help-browser: very basic, minimal implementation
This commit is contained in:
K. Lange
parent
ed26eeefcd
commit
2aff7e1f2e
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@ -19,6 +19,7 @@
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#include <toaru/decorations.h>
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#include <toaru/menu.h>
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#include <toaru/sdf.h>
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#include <toaru/markup.h>
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#define APPLICATION_TITLE "Help Browser"
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@ -31,6 +32,123 @@ static int application_running = 1;
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static gfx_context_t * contents = NULL;
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static sprite_t * contents_sprite = NULL;
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static char * current_topic = "This is the ToaruOS Help Browser. No help document is currently loaded.";
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/* Markup Renderer { */
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#define BASE_X 0
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#define BASE_Y 0
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#define LINE_HEIGHT 20
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static gfx_context_t * nctx = NULL;
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static int cursor_y = 0;
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static int cursor_x = 0;
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static list_t * state = NULL;
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static int current_state = 0;
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static int size = 16;
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struct Char {
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char c; /* TODO: unicode */
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char state;
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};
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//static list_t * lines = NULL;
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static list_t * buffer = NULL;
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static int state_to_font(int current_state) {
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if (current_state & (1 << 0)) {
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if (current_state & (1 << 1)) {
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return SDF_FONT_BOLD_OBLIQUE;
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}
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return SDF_FONT_BOLD;
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} else if (current_state & (1 << 1)) {
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return SDF_FONT_OBLIQUE;
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}
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return SDF_FONT_THIN;
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}
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static int buffer_width(list_t * buffer) {
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int out = 0;
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foreach(node, buffer) {
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struct Char * c = node->value;
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char tmp[2] = {c->c, '\0'};
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out += draw_sdf_string_width(tmp, size, state_to_font(c->state));
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}
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return out;
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}
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static int draw_buffer(list_t * buffer) {
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int x = 0;
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while (buffer->length) {
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node_t * node = list_dequeue(buffer);
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struct Char * c = node->value;
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char tmp[2] = { c->c, '\0' };
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x += draw_sdf_string(nctx, cursor_x + x, cursor_y, tmp, size, 0xFF000000, state_to_font(c->state));
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free(c);
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free(node);
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}
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x += 4;
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return x;
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}
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static void write_buffer(void) {
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if (buffer_width(buffer) + cursor_x > nctx->width) {
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cursor_x = BASE_X;
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cursor_y += LINE_HEIGHT;
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}
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cursor_x += draw_buffer(buffer);
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}
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static int parser_open(struct markup_state * self, void * user, struct markup_tag * tag) {
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if (!strcmp(tag->name, "b")) {
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list_insert(state, (void*)current_state);
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current_state |= (1 << 0);
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} else if (!strcmp(tag->name, "i")) {
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list_insert(state, (void*)current_state);
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current_state |= (1 << 1);
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} else if (!strcmp(tag->name, "br")) {
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write_buffer();
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cursor_x = BASE_X;
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cursor_y += LINE_HEIGHT;
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}
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markup_free_tag(tag);
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return 0;
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}
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static int parser_close(struct markup_state * self, void * user, char * tag_name) {
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if (!strcmp(tag_name, "b")) {
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node_t * nstate = list_pop(state);
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current_state = (int)nstate->value;
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free(nstate);
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} else if (!strcmp(tag_name, "i")) {
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node_t * nstate = list_pop(state);
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current_state = (int)nstate->value;
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free(nstate);
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}
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return 0;
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}
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static int parser_data(struct markup_state * self, void * user, char * data) {
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char * c = data;
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while (*c) {
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if (*c == ' ') {
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if (buffer->length) {
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write_buffer();
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}
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} else {
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struct Char * ch = malloc(sizeof(struct Char));
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ch->c = *c;
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ch->state = current_state;
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list_insert(buffer, ch);
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}
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c++;
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}
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return 0;
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}
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/* } End Markup Renderer */
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static struct menu_bar menu_bar = {0};
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static struct menu_bar_entries menu_entries[] = {
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{"File", "file"},
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@ -43,10 +161,6 @@ static void _menu_action_exit(struct MenuEntry * entry) {
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application_running = 0;
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}
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static void redraw_text(void) {
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draw_sdf_string(contents, 30, 30, "Hello, world.", 16, rgb(0,0,0), SDF_FONT_THIN);
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}
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static void reinitialize_contents(void) {
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if (contents) {
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free(contents);
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@ -67,8 +181,26 @@ static void reinitialize_contents(void) {
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draw_fill(contents, rgb(255,255,255));
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/* Draw file entries */
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redraw_text();
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nctx = contents;
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struct markup_state * parser = markup_init(NULL, parser_open, parser_close, parser_data);
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cursor_y = BASE_Y;
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cursor_x = BASE_X;
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state = list_create();
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buffer = list_create();
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char * str = current_topic;
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while (*str) {
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if (markup_parse(parser, *str++)) {
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fprintf(stderr,"There was an error.\n");
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return;
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}
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}
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markup_finish(parser);
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write_buffer();
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list_free(state);
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free(state);
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free(buffer);
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}
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static void redraw_window(void) {
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@ -111,10 +243,46 @@ static void resize_finish(int w, int h) {
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yutani_flip(yctx, main_window);
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}
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static void _menu_action_navigate(struct MenuEntry * entry) {
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/* go to entry->action */
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static void navigate(const char * t) {
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if (!strcmp(t,"file-browser.trt")) {
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current_topic =
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"<b>File Browser</b><br />"
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"The File Browser shows files. Double click to navigate through the file system.";
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} else if (!strcmp(t,"terminal.trt")) {
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current_topic =
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"<b>Terminal</b><br />"
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"It's a terminal emulator. Supports a large set of xterm escapes, plus 24-bit color.";
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} else if (!strcmp(t,"help_browser.trt")) {
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current_topic =
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"<b>Help Browser</b><br />"
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"A bit meta, reading about the Help Browser from within the Help Browser...<br />"
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"This is an incomplete port of the original Python Help Browser, which was, effectively "
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"a very bad web browser, built off of the expanding text label widget library.";
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} else if (!strcmp(t,"0_index.trt")) {
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current_topic =
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"<b>Welcome!</b><br />"
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"Welcome to ToaruOS. This Help Browser is still a bit experimental.";
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} else if (!strcmp(t,"special:contents")) {
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current_topic =
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"<i>A list of topics should go here, but, alas...</i>";
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} else {
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current_topic =
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"<i>No help document exists for this topic.</i>";
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}
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reinitialize_contents();
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redraw_window();
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}
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static void _menu_action_navigate(struct MenuEntry * entry) {
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/* go to entry->action */
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struct MenuEntry_Normal * _entry = (void*)entry;
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navigate(_entry->action);
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}
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#if 0
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static void _menu_action_back(struct MenuEntry * entry) {
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/* go back */
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}
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@ -122,6 +290,7 @@ static void _menu_action_back(struct MenuEntry * entry) {
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static void _menu_action_forward(struct MenuEntry * entry) {
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/* go forward */
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}
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#endif
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static void _menu_action_about(struct MenuEntry * entry) {
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/* Show About dialog */
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@ -156,9 +325,12 @@ int main(int argc, char * argv[]) {
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m = menu_create(); /* Go */
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menu_insert(m, menu_create_normal("home","0_index.trt","Home",_menu_action_navigate));
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menu_insert(m, menu_create_normal("bookmark","special:contents","Topics",_menu_action_navigate));
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#if 0
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/* TODO: History */
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menu_insert(m, menu_create_separator());
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menu_insert(m, menu_create_normal("back",NULL,"Back",_menu_action_back));
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menu_insert(m, menu_create_normal("forward",NULL,"Forward",_menu_action_forward));
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#endif
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menu_set_insert(menu_bar.set, "go", m);
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m = menu_create();
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@ -167,8 +339,12 @@ int main(int argc, char * argv[]) {
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menu_insert(m, menu_create_normal("star",NULL,"About " APPLICATION_TITLE,_menu_action_about));
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menu_set_insert(menu_bar.set, "help", m);
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reinitialize_contents();
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redraw_window();
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if (argc > 1) {
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navigate(argv[1]);
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} else {
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reinitialize_contents();
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redraw_window();
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}
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while (application_running) {
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yutani_msg_t * m = yutani_poll(yctx);
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