Implement GUI line edit

12 files changed, 304 insertions, 0 deletions

diff --git a/res/CMakeLists.txt b/res/CMakeLists.txt
index ff4f923..d77daaf 100644
--- a/res/CMakeLists.txt
+++ b/res/CMakeLists.txt
@@ -184,6 +184,30 @@ sprite(NAME btn_mid
     CY 493
     TRANSPARENT FALSE)
 
+sprite(NAME line_edit_left
+    X 368
+    Y 148
+    BPP 4
+    CX 368
+    CY 492
+    TRANSPARENT FALSE)
+
+sprite(NAME line_edit_mid
+    X 370
+    Y 148
+    BPP 4
+    CX 368
+    CY 491
+    TRANSPARENT FALSE)
+
+sprite(NAME line_edit_right
+    X 378
+    Y 148
+    BPP 4
+    CX 368
+    CY 491
+    TRANSPARENT FALSE)
+
 sound(NAME acknowledge_01)
 sound(NAME acknowledge_02)
 sound(NAME selected_01)
@@ -213,6 +237,9 @@ container(NAME rts
         sel_down_right
         sel_mid
         sel_mid_v
+        line_edit_left
+        line_edit_mid
+        line_edit_right
     SOUNDS
         acknowledge_01
         acknowledge_02
diff --git a/res/LICENSE b/res/LICENSE
index 1c85acb..e252ace 100644
--- a/res/LICENSE
+++ b/res/LICENSE
@@ -51,6 +51,12 @@ btn_mid.bmp:
 btn_mid_24.bmp:
 btn_right.bmp:
 btn_right_24.bmp:
+line_edit_left.bmp:
+line_edit_left_24.bmp:
+line_edit_mid.bmp:
+line_edit_mid_24.bmp:
+line_edit_right.bmp:
+line_edit_right_24.bmp:
     Derived works from ui_sheet.png
 
 font.bmp:
diff --git a/res/line_edit_left.bmp b/res/line_edit_left.bmp
new file mode 100644
index 0000000..f81cac5
--- /dev/null
+++ b/res/line_edit_left.bmp
diff --git a/res/line_edit_left_24.bmp b/res/line_edit_left_24.bmp
new file mode 100644
index 0000000..f8f2b2b
--- /dev/null
+++ b/res/line_edit_left_24.bmp
diff --git a/res/line_edit_mid.bmp b/res/line_edit_mid.bmp
new file mode 100644
index 0000000..656832a
--- /dev/null
+++ b/res/line_edit_mid.bmp
diff --git a/res/line_edit_mid_24.bmp b/res/line_edit_mid_24.bmp
new file mode 100644
index 0000000..a4c7b1e
--- /dev/null
+++ b/res/line_edit_mid_24.bmp
diff --git a/res/line_edit_right.bmp b/res/line_edit_right.bmp
new file mode 100644
index 0000000..ecbc24e
--- /dev/null
+++ b/res/line_edit_right.bmp
diff --git a/res/line_edit_right_24.bmp b/res/line_edit_right_24.bmp
new file mode 100644
index 0000000..6cc59d4
--- /dev/null
+++ b/res/line_edit_right_24.bmp
diff --git a/src/game/src/res.c b/src/game/src/res.c
index c41af47..da07f96 100644
--- a/src/game/src/res.c
+++ b/src/game/src/res.c
@@ -5,6 +5,7 @@
 #include <gfx.h>
 #include <gui/bar.h>
 #include <gui/button.h>
+#include <gui/line_edit.h>
 #include <gui/rounded_rect.h>
 #include <resource.h>
 #include <terrain.h>
@@ -246,6 +247,33 @@ static const struct container c[] =
             .sprite = &gui_button_sprites[GUI_BUTTON_RIGHT]
         }
     },
+
+    {
+        .path = "line_edit_left",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data =
+        {
+            .sprite = &gui_line_edit_sprites[GUI_LINE_EDIT_LEFT]
+        }
+    },
+
+    {
+        .path = "line_edit_mid",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data =
+        {
+            .sprite = &gui_line_edit_sprites[GUI_LINE_EDIT_MID]
+        }
+    },
+
+    {
+        .path = "line_edit_right",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data =
+        {
+            .sprite = &gui_line_edit_sprites[GUI_LINE_EDIT_RIGHT]
+        }
+    }
 };
 
 static bool init;
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 6ff3a71..f96d927 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -5,6 +5,7 @@ add_library(gui
     "src/container.c"
     "src/gui.c"
     "src/label.c"
+    "src/line_edit.c"
     "src/progress_bar.c"
     "src/rounded_rect.c"
 )
diff --git a/src/gui/inc/gui/line_edit.h b/src/gui/inc/gui/line_edit.h
new file mode 100644
index 0000000..3a0f027
--- /dev/null
+++ b/src/gui/inc/gui/line_edit.h
@@ -0,0 +1,47 @@
+#ifndef GUI_LINE_EDIT_H
+#define GUI_LINE_EDIT_H
+
+#include <gui.h>
+#include <gui/label.h>
+#include <gfx.h>
+#include <util.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+struct gui_line_edit
+{
+    struct gui_common common;
+    struct gui_label label;
+    short w;
+    bool focus, blink;
+    unsigned blt;
+    char *text;
+    size_t i, sz;
+};
+
+void gui_line_edit_init(struct gui_line_edit *l, char *buf, size_t sz);
+
+UTIL_STATIC_ASSERT(!offsetof(struct gui_line_edit, common),
+    "unexpected offset for struct gui_line_edit");
+
+enum
+{
+    GUI_LINE_EDIT_LEFT,
+    GUI_LINE_EDIT_MID,
+    GUI_LINE_EDIT_RIGHT,
+
+    MAX_GUI_LINE_EDIT_SPRITES
+};
+
+extern struct sprite gui_line_edit_sprites[MAX_GUI_LINE_EDIT_SPRITES];
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GUI_LINE_EDIT_H */
diff --git a/src/gui/src/line_edit.c b/src/gui/src/line_edit.c
new file mode 100644
index 0000000..a5c01a7
--- /dev/null
+++ b/src/gui/src/line_edit.c
@@ -0,0 +1,195 @@
+#include <gui.h>
+#include <gui_private.h>
+#include <gui/label.h>
+#include <gui/line_edit.h>
+#include <camera.h>
+#include <gfx.h>
+#include <input.h>
+#include <mouse.h>
+#include <pad.h>
+#include <peripheral.h>
+#include <string.h>
+
+struct sprite gui_line_edit_sprites[MAX_GUI_LINE_EDIT_SPRITES];
+
+/* Alias for readability. */
+static const struct sprite *const refs = gui_line_edit_sprites;
+
+static int render_left(const struct gui_line_edit *const l,
+    short *const x, const short y)
+{
+    sprite_get_or_ret(s, -1);
+
+    if (sprite_clone(&refs[GUI_LINE_EDIT_LEFT], s))
+        return -1;
+
+    s->x = *x;
+    s->y = y;
+    sprite_sort(s);
+    *x = s->x + s->w;
+    return 0;
+}
+
+static int render_mid(const struct gui_line_edit *const l,
+    short *const x, const short y)
+{
+    const short mid_w = refs[GUI_LINE_EDIT_MID].w,
+        lw = refs[GUI_LINE_EDIT_LEFT].w,
+        rw = refs[GUI_LINE_EDIT_RIGHT].w,
+        w = l->w - lw - rw;
+
+    if (w > 0)
+    {
+        const short rem_mid = w > 0 ? w % mid_w : 0,
+            whole_mid = w / mid_w,
+            n_mid = rem_mid ? whole_mid + 1 : whole_mid;
+
+        for (struct
+            {
+                size_t i;
+                short x;
+            } a = {.x = lw};
+            a.i < n_mid;
+            a.i++, a.x += mid_w)
+        {
+            sprite_get_or_ret(m, -1);
+
+            if (sprite_clone(&refs[GUI_LINE_EDIT_MID], m))
+                return -1;
+
+            m->x = *x;
+            m->y = y;
+
+            if (rem_mid && a.i + 1 == n_mid)
+                m->w = rem_mid;
+            else
+                m->w = mid_w;
+
+            sprite_sort(m);
+            *x += m->w;
+        }
+    }
+    else
+        return -1;
+
+    return 0;
+}
+
+static int render_right(const short x, const short y)
+{
+    sprite_get_or_ret(s, -1);
+
+    if (sprite_clone(&refs[GUI_LINE_EDIT_RIGHT], s))
+        return -1;
+
+    s->x = x;
+    s->y = y;
+    sprite_sort(s);
+    return 0;
+}
+
+static int render(const struct gui_common *const g)
+{
+    const struct gui_line_edit *const l = (const struct gui_line_edit *)g;
+    short x, y;
+
+    gui_coords(&l->common, &x, &y);
+
+    if (render_left(l, &x, y)
+        || render_mid(l, &x, y)
+        || render_right(x, y))
+        return -1;
+
+    return 0;
+}
+
+static void get_dim(const struct gui_common *const g,
+    short *const w, short *const h)
+{
+    struct gui_line_edit *const l = (struct gui_line_edit *)g;
+
+    *w = l->w;
+    *h = refs->h;
+}
+
+static void on_char(const char ch, void *const user)
+{
+    struct gui_line_edit *const l = user;
+
+    if (l->i + 1 < l->sz)
+        l->text[l->i++] = ch;
+}
+
+static void on_erase(void *const user)
+{
+    struct gui_line_edit *const l = user;
+
+    if (l->i)
+        l->text[--l->i] = '\0';
+}
+
+static int update(struct gui_common *const g,
+    const union peripheral *const p, const struct camera *const c,
+    struct input *const in)
+{
+    struct gui_line_edit *const l = (struct gui_line_edit *)g;
+
+    if (gui_pressed(&l->common, in, p, c, l->w, refs->h))
+    {
+        l->focus = true;
+
+        *in = (const struct input)
+        {
+            .cb = on_char,
+            .erase = on_erase,
+            .user = l
+        };
+    }
+    else if (l->focus && gui_released(&l->common, p, c, l->w, refs->h))
+    {
+        l->focus = false;
+
+        if (in->user == l)
+            *in = (const struct input){0};
+    }
+
+    return 0;
+}
+
+static void deinit(struct gui_common *const g, struct input *const in)
+{
+    struct gui_line_edit *const l = (struct gui_line_edit *)g;
+
+    if (l->focus)
+        *in = (const struct input){0};
+}
+
+void gui_line_edit_init(struct gui_line_edit *const l, char *const buf,
+    const size_t sz)
+{
+    static const struct gui_common_cb cb =
+    {
+        .get_dim = get_dim,
+        .update = update,
+        .render = render,
+        .deinit = deinit
+    };
+
+    *l = (const struct gui_line_edit)
+    {
+        .common =
+        {
+            .cb = &cb
+        },
+
+        .text = buf,
+        .sz = sz
+    };
+
+    gui_label_init(&l->label);
+    memset(l->text, '\0', l->sz);
+    l->label.common.hcentered = true;
+    l->label.common.vcentered = true;
+    l->label.text = l->text;
+    gui_add_child(&l->common, &l->label.common);
+}