OPTIMIZATION: Network and browser optimizations

.gitattributes

@@ -1,2 +0,0 @@
-# Auto detect text files and perform LF normalization
-* text=auto

src/net/network.c

@@ -224,7 +224,7 @@ int network_tcp_connect(const ipv4_address_t *ip, uint16_t port) {
     
     uint32_t start = sys_now();
     asm volatile("sti");
-    while (sys_now() - start < 5000) { // 5 second timeout
+    while (sys_now() - start < 15000) { // 15 second timeout
         network_poll_internal();
         if (tcp_connect_done) { asm volatile("cli"); network_processing = 0; return 0; }
         if (tcp_connect_error) { asm volatile("cli"); network_processing = 0; return -1; }
@@ -253,7 +253,7 @@ int network_tcp_recv(void *buf, size_t max_len) {
         if (tcp_closed) { network_processing = 0; return 0; } // End of stream
         uint32_t start = sys_now();
         asm volatile("sti");
-        while (sys_now() - start < 5000) { // 5 second timeout
+        while (sys_now() - start < 30000) { // 30 second timeout
             network_poll_internal();
             if (tcp_recv_queue) break;
             if (tcp_closed) break;
@@ -281,7 +281,10 @@ int network_tcp_recv_nb(void *buf, size_t max_len) {
     if (network_processing) return -1;
     network_processing = 1;
 
+    network_poll_internal();
+
     if (!tcp_recv_queue) {
+        if (tcp_closed) { network_processing = 0; return -2; }
         network_processing = 0;
         return 0;
     }

src/sys/process.c

@@ -469,6 +469,9 @@ static void process_cleanup_inner(process_t *proc) {
     extern void cmd_process_finished(void);
     cmd_process_finished();
     
+    extern void network_cleanup(void);
+    network_cleanup();
+    
     extern void network_cleanup_pcb(void *pcb);
     // TODO: We need per-process PCB tracking to call this safely
     // For now, let's NOT call global network_cleanup

src/userland/gui/browser.c

@@ -280,18 +280,93 @@ static int fetch_content(const char *url, char *dest_buf, int max_len, bool prog
     int total = 0;
     int last_render = 0;
     if (progressive) inc_parse_offset = 0; 
+    long long last_data_tick = sys_system(16, 0, 0, 0, 0);
+
     while (1) {
-        int len = sys_tcp_recv(dest_buf + total, max_len - 1 - total);
+        int len = sys_tcp_recv_nb(dest_buf + total, max_len - 1 - total);
-        if (len <= 0) break;
+        if (len < 0 && len != -2) break;
+        if (len == -2) break;
+        
+        if (len == 0) {
+            long long now = sys_system(16, 0, 0, 0, 0);
+            if (now > last_data_tick + 1800) break; // 30 sec timeout
+            
+            gui_event_t ev;
+            bool scrolled = false;
+            while (ui_get_event(win_browser, &ev)) {
+                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;
+                    scrolled = true;
+                } else if (ev.type == 12) { // GUI_EVENT_CLOSE
+                    sys_exit(0);
+                }
+            }
+            if (scrolled) {
+                browser_paint(); 
+                ui_mark_dirty(win_browser, 0, 0, win_w, win_h);
+            }
+            sleep(10);
+            continue;
+        }
+
+        last_data_tick = sys_system(16, 0, 0, 0, 0);
         total += len;
         if (total >= max_len - 1) break;
 
+        dest_buf[total] = 0;
+        char *body = strstr(dest_buf, "\r\n\r\n");
+        if (body) {
+            char temp = body[0];
+            body[0] = 0; // Null-terminate headers
+
+            int expected = -1;
+            char *cl = str_istrstr(dest_buf, "Content-Length:");
+            if (cl) {
+                cl += 15;
+                while (*cl == ' ') cl++;
+                expected = 0;
+                while (*cl >= '0' && *cl <= '9') {
+                    expected = expected * 10 + (*cl - '0');
+                    cl++;
+                }
+            }
+            
+            int is_chunked = 0;
+            char *te = str_istrstr(dest_buf, "Transfer-Encoding:");
+            if (te && str_istrstr(te, "chunked")) {
+                is_chunked = 1;
+            }
+
+            body[0] = temp; // Restore body
+            
+            body += 4;
+            int body_len = total - (body - dest_buf);
+            
+            if (expected != -1) {
+                if (body_len >= expected) break;
+            } else if (is_chunked) {
+                if (total >= 5 && dest_buf[total-5] == '0' && dest_buf[total-4] == '\r' && 
+                    dest_buf[total-3] == '\n' && dest_buf[total-2] == '\r' && dest_buf[total-1] == '\n') {
+                    break;
+                }
+            }
+        }
+
         if (progressive && total - last_render > 32768) {
             dest_buf[total] = 0;
             char *body = strstr(dest_buf, "\r\n\r\n");
             if (body) {
+                char temp = body[0];
+                body[0] = 0;
+                int is_chunked = strstr(dest_buf, "Transfer-Encoding: chunked") != NULL;
+                body[0] = temp;
+                
                 body += 4;
-                if (!strstr(dest_buf, "Transfer-Encoding: chunked")) {
+                if (!is_chunked) {
                     int body_len = total - (body - dest_buf);
                     int safe_len = body_len;
                     while (safe_len > 0 && body[safe_len - 1] != '>') safe_len--;
@@ -1436,7 +1511,9 @@ static void browser_paint(void) {
     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 - 400 || draw_y > win_h) continue;
+        int el_h = el->h;
+        if (el->tag == TAG_IMG && el->img_h > el_h) el_h = el->img_h;
+        if (draw_y + el_h < URL_BAR_H || draw_y > win_h) continue;
         if (el->tag == TAG_IMG) {
             uint32_t *pixels = el->img_pixels;
             if (el->img_frames) pixels = el->img_frames[el->img_current_frame];
@@ -1759,6 +1836,7 @@ int main(int argc, char **argv) {
                     if (c == 13 || c == 10) {
                         if (history_count < HISTORY_MAX) { int j=0; while(url_input_buffer[j]) { history_stack[history_count][j] = url_input_buffer[j]; j++; } history_stack[history_count][j] = 0; history_count++; }
                         navigate(url_input_buffer); scroll_y = 0;
+                        needs_repaint = true;
                     }
                     else if (c == 19) { if (url_cursor > 0) url_cursor--; }
                     else if (c == 20) { int len = 0; while(url_input_buffer[len]) len++; if (url_cursor < len) url_cursor++; }

src/wm/font_manager.c

@@ -71,12 +71,13 @@ static int loaded_font_count = 0;
 
 #define FONT_CACHE_SIZE 2048
 typedef struct {
-    char c;
+    uint32_t codepoint;
-    float pixel_height;
+    float scale;
+    void *font;
     int w, h, xoff, yoff;
     unsigned char *bitmap;
 } font_cache_entry_t;
-
+static font_cache_entry_t font_cache[FONT_CACHE_SIZE] = {0};
 
 bool font_manager_init(void) {
     return true;
@@ -200,20 +201,34 @@ void font_manager_render_char_scaled(ttf_font_t *font, int x, int y, uint32_t co
     if (!font) font = default_font;
     if (!font) return;
 
-    stbtt_fontinfo *info = (stbtt_fontinfo *)font->info;
+    uint32_t hash = (codepoint * 31 + (uint32_t)scale * 73) % FONT_CACHE_SIZE;
+    font_cache_entry_t *entry = &font_cache[hash];
     
     unsigned char *bitmap = NULL;
     int w, h, xoff, yoff;
     
-    float real_scale = stbtt_ScaleForPixelHeight(info, scale);
+    if (entry->bitmap && entry->codepoint == codepoint && entry->scale == scale && entry->font == font) {
+        bitmap = entry->bitmap;
+        w = entry->w; h = entry->h; xoff = entry->xoff; yoff = entry->yoff;
+    } else {
+        stbtt_fontinfo *info = (stbtt_fontinfo *)font->info;
+        float real_scale = stbtt_ScaleForPixelHeight(info, scale);
         
-    if (stbtt_FindGlyphIndex(info, codepoint) == 0 && fallback_font) {
+        if (stbtt_FindGlyphIndex(info, codepoint) == 0 && fallback_font) {
-        info = (stbtt_fontinfo *)fallback_font->info;
+            info = (stbtt_fontinfo *)fallback_font->info;
-        real_scale = stbtt_ScaleForPixelHeight(info, scale);
+            real_scale = stbtt_ScaleForPixelHeight(info, scale);
+        }
+
+        bitmap = stbtt_GetCodepointBitmap(info, 0, real_scale, codepoint, &w, &h, &xoff, &yoff);
+        
+        if (entry->bitmap) stbtt_FreeBitmap(entry->bitmap, NULL);
+        entry->codepoint = codepoint;
+        entry->scale = scale;
+        entry->font = font;
+        entry->w = w; entry->h = h; entry->xoff = xoff; entry->yoff = yoff;
+        entry->bitmap = bitmap;
     }
 
-    bitmap = stbtt_GetCodepointBitmap(info, 0, real_scale, codepoint, &w, &h, &xoff, &yoff);
-
     if (bitmap) {
         for (int row = 0; row < h; row++) {
             for (int col = 0; col < w; col++) {
@@ -226,7 +241,6 @@ void font_manager_render_char_scaled(ttf_font_t *font, int x, int y, uint32_t co
                 }
             }
         }
-        stbtt_FreeBitmap(bitmap, NULL);
     }
 }
 
@@ -234,20 +248,34 @@ void font_manager_render_char_sloped(ttf_font_t *font, int x, int y, uint32_t co
     if (!font) font = default_font;
     if (!font) return;
 
-    stbtt_fontinfo *info = (stbtt_fontinfo *)font->info;
+    uint32_t hash = (codepoint * 31 + (uint32_t)scale * 73) % FONT_CACHE_SIZE;
+    font_cache_entry_t *entry = &font_cache[hash];
     
     unsigned char *bitmap = NULL;
     int w, h, xoff, yoff;
     
-    float real_scale = stbtt_ScaleForPixelHeight(info, scale);
+    if (entry->bitmap && entry->codepoint == codepoint && entry->scale == scale && entry->font == font) {
+        bitmap = entry->bitmap;
+        w = entry->w; h = entry->h; xoff = entry->xoff; yoff = entry->yoff;
+    } else {
+        stbtt_fontinfo *info = (stbtt_fontinfo *)font->info;
+        float real_scale = stbtt_ScaleForPixelHeight(info, scale);
         
-    if (stbtt_FindGlyphIndex(info, codepoint) == 0 && fallback_font) {
+        if (stbtt_FindGlyphIndex(info, codepoint) == 0 && fallback_font) {
-        info = (stbtt_fontinfo *)fallback_font->info;
+            info = (stbtt_fontinfo *)fallback_font->info;
-        real_scale = stbtt_ScaleForPixelHeight(info, scale);
+            real_scale = stbtt_ScaleForPixelHeight(info, scale);
+        }
+
+        bitmap = stbtt_GetCodepointBitmap(info, 0, real_scale, codepoint, &w, &h, &xoff, &yoff);
+        
+        if (entry->bitmap) stbtt_FreeBitmap(entry->bitmap, NULL);
+        entry->codepoint = codepoint;
+        entry->scale = scale;
+        entry->font = font;
+        entry->w = w; entry->h = h; entry->xoff = xoff; entry->yoff = yoff;
+        entry->bitmap = bitmap;
     }
 
-    bitmap = stbtt_GetCodepointBitmap(info, 0, real_scale, codepoint, &w, &h, &xoff, &yoff);
-
     if (bitmap) {
         for (int row = 0; row < h; row++) {
             int slant_offset = (int)((h - row) * slope);
@@ -262,7 +290,6 @@ void font_manager_render_char_sloped(ttf_font_t *font, int x, int y, uint32_t co
                 }
             }
         }
-        stbtt_FreeBitmap(bitmap, NULL);
     }
 }