help-browser: viably display the AGPL text for the mupdf package
This commit is contained in:
K. Lange
parent
e47468d580
commit
55c0ccd36c
@ -13,6 +13,7 @@
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <toaru/yutani.h>
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#include <toaru/graphics.h>
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@ -32,16 +33,17 @@ 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 int contents_width = 0;
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static char * current_topic = NULL;
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static int scroll_offset;
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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 BASE_X 2
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#define BASE_Y 2
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#define LINE_HEIGHT 20
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#define HEAD_HEIGHT 28
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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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@ -51,6 +53,7 @@ static struct TT_Font * tt_font_thin = NULL;
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static struct TT_Font * tt_font_bold = NULL;
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static struct TT_Font * tt_font_oblique = NULL;
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static struct TT_Font * tt_font_bold_oblique = NULL;
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static struct TT_Font * tt_font_mono = NULL;
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struct Char {
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char c; /* TODO: unicode */
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@ -61,7 +64,10 @@ struct Char {
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static list_t * buffer = NULL;
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static struct TT_Font * state_to_font(int current_state) {
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if (current_state & (1 << 0)) {
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if (current_state & (1 << 3)) {
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return tt_font_mono;
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}
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if (current_state & (1 << 0 | 1 << 2) ) {
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if (current_state & (1 << 1)) {
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return tt_font_bold_oblique;
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}
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@ -99,7 +105,11 @@ static int draw_buffer(list_t * buffer) {
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struct Char * c = node->value;
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char tmp[2] = { c->c, '\0' };
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tt_set_size(state_to_font(c->state), current_size());
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x += tt_draw_string(nctx, state_to_font(c->state), cursor_x + x, cursor_y + current_size(), tmp, 0xFF000000);
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if (contents) {
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x += tt_draw_string(contents, state_to_font(c->state), cursor_x + x, cursor_y + current_size(), tmp, 0xFF000000);
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} else {
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x += tt_string_width(state_to_font(c->state), tmp);
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}
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free(c);
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free(node);
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}
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@ -116,7 +126,7 @@ static int current_line_height(void) {
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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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if (buffer_width(buffer) + cursor_x > contents_width) {
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cursor_x = BASE_X;
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cursor_y += current_line_height();
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}
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@ -137,6 +147,12 @@ static int parser_open(struct markup_state * self, void * user, struct markup_ta
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write_buffer();
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cursor_x = BASE_X;
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cursor_y += current_line_height();
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} else if (!strcmp(tag->name, "mono")) {
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write_buffer();
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cursor_x = BASE_X;
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cursor_y += current_line_height();
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list_insert(state, (void*)(uintptr_t)current_state);
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current_state |= (1 << 3);
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}
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markup_free_tag(tag);
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return 0;
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@ -151,6 +167,13 @@ static int parser_close(struct markup_state * self, void * user, char * tag_name
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node_t * nstate = list_pop(state);
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current_state = (int)(uintptr_t)nstate->value;
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free(nstate);
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} else if (!strcmp(tag_name, "mono")) {
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write_buffer();
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cursor_x = BASE_X;
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cursor_y += current_line_height();
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node_t * nstate = list_pop(state);
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current_state = (int)(uintptr_t)nstate->value;
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free(nstate);
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} else if (!strcmp(tag_name, "h1")) {
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write_buffer();
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cursor_x = BASE_X;
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@ -165,13 +188,31 @@ static int parser_close(struct markup_state * self, void * user, char * tag_name
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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 == ' ' || *c == '\n') {
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if (*c == ' ' && !(current_state & (1 << 3))) {
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if (buffer->length) {
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write_buffer();
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}
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} else if (*c == '\n') {
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if (buffer->length) {
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write_buffer();
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}
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if (current_state & (1 << 3)) {
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cursor_x = BASE_X;
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cursor_y += current_line_height();
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}
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} else {
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int chr = *c;
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if (*c == '&') {
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if (c[1] == 'l' && c[2] == 't' && c[3] == ';') {
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c += 3;
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chr = '<';
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} else if (c[1] == 'g' && c[2] == 't' && c[3] == ';') {
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c += 3;
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chr = '>';
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}
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}
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struct Char * ch = malloc(sizeof(struct Char));
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ch->c = *c;
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ch->c = chr;
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ch->state = current_state;
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list_insert(buffer, ch);
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}
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@ -203,37 +244,59 @@ static void reinitialize_contents(void) {
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sprite_free(contents_sprite);
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}
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/* Calculate height for current directory */
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int calculated_height = 200;
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struct decor_bounds bounds;
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decor_get_bounds(main_window, &bounds);
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contents = NULL;
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contents_width = main_window->width - bounds.width;
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contents_sprite = create_sprite(main_window->width - bounds.width, calculated_height, ALPHA_EMBEDDED);
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{
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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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contents_sprite = create_sprite(contents_width, cursor_y + current_size() + 20, ALPHA_EMBEDDED);
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contents = init_graphics_sprite(contents_sprite);
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draw_fill(contents, rgb(255,255,255));
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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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{
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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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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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}
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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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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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}
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static void redraw_window(void) {
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@ -252,7 +315,7 @@ static void redraw_window(void) {
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gfx_clear_clip(ctx);
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gfx_add_clip(ctx, bounds.left_width, bounds.top_height + MENU_BAR_HEIGHT, ctx->width - bounds.width, ctx->height - MENU_BAR_HEIGHT - bounds.height);
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draw_sprite(ctx, contents_sprite, bounds.left_width, bounds.top_height + MENU_BAR_HEIGHT);
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draw_sprite(ctx, contents_sprite, bounds.left_width, bounds.top_height + MENU_BAR_HEIGHT - scroll_offset);
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gfx_clear_clip(ctx);
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gfx_add_clip(ctx, 0, 0, ctx->width, ctx->height);
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@ -276,32 +339,88 @@ 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 char * generate_index(void) {
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list_t * components = list_create();
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list_insert(components, strdup("<h1>Topics</h1>\n"));
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/* Open /usr/share/help */
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DIR * dirp = opendir("/usr/share/help");
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if (dirp) {
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for (struct dirent * ent = readdir(dirp); ent; ent = readdir(dirp)) {
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if (ent->d_name[0] == '.') continue;
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/* TODO: Extract the actual heading... */
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char tmp[1024];
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snprintf(tmp, 1024, " » %s<br>\n", ent->d_name);
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list_insert(components, strdup(tmp));
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}
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closedir(dirp);
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}
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size_t totalSize = 0;
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foreach(node, components) {
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char * s = node->value;
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totalSize += strlen(s);
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}
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char * out = malloc(totalSize + 1);
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char * ptr = out;
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foreach(node, components) {
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char * s = node->value;
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size_t len = strlen(s);
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memcpy(ptr, s, len);
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ptr += len;
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free(s);
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}
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*ptr = '\0';
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list_free(components);
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return out;
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}
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static void navigate(const char * t) {
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if (current_topic) free(current_topic);
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char file_path[1024];
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/* Is this a special file? */
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if (strstr(t, "special:") == t) {
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const char * pageName = t + 8;
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if (!strcmp(pageName, "contents")) {
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/* Oh boy... */
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current_topic = generate_index();
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} else {
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current_topic = strdup("File not found.");
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}
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if (t[0] == '/') {
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sprintf(file_path, "%s", t);
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} else {
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sprintf(file_path, "%s/%s", HELP_DIR, t);
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}
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char file_path[1024];
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FILE * f = fopen(file_path, "r");
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if (t[0] == '/') {
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sprintf(file_path, "%s", t);
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} else {
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sprintf(file_path, "%s/%s", HELP_DIR, t);
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}
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if (!f) {
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current_topic = strdup("File not found.");
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} else {
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fseek(f, 0, SEEK_END);
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size_t size = ftell(f);
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fseek(f, 0, SEEK_SET);
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FILE * f = fopen(file_path, "r");
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current_topic = malloc(size+1);
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fread(current_topic, 1, size, f);
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current_topic[size] = '\0';
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if (!f) {
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current_topic = strdup("File not found.");
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} else {
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fseek(f, 0, SEEK_END);
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size_t size = ftell(f);
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fseek(f, 0, SEEK_SET);
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fclose(f);
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current_topic = malloc(size+1);
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fread(current_topic, 1, size, f);
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current_topic[size] = '\0';
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fclose(f);
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}
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}
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reinitialize_contents();
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@ -309,6 +428,30 @@ static void navigate(const char * t) {
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}
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#define SCROLL_AMOUNT 120
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static void _scroll_up(void) {
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scroll_offset -= SCROLL_AMOUNT;
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if (scroll_offset < 0) {
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scroll_offset = 0;
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}
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}
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static void _scroll_down(void) {
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struct decor_bounds bounds;
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decor_get_bounds(main_window, &bounds);
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int available_height = main_window->height - bounds.height - MENU_BAR_HEIGHT;
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if (available_height > contents->height) {
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scroll_offset = 0;
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} else {
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scroll_offset += SCROLL_AMOUNT;
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if (scroll_offset > contents->height - available_height) {
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scroll_offset = contents->height - available_height;
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}
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}
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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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@ -328,7 +471,7 @@ static void _menu_action_forward(struct MenuEntry * entry) {
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static void _menu_action_about(struct MenuEntry * entry) {
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/* Show About dialog */
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char about_cmd[1024] = "\0";
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strcat(about_cmd, "about \"About Help Browser\" /usr/share/icons/48/help.png \"ToaruOS Help Browser\" \"(C) 2018-2020 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\" ");
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strcat(about_cmd, "about \"About Help Browser\" /usr/share/icons/48/help.png \"ToaruOS Help Browser\" \"© 2018-2020 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\" ");
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char coords[100];
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sprintf(coords, "%d %d &", (int)main_window->x + (int)main_window->width / 2, (int)main_window->y + (int)main_window->height / 2);
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strcat(about_cmd, coords);
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@ -353,6 +496,7 @@ int main(int argc, char * argv[]) {
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tt_font_bold = tt_font_from_shm("sans-serif.bold");
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tt_font_oblique = tt_font_from_shm("sans-serif.italic");
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tt_font_bold_oblique = tt_font_from_shm("sans-serif.bolditalic");
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tt_font_mono = tt_font_from_shm("monospace");
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yutani_window_advertise_icon(yctx, main_window, APPLICATION_TITLE, "help");
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@ -462,6 +606,22 @@ int main(int argc, char * argv[]) {
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/* Menu bar */
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menu_bar_mouse_event(yctx, main_window, &menu_bar, me, me->new_x, me->new_y);
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struct decor_bounds bounds;
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decor_get_bounds(main_window, &bounds);
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if (me->new_x >= 0 && me->new_x <= (int)main_window->width &&
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me->new_y > bounds.top_height + MENU_BAR_HEIGHT &&
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me->new_y < (int)main_window->height) {
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if (me->buttons & YUTANI_MOUSE_SCROLL_UP) {
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/* Scroll up */
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_scroll_up();
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redraw_window();
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} else if (me->buttons & YUTANI_MOUSE_SCROLL_DOWN) {
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_scroll_down();
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redraw_window();
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}
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}
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}
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}
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break;
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