lib: Add initial libwidget skeleton

Signed-off-by: Ian Moffett <ian@osmora.org>

6 files changed, 346 insertions, 2 deletions

diff --git a/src/lib/Makefile b/src/lib/Makefile
index 1febd2e..22017e9 100644
--- a/src/lib/Makefile
+++ b/src/lib/Makefile
@@ -2,8 +2,10 @@ LDSCRIPT=../../sys/arch/$(TARGET)/conf/user.ld
 
 .PHONY: all
 all:
-	cd libc//; LDSCRIPT=$(LDSCRIPT) CC=$(CC) ASM=$(ASM) \
-		      LD=$(ASM) SYSROOT=$(SYSROOT) make
+	cd libc/; LDSCRIPT=$(LDSCRIPT) CC=$(CC) ASM=$(ASM) \
+		LD=$(ASM) SYSROOT=$(SYSROOT) make
+	cd libwidget/; LDSCRIPT=$(LDSCRIPT) CC=$(CC) ASM=$(ASM) \
+		LD=$(ASM) SYSROOT=$(SYSROOT) make
 
 .PHONY: clean
 clean:
diff --git a/src/lib/libwidget/Makefile b/src/lib/libwidget/Makefile
new file mode 100644
index 0000000..010870f
--- /dev/null
+++ b/src/lib/libwidget/Makefile
@@ -0,0 +1,12 @@
+CFILES = $(shell find src/ -name "*.c")
+OBJECTS = $(CFILES:.c=.o)
+CFLAGS = -pedantic -Iinclude/ -L../libc/ -lc
+CC = gcc
+LIB_OUT = libwidget.a
+
+.PHONY: all
+all: $(OBJECTS)
+	ar rcs $(LIB_OUT) $(OBJECTS)
+
+%.o: %.c
+	$(CC) -c -I$(CFLAGS) $< -o $@
diff --git a/src/lib/libwidget/include/libwidget/core.h b/src/lib/libwidget/include/libwidget/core.h
new file mode 100644
index 0000000..b02ac99
--- /dev/null
+++ b/src/lib/libwidget/include/libwidget/core.h
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LIBWIDGET_CORE_H
+#define LIBWIDGET_CORE_H 1
+
+#include <stdint.h>
+
+/* Forward declarations */
+struct widget;
+
+typedef enum {
+    WIDGET_WINDOW,
+    MAX_WIDGETS
+} widget_type_t;
+
+/*
+ * Represents the color blueprint to get
+ * or set color attributes
+ *
+ * @fg: Border color
+ * @bg: Background
+ */
+struct bp_color {
+    uint32_t fg;
+    uint32_t bg;
+};
+
+/*
+ * Represents the blueprint of a widget, describes
+ * its attributes and can be used to apply changes
+ *
+ * @x: Cartesian X position
+ * @y: Cartesian Y position
+ * @color: Color blueprint
+ */
+struct blueprint {
+    uint32_t x;
+    uint32_t y;
+    struct bp_color color;
+};
+
+/*
+ * Widget operations, what can be done on
+ * a widget
+ *
+ * @init: Called upon start up
+ * @draw: Draw the widget
+ */
+struct widget_ops {
+    int(*init)(struct widget *wp);
+    int(*draw)(struct widget *wp);
+};
+
+/*
+ * Describes a widget
+ *
+ * @ops: Widget operations
+ * @type: Widget type
+ * @bp: Widget blueprint
+ * @leaf_count: Number of children
+ * @data: Widget specific data
+ */
+struct widget {
+    struct widget_ops *ops;
+    widget_type_t type;
+    struct blueprint bp;
+    uint16_t leaf_count;
+    void *data;
+};
+
+/*
+ * Initialize a widget
+ *
+ * @wp: Widget to initialize
+ * @type: Widget type
+ * @bp: Blueprint to apply upon init [NULL for default]
+ *
+ * Returns zero on success, otherwise a less than zero
+ * value on failure.
+ */
+int widget_init(struct widget *wp, widget_type_t type, struct blueprint *bp);
+
+/*
+ * Draw a widget onto the screen
+ *
+ * @wp: Widget to draw onto the screen
+ *
+ * Returns zero on success, otherwise a less than zero
+ * value on failure.
+ */
+int widget_update(struct widget *wp);
+
+#endif  /* LIBWIDGET_CORE_H */
diff --git a/src/lib/libwidget/include/libwidget/window.h b/src/lib/libwidget/include/libwidget/window.h
new file mode 100644
index 0000000..2dc58b1
--- /dev/null
+++ b/src/lib/libwidget/include/libwidget/window.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LIBWIDGET_WINDOW_H
+#define LIBWIDGET_WINDOW_H
+
+#include <libwidget/core.h>
+
+/*
+ * Represents a window widget
+ *
+ * @p: Widget pointer
+ */
+struct window {
+    struct widget *wp;
+};
+
+extern struct widget_ops g_winops;
+
+#endif  /* !LIBWIDGET_WINDOW_H */
diff --git a/src/lib/libwidget/src/core/parts/window.c b/src/lib/libwidget/src/core/parts/window.c
new file mode 100644
index 0000000..7425407
--- /dev/null
+++ b/src/lib/libwidget/src/core/parts/window.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <errno.h>
+#include <stddef.h>
+#include <libwidget/window.h>
+#include <libwidget/core.h>
+
+#define WINDOW_MAX 2
+
+static struct window windows[WINDOW_MAX];
+static uint8_t next_window = 0;
+
+/*
+ * Initialize a window
+ *
+ * TODO: We do not have a malloc so we are doing a hack
+ *       and using a window array, change this when we can
+ */
+static int
+window_init(struct widget *wp)
+{
+    struct window *win;
+
+    if (next_window >= sizeof(WINDOW_MAX)) {
+        return -1;
+    }
+
+    win = &windows[next_window++];
+    wp->data = win;
+    return 0;
+}
+
+static int
+window_draw(struct widget *wp)
+{
+    if (wp == NULL) {
+        return -EINVAL;
+    }
+
+    return 0;
+}
+
+struct widget_ops g_winops = {
+    .init = window_init,
+    .draw = window_draw
+};
diff --git a/src/lib/libwidget/src/core/widget_core.c b/src/lib/libwidget/src/core/widget_core.c
new file mode 100644
index 0000000..22f6269
--- /dev/null
+++ b/src/lib/libwidget/src/core/widget_core.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and L5 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include <libwidget/window.h>
+#include <libwidget/core.h>
+
+static struct widget backends[];
+
+/*
+ * Put the widget into a known state
+ */
+int
+widget_init(struct widget *wp, widget_type_t type, struct blueprint *bp)
+{
+    struct blueprint *bp_dest;
+    struct bp_color *color;
+    struct widget *backend;
+    struct widget_ops *ops;
+
+    if (wp == NULL) {
+        return -EINVAL;
+    }
+
+    if (type >= MAX_WIDGETS) {
+        return -EINVAL;
+    }
+
+    /* Put in a known state */
+    memset(wp, 0, sizeof(*wp));
+
+    /* Set the default color */
+    bp_dest = &wp->bp;
+    color = &bp_dest->color;
+    color->bg = 0x282828;
+    color->fg = 0xA89984;
+
+    if (bp != NULL) {
+        bp_dest->x = bp->x;
+        bp_dest->y = bp->y;
+        memcpy(bp_dest, bp, sizeof(wp->bp));
+    }
+
+    /* Get the backend and call init */
+    backend = &backends[type];
+    ops = backend->ops;
+    return ops->init(wp);
+}
+
+int
+widget_update(struct widget *wp)
+{
+    struct widget_ops *ops;
+
+    ops = wp->ops;
+    return ops->draw(wp);
+}
+
+static struct widget backends[] = {
+    [WIDGET_WINDOW] = { .ops = &g_winops }
+};