text entry, with cursor, but no keyboard

makefile

@@ -105,7 +105,7 @@ obj/popups.so: obj/popups/info.o obj/popups/popup.o
 obj/raleigh.so: obj/raleigh/runtime.po   obj/raleigh/window.po   \
                 obj/raleigh/w/label.po   obj/raleigh/util.po     \
                 obj/raleigh/w/padding.po obj/raleigh/w/button.po \
-                obj/raleigh/w/vbox.po
+                obj/raleigh/w/vbox.po    obj/raleigh/w/entry.po
 	ld ${partlink} $^ -o $@
 
 obj/init.elf: obj/init/init.o obj/knob.so obj/c.rto

src/user/include/cxx/raleigh/w/entry.h

@@ -0,0 +1,52 @@
+#ifndef RALEIGH_W_ENTRY_H
+#define RALEIGH_W_ENTRY_H
+
+#include <raleigh/widget.h>
+#include <libfont/fonts.h>
+
+namespace raleigh {
+  class entry : public widget {
+  public:
+    //default_text's data is copied, so it's okay if it changes or if the memory is freed
+    entry(uint32_t rows, uint32_t cols, const char *default_text="",
+          const char *font="fixed-10", _pixel_t bg=RGB(ff, ff, ff),
+          _pixel_t fg=RGB(00, 00, 00), _pixel_t border_color=RGB(00, 00, 00));
+
+    void notify_window_change();
+    void paint(_pixel_t *pixbuf, uint32_t pitch);
+    bool try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up);
+    void notify_has_opaque_parent(widget *parent);
+  private:
+    uint32_t rows;
+    uint32_t cols;
+    _pixel_t bg;
+    _pixel_t fg;
+    _pixel_t border_color;
+
+    struct font_info *fi;
+    char *data;
+    //line_indices[end_y + 1] == end_d
+    uint32_t *line_indices;
+
+    uint32_t cur_y;
+    uint32_t cur_x;
+    uint32_t cur_d;
+
+    //the row of the last character
+    uint32_t end_y;
+    //the column after the last character
+    uint32_t end_x;
+    //the index of the null terminator
+    uint32_t end_d;
+
+    bool first_paint;
+    bool text_changed_since_last_paint;
+    uint32_t cur_y_last_paint;
+    uint32_t cur_x_last_paint;
+    uint32_t cur_d_last_paint;
+
+    void paint_text(_pixel_t *pixbuf, uint32_t pitch);
+  };
+}
+
+#endif

src/user/include/knob/format.h

@@ -1,6 +1,10 @@
 #ifndef KNOB_FORMAT_H
 #define KNOB_FORMAT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <knob/heap.h>
 
 #include <stdint.h>
@@ -26,4 +30,8 @@ uint32_t try_swtou(const char *from, uint32_t *i_out);
 //returns 0 on failure
 uint32_t try_swtoh(const char *from, uint32_t *i_out);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

src/user/raleigh/w/entry.cpp

@@ -0,0 +1,138 @@
+#include <raleigh/w/entry.h>
+#include <knob/format.h>
+#include <knob/block.h>
+#include <knob/heap.h>
+
+namespace raleigh {
+  entry::entry(uint32_t rows, uint32_t cols, const char *default_text,
+    const char *font, _pixel_t bg, _pixel_t fg, _pixel_t border_color)
+    : rows(rows), cols(cols), bg(bg), fg(fg), border_color(border_color),
+      fi(get_font(font)), data(new char[rows * cols]),
+      line_indices(new uint32_t[rows + 1]), first_paint(true) {
+    size = coord(fi->space_width * (cols - 1) + fi->char_width + 6, fi->space_height * (rows - 1) + fi->char_height + 6);
+    closest_opaque = this;
+
+    end_x = 0;
+    end_y = 0;
+    line_indices[0] = 0;
+    for (end_d = 0; default_text[end_d]; ++end_d) {
+      if (end_d == rows * cols - 1)
+        break;
+      data[end_d] = default_text[end_d];
+      if ((default_text[end_d] == '\n') || (++end_x == cols)) {
+        if (end_y == rows - 1)
+          break;
+        line_indices[++end_y] = end_d + 1;
+        end_x = 0;
+      }
+    }
+    line_indices[end_y + 1] = end_d;
+    cur_x = end_x;
+    cur_y = end_y;
+    cur_d = end_d;
+    data[end_d] = '\0';
+  }
+
+  void entry::notify_window_change() {}
+
+  void entry::paint_text(_pixel_t *pixbuf, uint32_t pitch) {
+    uint32_t y = 0;
+    uint32_t x = -1;
+    for (const char *i = data; *i; ++i) {
+      if (*i == '\n') {
+        ++y;
+        x = -1;
+      }
+      else {
+        if (++x == cols) {
+          ++y;
+          x = 0;
+        }
+        put_char_no_bg(fi, *i, pixbuf + (window_offset.y + 3 + y * fi->space_height) * pitch + (window_offset.x + 3 + x * fi->space_width), pitch, fg);
+      }
+    }
+  }
+
+  void entry::paint(_pixel_t *pixbuf, uint32_t pitch) {
+    _pixel_t *const cur_ptr = pixbuf + (window_offset.y + 3 + cur_y * fi->space_height) * pitch + (window_offset.x + 3 + cur_x * fi->space_width);
+    _pixel_t *const old_cur_ptr = pixbuf + (window_offset.y + 3 + cur_y_last_paint * fi->space_height) * pitch + (window_offset.x + 3 + cur_x_last_paint * fi->space_width);
+
+    if (first_paint) {
+      for (uint32_t x = 0; x < size.x; ++x) {
+        pixbuf[(window_offset.y) * pitch + window_offset.x + x] = border_color;
+        pixbuf[(window_offset.y + size.y - 1) * pitch + window_offset.x + x] = border_color;
+      }
+      for (uint32_t y = 1; y < size.y - 1; ++y) {
+        pixbuf[(window_offset.y + y) * pitch + window_offset.x] = border_color;
+        pixbuf[(window_offset.y + y) * pitch + window_offset.x + size.x - 1] = border_color;
+      }
+
+      for (uint32_t y = 1; y < size.y - 1; ++y)
+        for (uint32_t x = 1; x < size.x - 1; ++x)
+          pixbuf[(window_offset.y + y) * pitch + (window_offset.x + x)] = bg;
+
+      paint_text(pixbuf, pitch);
+      first_paint = false;
+    }
+
+    else if (text_changed_since_last_paint) {
+      for (uint32_t y = 3; y < size.y - 3; ++y)
+        for (uint32_t x = 3; x < size.x - 3; ++x)
+          pixbuf[(window_offset.y + y) * pitch + (window_offset.x + x)] = bg;
+      paint_text(pixbuf, pitch);
+      text_changed_since_last_paint = false;
+    }
+
+    else {
+      for (uint32_t y = 0; y < fi->char_height; ++y) {
+        old_cur_ptr[y * pitch] = bg;
+        old_cur_ptr[y * pitch + 1] = bg;
+      }
+      if (data[cur_d_last_paint] && (data[cur_d_last_paint] != '\n'))
+        put_char_no_bg(fi, data[cur_d_last_paint], old_cur_ptr, pitch, fg);
+    }
+
+    for (uint32_t y = 0; y < fi->char_height; ++y) {
+      cur_ptr[y * pitch] = fg;
+      cur_ptr[y * pitch + 1] = fg;
+    }
+
+    cur_y_last_paint = cur_y;
+    cur_x_last_paint = cur_x;
+    cur_d_last_paint = cur_d;
+  }
+
+  bool entry::try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
+    if (up || (click_type != mouse_packet::LEFT))
+      return false;
+
+    if (window_coords.x - window_offset.x < 3)
+      window_coords.x = 3 + window_offset.x;
+    else if (window_coords.x - window_offset.x > size.x - 4)
+      window_coords.x = size.x - 4 + window_offset.x;
+    if (window_coords.y - window_offset.y < 3)
+      window_coords.y = 3 + window_offset.y;
+    else if (window_coords.y - window_offset.y > size.y - 4)
+      window_coords.y = size.y - 4 + window_offset.y;
+
+    cur_y = (window_coords.y - window_offset.y - 3) / fi->space_height;
+    cur_x = (window_coords.x - window_offset.x - 3) / fi->space_width;
+    if (cur_y > end_y) {
+      cur_y = end_y;
+      cur_x = end_x;
+    }
+    cur_d = line_indices[cur_y] + cur_x;
+
+    if (cur_d >= line_indices[cur_y + 1]) {
+      cur_d = line_indices[cur_y + 1] - 1;
+      if (data[cur_d] != '\n')
+        ++cur_d;
+      cur_x = cur_d - line_indices[cur_y];
+    }
+
+    w->notify_needs_paint(*this);
+    return true;
+  }
+
+  void entry::notify_has_opaque_parent(widget *parent) {}
+}

src/user/raleigh/w/padding.cpp

@@ -27,5 +27,6 @@ namespace raleigh {
 
   void padding::notify_has_opaque_parent(widget *parent) {
     closest_opaque = parent;
+    inner.notify_has_opaque_parent(parent);
   }
 }

src/user/raleigh/w/vbox.cpp

@@ -41,5 +41,7 @@ namespace raleigh {
 
   void vbox::notify_has_opaque_parent(widget *parent) {
     closest_opaque = parent;
+    for (dllist<widget &>::node *n = widgets.first; n; n = n->next)
+      n->d.notify_has_opaque_parent(parent);
   }
 }

src/user/raleigh/window.cpp

@@ -3,6 +3,8 @@
 #include <popups/info.h>
 #include <knob/heap.h>
 
+#include <knob/format.h>
+
 namespace raleigh {
   window::window(widget &root, _pixel_t bg_color, bool (*on_close)(window &))
     : handle(0), size(root.size), root(root), bg_color(bg_color),
@@ -11,7 +13,7 @@ namespace raleigh {
     root.window_offset = coord(0, 0);
     root.notify_window_change();
 
-    pixbuf = (_pixel_t *)get_block(size.x * size.y * sizeof(_pixel_t));
+    pixbuf = new _pixel_t[size.x * size.y];
     if (!pixbuf)
       show_error_and_quitf("Failed to create %d byte pixel buffer\nfor requested %dx%d pixel window.", size.x * size.y * sizeof(_pixel_t), size.x, size.y);
 

src/user/rhello/main.cpp

@@ -1,6 +1,7 @@
 #include <raleigh/w/padding.h>
 #include <raleigh/w/button.h>
 #include <raleigh/w/label.h>
+#include <raleigh/w/entry.h>
 #include <raleigh/w/vbox.h>
 
 #include <raleigh/runtime.h>
@@ -26,7 +27,11 @@ void main() {
   button b(pbl, &onclick);
   padding pb(b, 2);
 
+  entry e(6, 20, "I'm a text entry!\nEventually you will be able to edit me.");
+  padding pe(e, 2);
+
   dllist<widget &> wl;
+  wl.add_front(pe);
   wl.add_front(pb);
   wl.add_front(pl);
   vbox vb(wl);

src/user/runtimes/cxx/extra.ld

@@ -1,5 +1,8 @@
 /* void *operator new(size_t) */
 _Znwj = get_block;
 
+/* void *operator new[](size_t) */
+_Znaj = get_block;
+
 /* void operator delete(void *, size_t) */
 _ZdlPvj = free_block;