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boredos_mirror/src/kernel/userland/browser.c
boreddevnl 36219f5828 browser parsing
2026-03-03 14:12:39 +01:00

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// Copyright (c) 2023-2026 Chris (boreddevnl)
// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
#include "libc/syscall.h"
#include "libc/libui.h"
#include "nanojpeg.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#define WIN_W 1280
#define WIN_H 960
#define URL_BAR_H 30
#define SCROLL_BAR_W 16
#define RESP_BUF_SIZE (1024 * 1024)
#define COLOR_URL_BAR 0xFF303030
#define COLOR_URL_TEXT 0xFFF0F0F0
#define COLOR_BG 0xFFFFFFFF
#define COLOR_TEXT 0xFF000000
#define COLOR_LINK 0xFF0000EE
#define COLOR_SCROLL_BG 0xFFEEEEEE
#define COLOR_SCROLL_BTN 0xFFCCCCCC
static char* strstr(const char* haystack, const char* needle) {
if (!*needle) return (char*)haystack;
for (; *haystack; haystack++) {
const char *h = haystack;
const char *n = needle;
while (*h && *n && *h == *n) {
h++; n++;
}
if (!*n) return (char*)haystack;
}
return NULL;
}
static char* str_istrstr(const char* haystack, const char* needle) {
if (!*needle) return (char*)haystack;
for (; *haystack; haystack++) {
const char *h = haystack;
const char *n = needle;
while (*h && *n) {
char ch = *h; char cn = *n;
if (ch >= 'A' && ch <= 'Z') ch += 32;
if (cn >= 'A' && cn <= 'Z') cn += 32;
if (ch != cn) break;
h++; n++;
}
if (!*n) return (char*)haystack;
}
return NULL;
}
static long strtol(const char* nptr, char** endptr, int base) {
long res = 0;
while (*nptr == ' ' || *nptr == '\t' || *nptr == '\n' || *nptr == '\r') nptr++;
bool neg = false;
if (*nptr == '-') { neg = true; nptr++; }
else if (*nptr == '+') nptr++;
while (*nptr) {
int v = -1;
if (*nptr >= '0' && *nptr <= '9') v = *nptr - '0';
else if (*nptr >= 'a' && *nptr <= 'z') v = *nptr - 'a' + 10;
else if (*nptr >= 'A' && *nptr <= 'Z') v = *nptr - 'A' + 10;
if (v < 0 || v >= base) break;
res = res * base + v;
nptr++;
}
if (endptr) *endptr = (char*)nptr;
return neg ? -res : res;
}
typedef enum { TAG_NONE, TAG_IMG, TAG_INPUT, TAG_BUTTON } HTMLTag;
typedef struct {
char content[1024];
int x, y, w, h;
HTMLTag tag;
char link_url[256];
char attr_value[256];
uint32_t color;
bool centered;
bool bold;
uint32_t *img_pixels;
int img_w, img_h;
char form_action[256];
char input_name[64];
int form_id;
} RenderElement;
#define MAX_ELEMENTS 8192
static RenderElement elements[MAX_ELEMENTS];
static int element_count = 0;
static char url_input_buffer[512] = "http://frogfind.com";
static int url_cursor = 19;
static char current_host[256] = "frogfind.com";
static int current_port = 80;
static int next_form_id = 1;
static ui_window_t win_browser;
static int scroll_y = 0;
static int total_content_height = 0;
static int focused_element = -1; // -1 for URL bar, >= 0 for page elements
static void browser_clear(void) {
for (int i = 0; i < element_count; i++) {
if (elements[i].img_pixels) free(elements[i].img_pixels);
}
element_count = 0;
total_content_height = 0;
}
static bool str_istarts_with(const char *str, const char *prefix) {
while (*prefix) {
char s = *str; char p = *prefix;
if (s >= 'A' && s <= 'Z') s += 32;
if (p >= 'A' && p <= 'Z') p += 32;
if (s != p) return false;
str++; prefix++;
}
return true;
}
static int parse_ip(const char* str, net_ipv4_address_t* ip) {
int val = 0;
int part = 0;
const char* p = str;
while (*p) {
if (*p >= '0' && *p <= '9') {
val = val * 10 + (*p - '0');
if (val > 255) return -1;
} else if (*p == '.') {
if (part > 3) return -1;
ip->bytes[part++] = (uint8_t)val;
val = 0;
} else {
return -1;
}
p++;
}
if (part != 3) return -1;
ip->bytes[3] = (uint8_t)val;
return 0;
}
static int fetch_content(const char *url, char *dest_buf, int max_len) {
const char* host_start = url;
if (url[0] == 'h' && url[1] == 't' && url[2] == 't' && url[3] == 'p') {
if (url[4] == 's' && url[5] == ':') host_start = url + 8;
else if (url[4] == ':') host_start = url + 7;
}
char hostname[256];
int port = 80;
int i = 0;
while (host_start[i] && host_start[i] != '/' && host_start[i] != ':' && i < 255) {
hostname[i] = host_start[i];
i++;
}
hostname[i] = 0;
if (host_start[i] == ':') {
i++;
char port_str[10];
int j = 0;
while (host_start[i] && host_start[i] != '/' && j < 9) {
port_str[j++] = host_start[i++];
}
port_str[j] = 0;
port = atoi(port_str);
}
current_port = port;
if (hostname[0]) {
int k=0; while(hostname[k]) { current_host[k] = hostname[k]; k++; } current_host[k] = 0;
}
net_ipv4_address_t ip;
if (parse_ip(hostname, &ip) != 0) {
if (sys_dns_lookup(hostname, &ip) != 0) return 0;
}
if (sys_tcp_connect(&ip, port) != 0) return 0;
const char* path = host_start + i;
if (*path == 0) path = "/";
char request[2048];
char* r = request;
const char* s;
s = "GET "; while(*s) *r++ = *s++;
s = path; while(*s) *r++ = *s++;
s = " HTTP/1.1\r\nHost: "; while(*s) *r++ = *s++;
s = hostname; while(*s) *r++ = *s++;
if (current_port != 80) {
*r++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
s = pbuf; while(*s) *r++ = *s++;
}
s = "\r\nUser-Agent: BoredOS/1.0\r\nAccept: */*\r\nConnection: close\r\n\r\n"; while(*s) *r++ = *s++;
sys_tcp_send(request, r - request);
int total = 0;
while (1) {
int len = sys_tcp_recv(dest_buf + total, max_len - 1 - total);
if (len <= 0) break;
total += len;
if (total >= max_len - 1) break;
}
dest_buf[total] = 0;
sys_tcp_close();
return total;
}
static void decode_jpeg(unsigned char *data, int len, RenderElement *el) {
njInit();
if (njDecode(data, len) == NJ_OK) {
int w = njGetWidth(); int h = njGetHeight();
unsigned char *rgb = njGetImage();
if (rgb) {
int fit_w = w; int fit_h = h;
if (fit_w > WIN_W - 60) { fit_h = fit_h * (WIN_W - 60) / fit_w; fit_w = WIN_W - 60; }
if (fit_h > 400) { fit_w = fit_w * 400 / fit_h; fit_h = 400; }
el->img_pixels = malloc(fit_w * fit_h * sizeof(uint32_t));
if (el->img_pixels) {
for (int y = 0; y < fit_h; y++) {
int sy = y * h / fit_h;
for (int x = 0; x < fit_w; x++) {
int sx = x * w / fit_w;
int idx = (sy * w + sx) * 3;
el->img_pixels[y * fit_w + x] = 0xFF000000 | (rgb[idx] << 16) | (rgb[idx+1] << 8) | rgb[idx+2];
}
}
el->img_w = fit_w; el->img_h = fit_h;
}
}
}
njDone();
}
static int decode_chunked_bin(char *body, int total_len) {
char *src = body; char *dst = body;
int remaining = total_len;
int final_len = 0;
while (remaining > 0) {
char *endptr;
int chunk_size = (int)strtol(src, &endptr, 16);
int head_len = endptr - src;
src = endptr;
if (*src == '\r') { src++; head_len++; }
if (*src == '\n') { src++; head_len++; }
remaining -= head_len;
if (chunk_size == 0) break;
if (remaining < chunk_size) chunk_size = remaining;
for (int i = 0; i < chunk_size; i++) *dst++ = *src++;
final_len += chunk_size;
remaining -= chunk_size;
if (remaining > 0 && *src == '\r') { src++; remaining--; }
if (remaining > 0 && *src == '\n') { src++; remaining--; }
}
*dst = 0;
return final_len;
}
static void load_image(RenderElement *el) {
char url[512];
if (str_istarts_with(el->attr_value, "http")) {
int k=0; while(el->attr_value[k]) { url[k] = el->attr_value[k]; k++; } url[k] = 0;
} else {
char *u = url;
const char *s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++;
if (el->attr_value[0] != '/') *u++ = '/';
s = el->attr_value; while(*s) *u++ = *s++;
*u = 0;
}
static char img_resp[RESP_BUF_SIZE];
int resp_len = fetch_content(url, img_resp, sizeof(img_resp));
char *body = strstr(img_resp, "\r\n\r\n");
if (body) {
body += 4;
int hdr_len = body - img_resp;
int body_len = resp_len - hdr_len;
if (strstr(img_resp, "Transfer-Encoding: chunked")) {
body_len = decode_chunked_bin(body, body_len);
}
decode_jpeg((unsigned char*)body, body_len, el);
}
}
static int line_elements[512];
static int line_element_count = 0;
static int cur_line_y = 10;
static int cur_line_x = 10;
static void flush_line(bool centered) {
if (line_element_count == 0) return;
int line_w = 0;
for (int i = 0; i < line_element_count; i++) line_w += elements[line_elements[i]].w;
int offset_x = centered ? (WIN_W - SCROLL_BAR_W - line_w) / 2 : 10;
if (offset_x < 10) offset_x = 10;
int max_h = 16;
for (int i = 0; i < line_element_count; i++) {
RenderElement *el = &elements[line_elements[i]];
el->x = offset_x;
el->y = cur_line_y;
offset_x += el->w;
if (el->tag == TAG_IMG && el->img_h + 10 > max_h) max_h = el->img_h + 10;
if ((el->tag == TAG_INPUT || el->tag == TAG_BUTTON) && 24 + 10 > max_h) max_h = 24 + 10;
}
cur_line_y += max_h;
cur_line_x = 10;
line_element_count = 0;
total_content_height = cur_line_y + 50;
}
static void parse_html(const char *html) {
browser_clear();
cur_line_y = 10; cur_line_y = 10; cur_line_x = 10; line_element_count = 0;
int i = 0; bool is_centered = false; bool is_bold = false; uint32_t current_color = COLOR_TEXT; char current_link[256] = "";
char current_form_action[256] = ""; int current_form_id = 0;
bool skip_content = false;
next_form_id = 1;
while (html[i] && element_count < MAX_ELEMENTS) {
if (html[i] == '<') {
if (html[i+1] == '!' && html[i+2] == '-' && html[i+3] == '-') {
i += 4;
while (html[i] && !(html[i] == '-' && html[i+1] == '-' && html[i+2] == '>')) i++;
if (html[i]) i += 3;
continue;
}
i++; char tag_name[64]; int tag_idx = 0;
while (html[i] && html[i] != '>' && html[i] != ' ' && tag_idx < 63) tag_name[tag_idx++] = html[i++];
tag_name[tag_idx] = 0;
char attr_buf[1024] = "";
if (html[i] == ' ') {
i++; int a_idx = 0;
while (html[i] && html[i] != '>' && a_idx < 1023) attr_buf[a_idx++] = html[i++];
attr_buf[a_idx] = 0;
}
if (html[i] == '>') i++;
if (tag_name[0] == '/') {
if (str_istarts_with(tag_name+1, "center")) { flush_line(is_centered); is_centered = false; }
else if (tag_name[1] == 'h' && tag_name[2] >= '1' && tag_name[2] <= '6') { flush_line(is_centered); cur_line_y += 10; is_bold = false; }
else if (str_istarts_with(tag_name+1, "form")) {
flush_line(is_centered);
current_form_id = 0; current_form_action[0] = 0;
}
else if (str_istarts_with(tag_name+1, "a")) current_link[0] = 0;
else if (str_istarts_with(tag_name+1, "p") || str_istarts_with(tag_name+1, "li") || str_istarts_with(tag_name+1, "ol") || str_istarts_with(tag_name+1, "div")) flush_line(is_centered);
else if (str_istarts_with(tag_name+1, "font")) current_color = COLOR_TEXT;
else if (str_istarts_with(tag_name+1, "head") || (tag_name[1] == 's' && tag_name[2] == 'c') || (tag_name[1] == 's' && tag_name[2] == 'i') || (tag_name[1] == 's' && tag_name[2] == 't') || str_istarts_with(tag_name+1, "title") || str_istarts_with(tag_name+1, "noscript") || str_istarts_with(tag_name+1, "style")) skip_content = false;
} else {
if (str_istarts_with(tag_name, "center")) { flush_line(is_centered); is_centered = true; }
else if (tag_name[0] == 'h' && tag_name[1] >= '1' && tag_name[1] <= '6') { flush_line(is_centered); cur_line_y += 10; is_bold = true; }
else if (str_istarts_with(tag_name, "br")) flush_line(is_centered);
else if (str_istarts_with(tag_name, "h") || str_istarts_with(tag_name, "p") || str_istarts_with(tag_name, "hr") || str_istarts_with(tag_name, "li") || str_istarts_with(tag_name, "ol") || str_istarts_with(tag_name, "div")) flush_line(is_centered);
else if (str_istarts_with(tag_name, "form")) {
flush_line(is_centered);
current_form_id = next_form_id++;
char *action = str_istrstr(attr_buf, "action=\"");
if (action) {
action += 8; int l = 0;
while(action[l] && action[l] != '\"' && l < 255) { current_form_action[l] = action[l]; l++; }
current_form_action[l] = 0;
} else current_form_action[0] = 0;
}
else if (str_istarts_with(tag_name, "head") || str_istarts_with(tag_name, "script") || str_istarts_with(tag_name, "style") || str_istarts_with(tag_name, "title") || str_istarts_with(tag_name, "noscript") || str_istarts_with(tag_name, "meta") || str_istarts_with(tag_name, "link") || str_istarts_with(tag_name, "!doctype")) skip_content = true;
else if (str_istarts_with(tag_name, "body")) skip_content = false;
else if (str_istarts_with(tag_name, "a")) {
char *href = str_istrstr(attr_buf, "href=\"");
if (href) {
href += 6; int l = 0;
while(href[l] && href[l] != '\"' && l < 255) { current_link[l] = href[l]; l++; }
current_link[l] = 0;
}
} else if (str_istarts_with(tag_name, "img")) {
RenderElement *el = &elements[element_count++];
int idx = element_count - 1;
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0;
el->tag = TAG_IMG; el->w = 100; el->h = 80; el->centered = is_centered;
char *src = str_istrstr(attr_buf, "src=\"");
if (src) {
src += 5; int l = 0;
while(src[l] && src[l] != '\"' && l < 255) { el->attr_value[l] = src[l]; l++; }
el->attr_value[l] = 0; load_image(el);
}
if (el->img_pixels) { el->w = el->img_w; el->h = el->img_h; }
line_elements[line_element_count++] = element_count - 1;
if (is_centered || cur_line_x + el->w > WIN_W - SCROLL_BAR_W - 20) flush_line(is_centered);
else cur_line_x += el->w;
} else if (str_istarts_with(tag_name, "input")) {
RenderElement *el = &elements[element_count++];
int idx = element_count - 1;
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0;
el->tag = TAG_INPUT; el->w = 160; el->h = 24; el->centered = is_centered;
char *val = str_istrstr(attr_buf, "value=\"");
char *ph = str_istrstr(attr_buf, "placeholder=\"");
char *type = str_istrstr(attr_buf, "type=\"");
char *name = str_istrstr(attr_buf, "name=\"");
el->form_id = current_form_id;
int l;
l = 0; while(current_form_action[l]) { el->form_action[l] = current_form_action[l]; l++; } el->form_action[l] = 0;
if (name) {
name += 6; l = 0;
while(name[l] && name[l] != '\"' && l < 63) { el->input_name[l] = name[l]; l++; }
el->input_name[l] = 0;
} else {
l = 0; const char *dn = "q"; while(dn[l]) { el->input_name[l] = dn[l]; l++; } el->input_name[l] = 0;
}
if (type && str_istarts_with(type+6, "submit")) el->tag = TAG_BUTTON;
if (val) {
val += 7; int l = 0;
while(val[l] && val[l] != '\"' && l < 255) { el->attr_value[l] = val[l]; l++; }
el->attr_value[l] = 0;
} else if (ph) {
ph += 13; int l = 0;
while(ph[l] && ph[l] != '\"' && l < 255) { el->attr_value[l] = ph[l]; l++; }
el->attr_value[l] = 0;
} else el->attr_value[0] = 0;
if (el->tag == TAG_BUTTON) el->w = (int)strlen(el->attr_value) * 8 + 20;
line_elements[line_element_count++] = element_count - 1;
if (is_centered || cur_line_x + el->w > WIN_W - SCROLL_BAR_W - 20) flush_line(is_centered);
else cur_line_x += el->w;
}
}
} else {
if (!skip_content) {
while (html[i] && html[i] != '<') {
while (html[i] && (html[i] == ' ' || html[i] == '\n' || html[i] == '\r')) i++;
if (!html[i] || html[i] == '<') break;
char word[256]; int w_idx = 0;
while (html[i] && html[i] != '<' && html[i] != ' ' && html[i] != '\n' && html[i] != '\r' && w_idx < 255) {
word[w_idx++] = html[i++];
}
word[w_idx] = 0;
if (w_idx > 0) {
if (element_count >= MAX_ELEMENTS) break;
int word_w = w_idx * 8;
if (cur_line_x + word_w > WIN_W - SCROLL_BAR_W - 20) flush_line(is_centered);
RenderElement *el = &elements[element_count++];
for (int k=0; k<(int)sizeof(RenderElement); k++) ((char*)el)[k] = 0;
int k=0; while(word[k]) { el->content[k] = word[k]; k++; }
el->content[k++] = ' '; el->content[k] = 0;
el->w = (w_idx + 1) * 8; el->h = 16;
el->tag = TAG_NONE; el->color = current_link[0] ? COLOR_LINK : current_color;
el->centered = is_centered; el->bold = is_bold;
if (current_link[0]) { int k=0; while(current_link[k]) { el->link_url[k] = current_link[k]; k++; } el->link_url[k] = 0; }
line_elements[line_element_count++] = element_count - 1;
cur_line_x += el->w;
}
}
} else {
while (html[i] && html[i] != '<') i++;
}
}
}
flush_line(is_centered);
}
static void browser_paint(void) {
ui_draw_rect(win_browser, 0, 0, WIN_W, WIN_H, COLOR_BG);
ui_draw_rect(win_browser, 0, 0, WIN_W, URL_BAR_H, COLOR_URL_BAR);
ui_draw_string(win_browser, 10, 8, url_input_buffer, COLOR_URL_TEXT);
if (focused_element == -1) {
ui_draw_rect(win_browser, 10 + url_cursor * 8, 22, 8, 2, COLOR_URL_TEXT);
}
// Scroll bar
ui_draw_rect(win_browser, WIN_W - SCROLL_BAR_W, URL_BAR_H, SCROLL_BAR_W, WIN_H - URL_BAR_H, COLOR_SCROLL_BG);
int thumb_h = (WIN_H - URL_BAR_H) * (WIN_H - URL_BAR_H) / (total_content_height > WIN_H ? total_content_height : WIN_H);
if (thumb_h < 20) thumb_h = 20;
int thumb_y = URL_BAR_H + (scroll_y * (WIN_H - URL_BAR_H - thumb_h)) / (total_content_height > WIN_H - URL_BAR_H ? total_content_height - (WIN_H - URL_BAR_H) : 1);
ui_draw_rect(win_browser, WIN_W - SCROLL_BAR_W + 2, thumb_y, SCROLL_BAR_W - 4, thumb_h, COLOR_SCROLL_BTN);
for (int i = 0; i < element_count; i++) {
RenderElement *el = &elements[i];
int draw_y = el->y - scroll_y + URL_BAR_H;
if (draw_y < URL_BAR_H - 1000 || draw_y > WIN_H) continue;
if (el->tag == TAG_IMG) {
if (el->img_pixels) ui_draw_image(win_browser, el->x, draw_y, el->img_w, el->img_h, el->img_pixels);
else ui_draw_rect(win_browser, el->x, draw_y, 100, 80, 0xFFCCCCCC);
} else if (el->tag == TAG_INPUT) {
ui_draw_rect(win_browser, el->x, draw_y, el->w, el->h, 0xFFFFFFFF);
uint32_t border = (focused_element == i) ? 0xFF0000FF : 0xFF808080;
ui_draw_rect(win_browser, el->x, draw_y, el->w, 1, border);
ui_draw_rect(win_browser, el->x, draw_y + el->h - 1, el->w, 1, border);
ui_draw_rect(win_browser, el->x, draw_y, 1, el->h, border);
ui_draw_rect(win_browser, el->x + el->w - 1, draw_y, 1, el->h, border);
ui_draw_string(win_browser, el->x + 5, draw_y + 4, el->attr_value, (focused_element == i) ? 0xFF000000 : 0xFF808080);
if (focused_element == i) {
int ilen = 0; while(el->attr_value[ilen]) ilen++;
ui_draw_rect(win_browser, el->x + 5 + ilen * 8, draw_y + 18, 8, 2, 0xFF000000);
}
} else if (el->tag == TAG_BUTTON) {
ui_draw_rect(win_browser, el->x, draw_y, el->w, el->h, 0xFFDDDDDD);
ui_draw_rect(win_browser, el->x, draw_y, el->w, 1, 0xFFFFFFFF);
ui_draw_rect(win_browser, el->x, draw_y + el->h - 1, el->w, 1, 0xFF888888);
ui_draw_rect(win_browser, el->x, draw_y, 1, el->h, 0xFFFFFFFF);
ui_draw_rect(win_browser, el->x + el->w - 1, draw_y, 1, el->h, 0xFF888888);
ui_draw_string(win_browser, el->x + 10, draw_y + 4, el->attr_value, 0xFF000000);
} else {
ui_draw_string(win_browser, el->x, draw_y, el->content, el->color);
if (el->bold) ui_draw_string(win_browser, el->x + 1, draw_y, el->content, el->color);
}
}
}
static void navigate(const char *url) {
static char main_resp[RESP_BUF_SIZE];
int resp_len = fetch_content(url, main_resp, sizeof(main_resp));
if (resp_len <= 0) return;
char *body = strstr(main_resp, "\r\n\r\n");
if (body) {
body += 4;
int hdr_len = body - main_resp;
int body_len = resp_len - hdr_len;
if (strstr(main_resp, "Transfer-Encoding: chunked")) {
body_len = decode_chunked_bin(body, body_len);
}
parse_html(body);
}
}
static void net_init_if_needed(void) {
if (!sys_network_is_initialized()) sys_network_init();
if (!sys_network_has_ip()) sys_network_dhcp_acquire();
}
int main(int argc, char **argv) {
win_browser = ui_window_create("Boredweb", 50, 50, WIN_W, WIN_H);
net_init_if_needed();
if (argc > 1) { int k=0; while(argv[1][k]) { url_input_buffer[k] = argv[1][k]; k++; } url_input_buffer[k] = 0; url_cursor = k; }
navigate(url_input_buffer);
browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H);
gui_event_t ev;
while (1) {
if (ui_get_event(win_browser, &ev)) {
if (ev.type == GUI_EVENT_PAINT) { browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H); }
else if (ev.type == GUI_EVENT_CLICK) {
int mx = ev.arg1;
if (mx >= WIN_W - SCROLL_BAR_W) {
if (ev.arg2 < URL_BAR_H + (WIN_H - URL_BAR_H)/2) scroll_y -= 100;
else scroll_y += 100;
if (scroll_y < 0) scroll_y = 0;
browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H);
continue;
}
if (ev.arg2 < URL_BAR_H) { focused_element = -1; browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H); continue; }
int my = ev.arg2 - URL_BAR_H + scroll_y;
bool found = false;
for (int i = 0; i < element_count; i++) {
RenderElement *el = &elements[i];
if (mx >= el->x && mx < el->x + el->w && my >= el->y && my < el->y + el->h) {
if (el->tag == TAG_INPUT) {
focused_element = i; found = true; browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H); break;
}
if (el->tag == TAG_BUTTON) {
int fid = el->form_id;
int search_idx = -1;
for (int k=0; k<element_count; k++) if (elements[k].tag == TAG_INPUT && elements[k].form_id == fid) { search_idx = k; break; }
if (search_idx >= 0) {
char search_url[1024];
char *u = search_url;
const char *s;
if (el->form_action[0] == '/') {
s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++;
if (current_port != 80) {
*u++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
const char* ps = pbuf; while(*ps) *u++ = *ps++;
}
s = el->form_action; while(*s) *u++ = *s++;
} else if (str_istarts_with(el->form_action, "http")) {
s = el->form_action; while(*s) *u++ = *s++;
} else {
s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++;
if (current_port != 80) {
*u++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
const char* ps = pbuf; while(*ps) *u++ = *ps++;
}
if (current_host[0] && current_host[0] != '/') *u++ = '/';
if (el->form_action[0]) { s = el->form_action; while(*s) *u++ = *s++; }
}
s = (strstr(search_url, "?") ? "&" : "?");
while(*s) *u++ = *s++;
s = elements[search_idx].input_name; while(*s) *u++ = *s++;
*u++ = '=';
for (int m=0; elements[search_idx].attr_value[m] && (u - search_url) < 1020; m++) {
char sc = elements[search_idx].attr_value[m];
if (sc == ' ') *u++ = '+';
else *u++ = sc;
}
*u = 0;
int j=0; while(search_url[j]) { url_input_buffer[j] = search_url[j]; j++; } url_input_buffer[j] = 0; url_cursor = j;
navigate(url_input_buffer); scroll_y = 0; focused_element = -1;
browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H);
found = true; break;
}
}
if (el->link_url[0]) {
char new_url[512];
if (el->link_url[0] == '/') {
char *u = new_url; const char *s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++;
if (current_port != 80) {
*u++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
const char* ps = pbuf; while(*ps) *u++ = *ps++;
}
s = el->link_url; while(*s) *u++ = *s++; *u = 0;
} else if (str_istarts_with(el->link_url, "http")) {
int k=0; while(el->link_url[k]) { new_url[k] = el->link_url[k]; k++; } new_url[k] = 0;
} else {
char *u = new_url; const char *s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++;
if (current_port != 80) {
*u++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
const char* ps = pbuf; while(*ps) *u++ = *ps++;
}
if (current_host[0] && current_host[0] != '/') *u++ = '/';
s = el->link_url; while(*s) *u++ = *s++; *u = 0;
}
int j=0; while(new_url[j]) { url_input_buffer[j] = new_url[j]; j++; } url_input_buffer[j] = 0; url_cursor = j;
navigate(url_input_buffer); scroll_y = 0; focused_element = -1;
browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H);
found = true; break;
}
}
}
if (!found) { focused_element = -1; browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H); }
} else if (ev.type == GUI_EVENT_KEY) {
char c = (char)ev.arg1;
if (focused_element == -1) {
if (c == 13 || c == 10) { navigate(url_input_buffer); scroll_y = 0; }
else if (c == 127 || c == 8) { if (url_cursor > 0) url_input_buffer[--url_cursor] = 0; }
else if (c >= 32 && c <= 126 && url_cursor < 511) { url_input_buffer[url_cursor++] = c; url_input_buffer[url_cursor] = 0; }
} else {
RenderElement *el = &elements[focused_element];
int len = 0; while(el->attr_value[len]) len++;
if (c == 13 || c == 10) {
char search_url[1024];
char *u = search_url;
const char *s;
if (el->form_action[0] == '/') {
s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++;
if (current_port != 80) {
*u++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
const char* ps = pbuf; while(*ps) *u++ = *ps++;
}
s = el->form_action; while(*s) *u++ = *s++;
} else if (str_istarts_with(el->form_action, "http")) {
s = el->form_action; while(*s) *u++ = *s++;
} else {
s = "http://"; while(*s) *u++ = *s++;
s = current_host; while(*s) *u++ = *s++;
if (current_port != 80) {
*u++ = ':';
char pbuf[10]; itoa(current_port, pbuf);
const char* ps = pbuf; while(*ps) *u++ = *ps++;
}
if (current_host[0] && current_host[0] != '/') *u++ = '/';
if (el->form_action[0]) { s = el->form_action; while(*s) *u++ = *s++; }
}
s = (strstr(search_url, "?") ? "&" : "?");
while(*s) *u++ = *s++;
s = el->input_name; while(*s) *u++ = *s++;
*u++ = '=';
for (int m=0; el->attr_value[m] && (u - search_url) < 1020; m++) {
char sc = el->attr_value[m];
if (sc == ' ') *u++ = '+';
else *u++ = sc;
}
*u = 0;
int j=0; while(search_url[j]) { url_input_buffer[j] = search_url[j]; j++; } url_input_buffer[j] = 0; url_cursor = j;
navigate(url_input_buffer); scroll_y = 0; focused_element = -1;
}
else if (c == 127 || c == 8) { if (len > 0) el->attr_value[--len] = 0; }
else if (c >= 32 && c <= 126 && len < 255) { el->attr_value[len++] = c; el->attr_value[len] = 0; }
}
if (c == 17) { scroll_y -= 40; }
else if (c == 18) { scroll_y += 40; }
else if (c == 19) { scroll_y -= 200; } // Page Up
else if (c == 20) { scroll_y += 200; } // Page Down
int max_scroll = total_content_height - (WIN_H - URL_BAR_H);
if (max_scroll < 0) max_scroll = 0;
if (scroll_y > max_scroll) scroll_y = max_scroll;
if (scroll_y < 0) scroll_y = 0;
browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H);
} else if (ev.type == 9) { // GUI_EVENT_MOUSE_WHEEL
scroll_y += ev.arg1 * 20;
int max_scroll = total_content_height - (WIN_H - URL_BAR_H);
if (max_scroll < 0) max_scroll = 0;
if (scroll_y > max_scroll) scroll_y = max_scroll;
if (scroll_y < 0) scroll_y = 0;
browser_paint(); ui_mark_dirty(win_browser, 0, 0, WIN_W, WIN_H);
} else if (ev.type == GUI_EVENT_CLOSE) sys_exit(0);
} else { for(volatile int x=0; x<10000; x++); }
}
return 0;
}
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