mirror of
https://github.com/JannisHeydemann/BoredOS.git
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Porting of apps to userspace
This commit is contained in:
boreddevnl
441
src/kernel/userland/markdown.c
Normal file
441
src/kernel/userland/markdown.c
Normal file
@@ -0,0 +1,441 @@
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#include "libc/syscall.h"
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#include "libc/libui.h"
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#define MD_MAX_CONTENT 16384
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#define MD_MAX_LINES 256
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#define MD_CHAR_WIDTH 8
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#define MD_LINE_HEIGHT 16
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#define COLOR_DARK_PANEL 0xFF202020
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#define COLOR_DARK_BG 0xFF121212
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#define COLOR_DARK_TEXT 0xFFE0E0E0
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#define COLOR_DARK_TITLEBAR 0xFF303030
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#define COLOR_BLACK 0xFF000000
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typedef enum {
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MD_LINE_NORMAL,
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MD_LINE_HEADING1,
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MD_LINE_HEADING2,
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MD_LINE_HEADING3,
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MD_LINE_BOLD,
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MD_LINE_ITALIC,
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MD_LINE_LIST,
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MD_LINE_BLOCKQUOTE,
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MD_LINE_CODE
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} MDLineType;
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typedef struct {
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char content[256];
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int length;
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MDLineType type;
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int indent_level;
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} MDLine;
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static MDLine lines[MD_MAX_LINES];
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static int line_count = 0;
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static int scroll_top = 0;
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static char open_filename[256] = "";
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static int win_w = 600;
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static int win_h = 400;
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static size_t md_strlen(const char *str) {
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size_t len = 0;
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while (str[len]) len++;
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return len;
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}
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static void md_strcpy(char *dest, const char *src) {
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while (*src) *dest++ = *src++;
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*dest = 0;
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}
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static int md_strncpy(char *dest, const char *src, int n) {
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int i = 0;
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while (i < n && src[i]) {
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dest[i] = src[i];
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i++;
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}
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dest[i] = 0;
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return i;
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}
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static void md_parse_line(const char *raw_line, char *output, MDLineType *type, int *indent) {
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int i = 0;
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int out_idx = 0;
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*indent = 0;
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*type = MD_LINE_NORMAL;
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while (raw_line[i] == ' ' || raw_line[i] == '\t') {
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if (raw_line[i] == '\t') *indent += 2;
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else *indent += 1;
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i++;
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}
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if (raw_line[i] == '#') {
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int hash_count = 0;
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while (raw_line[i] == '#') {
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hash_count++;
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i++;
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}
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if (raw_line[i] == ' ') i++;
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if (hash_count == 1) *type = MD_LINE_HEADING1;
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else if (hash_count == 2) *type = MD_LINE_HEADING2;
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else if (hash_count <= 6) *type = MD_LINE_HEADING3;
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} else if (raw_line[i] == '-' || raw_line[i] == '*') {
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if ((raw_line[i] == '-' || raw_line[i] == '*') && (raw_line[i+1] == ' ' || raw_line[i+1] == '\t')) {
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*type = MD_LINE_LIST;
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i += 2;
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while (raw_line[i] == ' ' || raw_line[i] == '\t') i++;
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}
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} else if (raw_line[i] == '>') {
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*type = MD_LINE_BLOCKQUOTE;
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i++;
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if (raw_line[i] == ' ') i++;
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}
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while (raw_line[i] && out_idx < 255) {
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if (raw_line[i] == '*' && raw_line[i+1] == '*') {
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i += 2;
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while (raw_line[i] && !(raw_line[i] == '*' && raw_line[i+1] == '*') && out_idx < 255) {
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output[out_idx++] = raw_line[i++];
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}
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if (raw_line[i] == '*' && raw_line[i+1] == '*') i += 2;
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continue;
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}
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if ((raw_line[i] == '*' || raw_line[i] == '_') && out_idx > 0 && raw_line[i-1] != '\\') {
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char delim = raw_line[i];
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i++;
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while (raw_line[i] && raw_line[i] != delim && out_idx < 255) {
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output[out_idx++] = raw_line[i++];
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}
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if (raw_line[i] == delim) i++;
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continue;
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}
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if (raw_line[i] == '`') {
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i++;
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while (raw_line[i] && raw_line[i] != '`' && out_idx < 255) {
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output[out_idx++] = raw_line[i++];
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}
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if (raw_line[i] == '`') i++;
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continue;
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}
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if (raw_line[i] == '[') {
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i++;
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while (raw_line[i] && raw_line[i] != ']' && out_idx < 255) {
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output[out_idx++] = raw_line[i++];
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}
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if (raw_line[i] == ']') i++;
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if (raw_line[i] == '(') {
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while (raw_line[i] && raw_line[i] != ')') i++;
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if (raw_line[i] == ')') i++;
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}
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continue;
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}
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output[out_idx++] = raw_line[i++];
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}
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output[out_idx] = 0;
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}
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static void md_clear_all(void) {
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for (int i = 0; i < MD_MAX_LINES; i++) {
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lines[i].content[0] = 0;
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lines[i].length = 0;
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lines[i].type = MD_LINE_NORMAL;
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lines[i].indent_level = 0;
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}
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line_count = 0;
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scroll_top = 0;
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open_filename[0] = 0;
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}
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void markdown_open_file(const char *filename) {
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md_clear_all();
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md_strcpy(open_filename, filename);
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int fd = sys_open(filename, "r");
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if (fd < 0) return;
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static char buffer[MD_MAX_CONTENT];
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int bytes_read = sys_read(fd, buffer, sizeof(buffer) - 1);
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sys_close(fd);
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if (bytes_read <= 0) return;
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buffer[bytes_read] = 0;
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int line = 0;
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int col = 0;
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char raw_line[256] = "";
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bool in_code_block = false;
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for (int i = 0; i < bytes_read && line < MD_MAX_LINES; i++) {
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char ch = buffer[i];
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if (ch == '\n') {
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raw_line[col] = 0;
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if (raw_line[0] == '`' && raw_line[1] == '`' && raw_line[2] == '`') {
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in_code_block = !in_code_block;
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} else {
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if (in_code_block) {
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md_strcpy(lines[line].content, raw_line);
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lines[line].length = md_strlen(raw_line);
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lines[line].type = MD_LINE_CODE;
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lines[line].indent_level = 0;
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line++;
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} else {
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char parsed_content[256];
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MDLineType type;
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int indent;
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md_parse_line(raw_line, parsed_content, &type, &indent);
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md_strcpy(lines[line].content, parsed_content);
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lines[line].length = md_strlen(parsed_content);
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lines[line].type = type;
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lines[line].indent_level = indent;
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line++;
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}
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}
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col = 0;
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raw_line[0] = 0;
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} else if (col < 255) {
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raw_line[col++] = ch;
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}
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}
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if (col > 0 && line < MD_MAX_LINES) {
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raw_line[col] = 0;
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if (raw_line[0] == '`' && raw_line[1] == '`' && raw_line[2] == '`') {
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} else if (in_code_block) {
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md_strcpy(lines[line].content, raw_line);
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lines[line].length = md_strlen(raw_line);
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lines[line].type = MD_LINE_CODE;
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lines[line].indent_level = 0;
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line++;
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} else {
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char parsed_content[256];
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MDLineType type;
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int indent;
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md_parse_line(raw_line, parsed_content, &type, &indent);
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md_strcpy(lines[line].content, parsed_content);
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lines[line].length = md_strlen(parsed_content);
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lines[line].type = type;
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lines[line].indent_level = indent;
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line++;
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}
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}
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line_count = line;
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}
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static void md_draw_text_bold(ui_window_t win, int x, int y, const char *text, uint32_t color) {
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ui_draw_string(win, x, y, text, color);
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ui_draw_string(win, x + 1, y, text, color);
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}
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static void md_paint(ui_window_t win) {
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int offset_x = 4;
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int offset_y = 24;
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int content_width = win_w - 8;
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int content_height = win_h - 28;
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ui_draw_rounded_rect_filled(win, offset_x, offset_y, content_width, 20, 6, COLOR_DARK_PANEL);
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ui_draw_string(win, offset_x + 4, offset_y + 4, "File", COLOR_DARK_TEXT);
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ui_draw_string(win, offset_x + 50, offset_y + 4, open_filename, COLOR_DARK_TEXT);
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int btn_x_up = offset_x + content_width - 50;
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int btn_y = offset_y + 2;
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ui_draw_rounded_rect_filled(win, btn_x_up, btn_y, 20, 16, 4, COLOR_DARK_TITLEBAR);
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ui_draw_string(win, btn_x_up + 6, btn_y, "^", COLOR_DARK_TEXT);
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ui_draw_rounded_rect_filled(win, btn_x_up + 24, btn_y, 20, 16, 4, COLOR_DARK_TITLEBAR);
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ui_draw_string(win, btn_x_up + 30, btn_y, "v", COLOR_DARK_TEXT);
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int content_start_y = offset_y + 24;
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int content_start_x = offset_x + 4;
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int usable_content_width = content_width - 8 - 20;
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int usable_content_height = content_height - 28;
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int max_display_lines = usable_content_height / MD_LINE_HEIGHT;
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ui_draw_rounded_rect_filled(win, 4, content_start_y, win_w - 24, usable_content_height, 6, COLOR_DARK_BG);
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int display_line = 0;
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int i = scroll_top;
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while (i < line_count && display_line < max_display_lines) {
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MDLine *line = &lines[i];
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int line_height = MD_LINE_HEIGHT;
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int extra_spacing = 0;
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uint32_t text_color = COLOR_DARK_TEXT;
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bool use_bold = false;
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switch (line->type) {
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case MD_LINE_HEADING1:
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line_height = MD_LINE_HEIGHT * 2;
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text_color = 0xFF87CEEB;
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use_bold = true;
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extra_spacing = 4;
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break;
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case MD_LINE_HEADING2:
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line_height = MD_LINE_HEIGHT + 6;
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text_color = 0xFF4A90E2;
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use_bold = true;
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extra_spacing = 2;
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break;
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case MD_LINE_HEADING3:
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line_height = MD_LINE_HEIGHT + 2;
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text_color = 0xFF87CEEB;
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use_bold = false;
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break;
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case MD_LINE_BLOCKQUOTE:
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text_color = 0xFFA0A0A0;
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break;
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case MD_LINE_CODE:
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text_color = 0xFF90EE90;
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break;
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default:
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text_color = COLOR_DARK_TEXT;
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break;
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}
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if (display_line + (line_height / MD_LINE_HEIGHT) > max_display_lines) break;
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int x_offset = content_start_x + (line->indent_level * 4);
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int available_width = usable_content_width - (line->indent_level * 4);
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int max_chars_per_line = available_width / MD_CHAR_WIDTH;
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if (max_chars_per_line < 1) max_chars_per_line = 1;
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const char *text = line->content;
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int text_len = line->length;
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int char_idx = 0;
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int local_display_line = 0;
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int wrapped_line_count = 0;
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while (char_idx < text_len || (text_len == 0 && local_display_line == 0)) {
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int line_y = content_start_y + display_line * MD_LINE_HEIGHT + (local_display_line * MD_LINE_HEIGHT);
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char line_segment[256];
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int segment_len = 0;
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int segment_start = char_idx;
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while (char_idx < text_len && segment_len < max_chars_per_line) {
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line_segment[segment_len++] = text[char_idx++];
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}
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line_segment[segment_len] = 0;
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if (char_idx < text_len && segment_len > 0) {
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int last_space = -1;
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for (int j = segment_len - 1; j >= 0; j--) {
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if (line_segment[j] == ' ') {
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last_space = j; break;
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}
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}
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if (last_space > 0) {
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segment_len = last_space;
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line_segment[segment_len] = 0;
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char_idx = segment_start + last_space + 1;
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while (char_idx < text_len && text[char_idx] == ' ') char_idx++;
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}
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}
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if (line->type == MD_LINE_CODE && segment_len > 0) {
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ui_draw_rect(win, x_offset - 2, line_y - 2, (segment_len * MD_CHAR_WIDTH) + 4, 12, COLOR_BLACK);
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}
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if (local_display_line == 0) {
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switch (line->type) {
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case MD_LINE_LIST:
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ui_draw_rect(win, x_offset, line_y + MD_LINE_HEIGHT/2 - 1, 2, 2, COLOR_BLACK);
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x_offset += 12;
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if (segment_len > 0 && line_segment[0] == ' ') {
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for (int j = 0; j < segment_len - 1; j++) line_segment[j] = line_segment[j + 1];
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segment_len--;
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}
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||||
break;
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case MD_LINE_BLOCKQUOTE:
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ui_draw_rect(win, x_offset - 4, line_y, 2, line_height, 0xFF404080);
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break;
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default: break;
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}
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}
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||||
if (segment_len > 0) {
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if (use_bold) {
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md_draw_text_bold(win, x_offset, line_y + extra_spacing, line_segment, text_color);
|
||||
} else {
|
||||
ui_draw_string(win, x_offset, line_y, line_segment, text_color);
|
||||
}
|
||||
}
|
||||
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||||
local_display_line++;
|
||||
wrapped_line_count++;
|
||||
if (char_idx >= text_len) break;
|
||||
}
|
||||
|
||||
display_line += (wrapped_line_count > 0 ? wrapped_line_count : 1);
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
static void md_handle_key(char c) {
|
||||
if (c == 'w' || c == 'W' || c == 17) {
|
||||
scroll_top -= 3;
|
||||
if (scroll_top < 0) scroll_top = 0;
|
||||
} else if (c == 's' || c == 'S' || c == 18) {
|
||||
scroll_top += 3;
|
||||
int max_scroll = line_count - 10;
|
||||
if (scroll_top > max_scroll) scroll_top = max_scroll;
|
||||
if (scroll_top < 0) scroll_top = 0;
|
||||
}
|
||||
}
|
||||
|
||||
static void md_handle_click(int x, int y) {
|
||||
int content_width = win_w - 8;
|
||||
int btn_x_up = 4 + content_width - 50;
|
||||
int btn_y = 24 + 2;
|
||||
if (x >= btn_x_up && x < btn_x_up + 20 && y >= btn_y && y < btn_y + 16) {
|
||||
scroll_top -= 3;
|
||||
if (scroll_top < 0) scroll_top = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
int btn_x_down_top = 4 + content_width - 50 + 24;
|
||||
if (x >= btn_x_down_top && x < btn_x_down_top + 20 && y >= btn_y && y < btn_y + 16) {
|
||||
scroll_top += 3;
|
||||
int max_scroll = line_count - 10;
|
||||
if (scroll_top > max_scroll) scroll_top = max_scroll;
|
||||
if (scroll_top < 0) scroll_top = 0;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
ui_window_t win = ui_window_create("Markdown Viewer", 150, 180, win_w, win_h);
|
||||
if (!win) return 1;
|
||||
|
||||
md_clear_all();
|
||||
if (argc > 1) {
|
||||
markdown_open_file(argv[1]);
|
||||
}
|
||||
|
||||
gui_event_t ev;
|
||||
while (1) {
|
||||
if (ui_get_event(win, &ev)) {
|
||||
if (ev.type == GUI_EVENT_PAINT) {
|
||||
md_paint(win);
|
||||
ui_mark_dirty(win, 0, 0, win_w, win_h);
|
||||
} else if (ev.type == GUI_EVENT_CLICK) {
|
||||
md_handle_click(ev.arg1, ev.arg2);
|
||||
md_paint(win);
|
||||
ui_mark_dirty(win, 0, 0, win_w, win_h);
|
||||
} else if (ev.type == GUI_EVENT_KEY) {
|
||||
md_handle_key((char)ev.arg1);
|
||||
md_paint(win);
|
||||
ui_mark_dirty(win, 0, 0, win_w, win_h);
|
||||
} else if (ev.type == GUI_EVENT_CLOSE) {
|
||||
sys_exit(0);
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user