- menu_insert(m, menu_create_normal("star",NULL,"About " APPLICATION_TITLE,_menu_action_about));
- menu_set_insert(menu_bar.set, "help", m);
- if (argc > 1) {
- navigate(argv[1]);
- } else {
- reinitialize_contents();
- redraw_window();
- }
- while (application_running) {
- yutani_msg_t * m = yutani_poll(yctx);
- while (m) {
- if (menu_process_event(yctx, m)) {
- redraw_window();
- }
- switch (m->type) {
- case YUTANI_MSG_KEY_EVENT:
- {
- struct yutani_msg_key_event * ke = (void*)m->data;
- if (ke->event.action == KEY_ACTION_DOWN && ke->wid == main_window->wid) {
- switch (ke->event.keycode) {
- case 'f':
- if (ke->event.modifiers & YUTANI_KEY_MODIFIER_ALT) {
- menu_bar_show_menu(yctx,main_window,&menu_bar,-1,&menu_entries[0]);
- }
- break;
- case 'g':
- if (ke->event.modifiers & YUTANI_KEY_MODIFIER_ALT) {
- menu_bar_show_menu(yctx,main_window,&menu_bar,-1,&menu_entries[1]);
- }
- break;
- case 'h':
- if (ke->event.modifiers & YUTANI_KEY_MODIFIER_ALT) {
- menu_bar_show_menu(yctx,main_window,&menu_bar,-1,&menu_entries[2]);
- }
- break;
- case 'q':
- _menu_action_exit(NULL);
- break;
- }
- }
- }
- break;
- case YUTANI_MSG_WINDOW_FOCUS_CHANGE:
- {
- struct yutani_msg_window_focus_change * wf = (void*)m->data;
- yutani_window_t * win = hashmap_get(yctx->windows, (void*)wf->wid);
- if (win == main_window) {
- win->focused = wf->focused;
- redraw_window();
- }
- }
- break;
- case YUTANI_MSG_RESIZE_OFFER:
- {
- struct yutani_msg_window_resize * wr = (void*)m->data;
- if (wr->wid == main_window->wid) {
- resize_finish(wr->width, wr->height);
- }
- }
- break;
- case YUTANI_MSG_WINDOW_MOUSE_EVENT:
- {
- struct yutani_msg_window_mouse_event * me = (void*)m->data;
- yutani_window_t * win = hashmap_get(yctx->windows, (void*)me->wid);
- if (win == main_window) {
- int result = decor_handle_event(yctx, m);
- switch (result) {
- case DECOR_CLOSE:
- _menu_action_exit(NULL);
- break;
- case DECOR_RIGHT:
- /* right click in decoration, show appropriate menu */
- decor_show_default_menu(main_window, main_window->x + me->new_x, main_window->y + me->new_y);
- break;
- default:
- /* Other actions */
- break;
- }
- /* Menu bar */
- menu_bar_mouse_event(yctx, main_window, &menu_bar, me, me->new_x, me->new_y);
- }
- }
- break;
- case YUTANI_MSG_WINDOW_CLOSE:
- case YUTANI_MSG_SESSION_END:
- _menu_action_exit(NULL);
- break;
- default:
- break;
- }
- free(m);
- m = yutani_poll_async(yctx);
- }
- }
- }
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