From f6caaabef2c3fc8c10d5ac584e4258dc24186f84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Franti=C5=A1ek=20Boh=C3=A1=C4=8Dek?=
 <fandabohacek@gmail.com>
Date: Sun, 20 Jun 2021 21:19:26 +0200
Subject: [PATCH] feat: add gui text component

---
 text-viewer/include/gui_component_text.h | 21 ++++++++++++++++
 text-viewer/src/gui_component_text.c     | 32 ++++++++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 text-viewer/include/gui_component_text.h
 create mode 100644 text-viewer/src/gui_component_text.c

diff --git a/text-viewer/include/gui_component_text.h b/text-viewer/include/gui_component_text.h
new file mode 100644
index 0000000000000000000000000000000000000000..e106bfd8f544a87c0ea0e58dfb0049ab95f3981a
--- /dev/null
+++ b/text-viewer/include/gui_component_text.h
@@ -0,0 +1,21 @@
+#ifndef __GUI_COMPONENT_TEXT_H__
+#define __GUI_COMPONENT_TEXT_H__
+
+#include "display_utils.h"
+#include "gui.h"
+
+typedef struct {
+  char *line;
+  font_t *font;
+  display_pixel_t color;
+} text_t;
+
+component_t gui_text_create(text_t *text, int16_t x, int16_t y,
+                            int16_t w, int16_t h);
+
+void gui_text_render(container_t *container, component_t *component,
+                     gui_t *gui);
+void gui_text_update(container_t *container, component_t *component,
+                     gui_t *gui);
+
+#endif // __GUI_COMPONENT_TEXT_H__
diff --git a/text-viewer/src/gui_component_text.c b/text-viewer/src/gui_component_text.c
new file mode 100644
index 0000000000000000000000000000000000000000..3530f0d6ced8ddb24104368df4ca859efb601686
--- /dev/null
+++ b/text-viewer/src/gui_component_text.c
@@ -0,0 +1,32 @@
+#include "gui_component_text.h"
+#include "font.h"
+#include "renderer.h"
+
+component_t gui_text_create(text_t *text, int16_t x, int16_t y, int16_t w,
+                            int16_t h) {
+  component_t comp =
+      gui_component_create(x, y, w, h, gui_text_render, gui_text_update);
+  comp.state = text;
+
+  if (w == 0 || h == 0) {
+    size2d_t measured = font_measure_text(text->font, text->line);
+
+    comp.width = comp.width != 0 ? comp.width : measured.x;
+    comp.height = comp.height != 0 ? comp.height : measured.y;
+  }
+
+  return comp;
+}
+
+void gui_text_render(container_t *container, component_t *component,
+                     gui_t *gui) {
+  if (gui_is_component_visible(gui, container, component)) {
+    text_t *state = (text_t*)component->state;
+    renderer_write_string(gui->renderer, component->x, component->y, 0, state->font, state->line, state->color);
+  }
+}
+
+void gui_text_update(container_t *container, component_t *component,
+                     gui_t *gui) {
+  // do nothing -- maybe horizontal scroll?
+}