keyboard support in raleigh, word wrap and more in entry widget

1 files changed, 170 insertions, 45 deletions

diff --git a/src/user/raleigh/w/entry.cpp b/src/user/raleigh/w/entry.cpp
index de8bd82..1c6f91e 100644
--- a/src/user/raleigh/w/entry.cpp
+++ b/src/user/raleigh/w/entry.cpp
@@ -2,55 +2,76 @@
 #include <knob/format.h>
 #include <knob/block.h>
 #include <knob/heap.h>
+#include <knob/key.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);
+      line_indices(new uint32_t[rows + 1]), first_paint(true),
+      has_focus(false) {
+    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;
+    const uint32_t l = strlen(default_text);
+    const uint32_t cl = l > rows * cols - 1 ? rows * cols - 1 : l;
+    blockcpy(data, default_text, cl);
+    data[cl] = '\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;
+    get_indices(0, 0, 0);
     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;
+  void entry::get_indices(uint32_t from_y, uint32_t from_x, uint32_t from_d) {
+    while (1) {
+      const uint32_t ln = str_find_any(data + from_d, " \n");
+      bool quit_after = !data[from_d + ln];
+      if ((from_x + ln <= cols) || (ln >= cols)) {
+        from_x += ln;
+        from_d += ln;
+        if (data[from_d] == '\n') {
+          ++from_y;
+          from_x = 0;
+          line_indices[from_y] = from_d + 1;
+        }
+        else
+          ++from_x;
+        ++from_d;
+        if (from_x >= cols) {
+          ++from_y;
+          from_x = 0;
+          line_indices[from_y] = from_d;
+        }
+        if (quit_after)
+          break;
       }
       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);
+        ++from_y;
+        from_x = 0;
+        line_indices[from_y] = from_d;
       }
     }
+    line_indices[from_y + 1] = from_d;
+    end_y = from_y;
+    end_x = from_x;
+    end_d = from_d;
+  }
+
+  void entry::notify_window_change() {}
+
+  void entry::paint_text(_pixel_t *pixbuf, uint32_t pitch) {
+    for (uint32_t y = 0; y <= end_y; ++y) {
+      const char *const line = data + line_indices[y];
+      const uint32_t len = line_indices[y + 1] - line_indices[y] >= cols ? cols : line_indices[y + 1] - line_indices[y];
+      for (uint32_t x = 0; x < len; ++x)
+        if ((line[x] != '\n') && line[x])
+          put_char_no_bg(fi, line[x], 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) {
@@ -83,28 +104,40 @@ namespace raleigh {
       text_changed_since_last_paint = false;
     }
 
-    else {
+    else if (had_focus_last_paint) {
       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'))
+      if (data[cur_d_last_paint] && (data[cur_d_last_paint] != '\n') && (cur_d_last_paint < line_indices[cur_y_last_paint + 1]))
         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;
-    }
+    if (has_focus)
+      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;
+    had_focus_last_paint = has_focus;
+  }
+
+  void entry::ensure_cursor_in_line() {
+    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] && (data[cur_d] != '\n'))
+        ++cur_d;
+      cur_x = cur_d - line_indices[cur_y];
+    }
   }
 
-  bool entry::try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
+  void entry::handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
     if (up || (click_type != mouse_packet::LEFT))
-      return false;
+      return;
 
     if (window_coords.x - window_offset.x < 3)
       window_coords.x = 3 + window_offset.x;
@@ -121,18 +154,110 @@ namespace raleigh {
       cur_y = end_y;
       cur_x = end_x;
     }
+    ensure_cursor_in_line();
+
+    if (has_focus)
+      w->notify_needs_paint(*this);
+    else
+      w->focus(*this);
+  }
+
+  void entry::notify_has_opaque_parent(widget *parent) {}
+
+  bool entry::cursor_left() {
+    if (cur_x) {
+      --cur_x;
+      --cur_d;
+      return true;
+    }
+    if (!cur_y)
+      return false;
+
+    --cur_y;
+    cur_x = line_indices[cur_y + 1] - line_indices[cur_y] - 1;
+    if (cur_x == cols)
+      --cur_x;
     cur_d = line_indices[cur_y] + cur_x;
+    return true;
+  }
+
+  bool entry::cursor_right() {
+    if (cur_d >= (end_d - 1))
+      return false;
+
+    ++cur_d;
+    ++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];
+      cur_x = 0;
+      ++cur_y;
+      cur_d = line_indices[cur_y];
     }
 
-    w->notify_needs_paint(*this);
     return true;
   }
 
-  void entry::notify_has_opaque_parent(widget *parent) {}
+  bool entry::cursor_up() {
+    if (!cur_y)
+      return false;
+
+    --cur_y;
+    ensure_cursor_in_line();
+    return true;
+  }
+
+  bool entry::cursor_down() {
+    if (cur_y == end_y)
+      return false;
+
+    ++cur_y;
+    ensure_cursor_in_line();
+    return true;
+  }
+
+  void entry::handle_key(struct key_packet kp) {
+    switch (kp.key_id) {
+    case kp.KEY_LEFT_ARROW:
+      if (cursor_left() && has_focus)
+        w->notify_needs_paint(*this);
+      break;
+    case kp.KEY_RIGHT_ARROW:
+      if (cursor_right() && has_focus)
+        w->notify_needs_paint(*this);
+      break;
+    case kp.KEY_DOWN_ARROW:
+      if (cursor_down() && has_focus)
+        w->notify_needs_paint(*this);
+      break;
+    case kp.KEY_UP_ARROW:
+      if (cursor_up() && has_focus)
+        w->notify_needs_paint(*this);
+      break;
+    case kp.KEY_HOME:
+      if (cur_x) {
+        cur_x = 0;
+        if (has_focus)
+          w->notify_needs_paint(*this);
+      }
+      break;
+    case kp.KEY_END:
+      cur_x = cols;
+      ensure_cursor_in_line();
+      if (has_focus)
+        w->notify_needs_paint(*this);
+      break;
+    default:
+      break;
+    }
+  }
+
+  void entry::on_focus() {
+    has_focus = true;
+    w->notify_needs_paint(*this);
+  }
+
+  void entry::on_unfocus() {
+    has_focus = false;
+    w->notify_needs_paint(*this);
+  }
 }
\ No newline at end of file