5 files changed, 77 insertions, 0 deletions

diff --git a/teensy/platform/gl/gl.c b/teensy/platform/gl/gl.c
index c6b8194..9f9c8f5 100644
--- a/teensy/platform/gl/gl.c
+++ b/teensy/platform/gl/gl.c
@@ -43,11 +43,18 @@ typedef struct {
     GLuint program;
     GLint uniform_tex_loc;
     GLuint screen_handle;
+    uint32_t typed;
 } Gl_Platform;
 
 Gl_Platform p;
 
 static
+void character_callback(GLFWwindow *window, unsigned int cp)
+{
+    p.typed = cp;
+}
+
+static
 GLuint compile_shader(GLenum type, const char *src)
 {
     GLuint shader = glCreateShader(type);
@@ -88,6 +95,8 @@ void ty_platform_init(ty_Ctx *ctx)
 
     glfwMakeContextCurrent(p.win);
 
+    glfwSetCharCallback(p.win, character_callback);
+
     ty_log_info("initializing GLAD...");
     if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
         ty_log_fatal(TY_PLATFORM_ERR, "could not init GLAD");
@@ -248,6 +257,7 @@ bool ty_platform_is_button_down(ty_Button btn)
     case TY_BTN_ACTION_4:    res = glfwGetKey(p.win, GLFW_KEY_O); break;
     case TY_BTN_DB_CTRL:     res = glfwGetKey(p.win, GLFW_KEY_LEFT_CONTROL); break;
     case TY_BTN_DB_SHIFT:    res = glfwGetKey(p.win, GLFW_KEY_LEFT_SHIFT); break;
+    case TY_BTN_DB_BKSPACE:  res = glfwGetKey(p.win, GLFW_KEY_BACKSPACE); break;
     case TY_BTN_DB_LMB: 
         res = glfwGetMouseButton(p.win, GLFW_MOUSE_BUTTON_LEFT);
         break;
@@ -261,3 +271,12 @@ bool ty_platform_is_button_down(ty_Button btn)
 
     return res == GLFW_PRESS;
 }
+
+bool ty_platform_get_typed_char(uint32_t *c)
+{
+    assert(c);
+    *c = p.typed;
+    if (p.typed == 0)
+        return false;
+    p.typed = 0;
+}
diff --git a/teensy/teensy.h b/teensy/teensy.h
index 80f9a71..c909c52 100644
--- a/teensy/teensy.h
+++ b/teensy/teensy.h
@@ -58,6 +58,7 @@ enum {
 
     TY_BTN_DB_CTRL,
     TY_BTN_DB_SHIFT,
+    TY_BTN_DB_BKSPACE,
     TY_BTN_DB_LMB,
     TY_BTN_DB_RMB,
     TY_BTN_DB_MMB,
diff --git a/teensy/teensy_platform.h b/teensy/teensy_platform.h
index 5301385..8a1daa6 100644
--- a/teensy/teensy_platform.h
+++ b/teensy/teensy_platform.h
@@ -15,5 +15,6 @@ bool ty_platform_is_button_down(ty_Button btn);
 
 // Optional, no editor if not implemented
 ty_Vec2i ty_platform_get_mouse(void);
+bool ty_platform_get_typed_char(uint32_t *c);
 
 #endif // TEENSY_PLATFORM_H_
diff --git a/teensy/teensy_ui.c b/teensy/teensy_ui.c
index 86b2c94..d055802 100644
--- a/teensy/teensy_ui.c
+++ b/teensy/teensy_ui.c
@@ -6,6 +6,7 @@
 #include <string.h>
  
 #include "teensy_list.h"
+#include "teensy_platform.h"
 
 #define TEXT_HEIGHT (8)
 #define MAX_LAYOUTS (16)
@@ -72,6 +73,8 @@ typedef struct {
     const float *layout;
 
     ty_Vec2i prev_mouse_pos;
+
+    const tyui_Text_Input *focused_text_box;
 } Ctx;
 
 static
@@ -512,6 +515,53 @@ void tyui_slider_ex(
     }
 }
 
+void tyui_text_input(tyui_Text_Input *input)
+{
+    // ASSUMES ASCII
+
+    ty_Recti rect = next_rect(TEXT_HEIGHT + control_padding() * 2);
+
+    size_t len = strlen(input->chars);
+    uint32_t c;
+
+    bool focused = input == uictx.focused_text_box;
+    bool hovered = is_hovered(rect);
+
+    if (!focused && hovered && window()->lmb_pressed) {
+        uictx.focused_text_box = input;
+        focused = true;
+    } else if (focused && !hovered && window()->lmb_pressed) {
+        uictx.focused_text_box = NULL;
+        focused = false;
+    }
+
+    if (focused) {
+        if (len < input->max_len - 1 && ty_platform_get_typed_char(&c)) {
+            input->chars[len] = c < CHAR_MAX ? (char)c : 'x';
+            input->chars[len + 1] = '\0';
+        }
+
+        if (ty_button_pressed(TY_BTN_DB_BKSPACE))
+            input->chars[len - 1] = '\0';
+    }
+
+    draw_frame(rect, uictx.style.bg_normal);
+
+    ty_Recti text_rect = ty_recti_shrink(rect, control_padding());
+    int text_width = ty_font_width(uictx.font, input->chars);
+    text_rect.w = fmin(text_rect.w, text_width);
+    text_cmd(
+        input->chars,
+        text_rect,
+        focused ? TYUI_ALIGN_RIGHT : TYUI_ALIGN_LEFT
+    );
+    if (focused && (int)(ty_get_time() * 2) % 2 == 0) {
+        text_rect.x += fmin(text_width, text_rect.w - 1);
+        text_rect.w = 1;
+        rect_cmd(text_rect, uictx.style.fg_normal);
+    }
+}
+
 static
 void draw_window(Window *win)
 {
diff --git a/teensy/teensy_ui.h b/teensy/teensy_ui.h
index 1e97376..5ceda30 100644
--- a/teensy/teensy_ui.h
+++ b/teensy/teensy_ui.h
@@ -68,6 +68,11 @@ typedef struct {
     uint32_t flags;
 } tyui_Window_Conf;
 
+typedef struct {
+    char *chars;
+    int max_len;
+} tyui_Text_Input;
+
 void tyui_init(const ty_Font *font);
 void tyui_deinit(void);
 
@@ -96,6 +101,7 @@ void tyui_slider_ex(
     bool show_value,
     tyui_Align value_align
 );
+void tyui_text_input(tyui_Text_Input *input);
 
 // Draws all accumulated draw commands and initializes the next frame.
 void tyui_draw(void);