From 58be27abc63c8043cb3e2ccfc48b6c1a9dfda047 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Franti=C5=A1ek=20Boh=C3=A1=C4=8Dek?=
 <fandabohacek@gmail.com>
Date: Mon, 28 Jun 2021 22:17:57 +0200
Subject: [PATCH] feat: split text into multiple lines so it fits

---
 lib-gui/src/gui_component_text.c | 33 ++++++++++++++++++++++++++++++--
 text-viewer/src/text_viewer.c    |  2 +-
 2 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/lib-gui/src/gui_component_text.c b/lib-gui/src/gui_component_text.c
index 3530f0d..8a77091 100644
--- a/lib-gui/src/gui_component_text.c
+++ b/lib-gui/src/gui_component_text.c
@@ -1,6 +1,7 @@
 #include "gui_component_text.h"
 #include "font.h"
 #include "renderer.h"
+#include <string.h>
 
 component_t gui_text_create(text_t *text, int16_t x, int16_t y, int16_t w,
                             int16_t h) {
@@ -21,8 +22,36 @@ component_t gui_text_create(text_t *text, int16_t x, int16_t y, int16_t w,
 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);
+    text_t *state = (text_t *)component->state;
+    uint16_t line_height = state->font->size + state->font->line_spacing;
+    uint16_t lines_fit = component->height / line_height;
+
+    if (lines_fit == 0) {
+      lines_fit = 1;
+    }
+
+    int32_t remaining = strlen(state->line);
+    char *line = state->line;
+
+    int16_t y = component->y;
+
+    while (lines_fit > 0 && remaining > 0) {
+      lines_fit--;
+
+      size2d_t size = {.x = component->width, .y = line_height};
+      uint16_t fit_chars = font_fit_cut(state->font, size, line);
+      if (fit_chars == 0) {
+        fit_chars = remaining;
+      }
+
+      renderer_write_string(gui->renderer, component->x, y, fit_chars,
+                            state->font, line, state->color);
+
+      y += line_height;
+      remaining -= fit_chars;
+      line += fit_chars;
+    }
+
   }
 }
 
diff --git a/text-viewer/src/text_viewer.c b/text-viewer/src/text_viewer.c
index 4662fda..ea26d50 100644
--- a/text-viewer/src/text_viewer.c
+++ b/text-viewer/src/text_viewer.c
@@ -136,7 +136,7 @@ text_viewer_gui_add_name_and_line(text_viewer_t *text_viewer, window_t *window,
   container_t name_and_line =
       gui_group_container_create(0, 0, name_and_line_components, 2);
 
-  component_t name = gui_text_create(name_text, 5, 3, 0, 0);
+  component_t name = gui_text_create(name_text, 5, 3, text_viewer->gui.size.x, 0);
   component_t line = gui_line_create(&WHITE_PIXEL, 0, name.height + name.y,
                                      text_viewer->gui.size.x, 1);
 
-- 
2.48.1