incomplete textregion library

base/usr/include/toaru/textregion.h

@@ -0,0 +1,88 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <toaru/hashmap.h>
+#include <toaru/graphics.h>
+
+struct TR_Font {
+	int typeface; /* Should probably be more flexible than int, but tough luck for now. */
+	int size;
+	uint32_t color;
+	/* TODO shadow - we had built-in support for this in the old setup, not sure I want to do it here */
+};
+
+/* TODO This should probably all use wchar_t, but the font library needs to support that as well. */
+
+extern int tr_font_get_width(struct TR_Font * font, char * string);
+extern int tr_font_write(struct TR_Font * font, gfx_context_t * ctx, int x, int y, char * string);
+
+struct TR_TextUnit {
+	char * string;
+	int unit_type;
+	int width; /* calculated on creation */
+
+	struct TR_Font * font; /* not a pointer */
+	hashmap_t * extra; /* extra properties in hashmap if present */
+	list_t * tag_group; /* tag group membership if present */
+};
+
+extern void tr_textunit_set_tag_group(struct TR_TextUnit * self, list_t * tag_group);
+extern void tr_textunit_set_font(struct TR_TextUnit * self, struct TR_Font * font);
+extern void tr_textunit_set_extra(struct TR_TextUnit * self, char * key, void * data);
+
+struct TR_TextRegion {
+	int x;
+	int y;
+
+	int width;
+	int height;
+
+	struct TR_Font * font;
+
+	char * text;
+	list_t * lines;
+	int align;
+	int valign;
+	int line_height; /* TODO should be property of lines */
+
+	struct TR_TextUnit * text_units; /* array */
+	int scroll;
+	char * ellipsis; /* blank by default */
+	bool one_line; /* False by default */
+
+	char * base_dir; /* Used for links and images */
+	bool break_all; /* False by default */
+	char * title; /* blank by default */
+	int max_lines; /* 0 is None */
+};
+
+struct TR_Offset {
+	struct TR_TextUnit * unit;
+	int line;
+	int left;
+	int right;
+	int index;
+};
+
+extern void tr_textregion_set_alignment(struct TR_TextRegion * self, int align);
+extern void tr_textregion_set_valignment(struct TR_TextRegion * self, int align);
+extern void tr_textregion_set_max_lines(struct TR_TextRegion * self, int max_lines);
+extern int tr_textregion_get_visible_lines(struct TR_TextRegion * self); /* height / line_height */
+extern void tr_textregion_reflow(struct TR_TextRegion * self);
+extern list_t * tr_textregion_units_from_text(struct TR_TextRegion * self, char * text, struct TR_Font * font, bool whitespace);
+
+extern void tr_textregion_set_one_line(struct TR_TextRegion * self, bool one_line);
+extern void tr_textregion_set_ellipsis(struct TR_TextRegion * self, char * ellipsis);
+extern void tr_textregion_set_text(struct TR_TextRegion* self, char * text);
+extern void tr_textregion_set_font(struct TR_TextRegion* self, struct TR_Font * font);
+extern void tr_textregion_set_line_height(struct TR_TextRegion * self, int line_height);
+extern void tr_textregion_resize(struct TR_TextRegion * self, int width, int height);
+extern void tr_textregion_move(struct TR_TextRegion * self, int x, int y);
+
+extern void tr_textregion_get_offset_at_index(struct TR_TextRegion* self, int index, struct TR_Offset * out);
+extern void tr_textregion_pick(struct TR_TextRegion * self, int x, int y, struct TR_Offset * out);
+extern struct TR_TextUnit * tr_textregion_click(struct TR_TextRegion * self, int x, int y);
+extern void tr_textregion_draw(struct TR_TextRegion * self, gfx_context_t * ctx);
+

lib/textregion.c

@@ -0,0 +1,84 @@
+/* vim: ts=4 sw=4 noexpandtab
+ *
+ * This file is part of ToaruOS and is released under the terms
+ * of the NCSA / University of Illinois License - see LICENSE.md
+ * Copyright (C) 2018 K. Lange
+ *
+ * Port of the original ToaruOS Python text_region library to C.
+ *
+ * Allows for the display of rich text with multiple varied formats,
+ * as well as carat positioning, reflow, links, images, and so on.
+ */
+
+#include <stdio.h>
+#include <toaru/textregion.h>
+#include <toaru/sdf.h>
+
+int tr_font_get_width(struct TR_Font * font, char * string) {
+	return draw_sdf_string_width(string, font->size, font->typeface);
+}
+
+int tr_font_write(struct TR_Font * font, gfx_context_t * ctx, int x, int y, char * string) {
+	return draw_sdf_string(ctx, x, y, string, font->size, font->color, font->typeface);
+}
+
+void tr_textunit_set_tag_group(struct TR_TextUnit * self, list_t * tag_group) {
+	if (!self->tag_group) {
+		self->tag_group = tag_group;
+		list_insert(tag_group, self);
+	} else {
+		/* Already in a tag group, this is wrong */
+	}
+}
+
+void tr_textunit_set_font(struct TR_TextUnit * self, struct TR_Font * font) {
+	self->font = font;
+	self->width = tr_font_get_width(font, self->string);
+}
+
+void tr_textunit_set_extra(struct TR_TextUnit * self, char * key, void * data) {
+	if (!self->extra) {
+		self->extra = hashmap_create(10);
+	}
+	hashmap_set(self->extra, key, data);
+}
+
+void tr_textregion_set_alignment(struct TR_TextRegion * self, int align) {
+	self->align = align;
+}
+
+void tr_textregion_set_valignment(struct TR_TextRegion * self, int align) {
+	self->valign = align;
+}
+
+void tr_textregion_set_max_lines(struct TR_TextRegion * self, int max_lines) {
+	self->max_lines = max_lines;
+	tr_textregion_reflow(self);
+}
+
+int tr_textregion_get_visible_lines(struct TR_TextRegion * self) {
+	return self->height / self->line_height;
+}
+
+void tr_textregion_reflow(struct TR_TextRegion * self) {
+	if (self->lines) {
+		fprintf(stderr, "Need to clean out lines\n");
+#if 0
+		list_destroy(self->lines);
+		list_free(self->lines);
+		free(self->lines);
+#endif
+	}
+
+#if 0
+	self->lines = list_create();
+
+	int current_width = 0;
+	list_t * current_units = list_create();
+	struct TR_TextUnit * leftover = NULL;
+
+	int i = 0;
+	while (i < self->text_units
+#endif
+
+}

util/auto-dep.py

@@ -38,6 +38,7 @@ class Classifier(object):
         '<toaru/icon_cache.h>':  (None, '-ltoaru_icon_cache',  ['<toaru/graphics.h>', '<toaru/hashmap.h>']),
         '<toaru/menu.h>':        (None, '-ltoaru_menu',        ['<toaru/sdf.h>', '<toaru/yutani.h>', '<toaru/icon_cache.h>', '<toaru/graphics.h>', '<toaru/hashmap.h>']),
         '<toaru/menubar.h>':     (None, '-ltoaru_menubar',     ['<toaru/menu.h>', '<toaru/yutani.h>', '<toaru/icon_cache.h>', '<toaru/graphics.h>', '<toaru/hashmap.h>']),
+        '<toaru/textregion.h>':  (None, '-ltoaru_textregion',  ['<toaru/sdf.h>', '<toaru/yutani.h>','<toaru/graphics.h>', '<toaru/hashmap.h>']),
     }
 
     def __init__(self, filename):