Add new module ui.c which is responsible to render
different kinds of UI widgets - tables, etc.
Implemented generic API for print table-like list of elements.
This table API might be used for print flows in curses or text mode.
Signed-off-by: Vadim Kochan <vadi...@gmail.com>
---
ui.c | 142 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ui.h | 53 +++++++++++++++++++++++++
2 files changed, 195 insertions(+)
create mode 100644 ui.c
create mode 100644 ui.h
diff --git a/ui.c b/ui.c
new file mode 100644
index 0000000..d5fe1a7
--- /dev/null
+++ b/ui.c
@@ -0,0 +1,142 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Subject to the GPL, version 2.
+ */
+
+#include "ui.h"
+#include "xmalloc.h"
+
+#include <curses.h>
+
+void ui_table_init(struct ui_table *tbl)
+{
+ memset(tbl, 0, sizeof(*tbl));
+
+ getsyx(tbl->y, tbl->x);
+
+ tbl->rows_y = tbl->y;
+ tbl->width = COLS;
+ tbl->col_pad = 1;
+
+ INIT_LIST_HEAD(&tbl->cols);
+}
+
+void ui_table_uninit(struct ui_table *tbl)
+{
+ struct ui_col *col, *tmp;
+
+ list_for_each_entry_safe(col, tmp, &tbl->cols, entry)
+ xfree(col);
+}
+
+void ui_table_pos_set(struct ui_table *tbl, int y, int x)
+{
+ tbl->y = y;
+ tbl->x = x;
+ tbl->rows_y = y;
+}
+
+static struct ui_col *ui_table_col_get(struct ui_table *tbl, uint32_t id)
+{
+ struct ui_col *col;
+
+ list_for_each_entry(col, &tbl->cols, entry) {
+ if (col->id == id)
+ return col;
+ }
+
+ /* Should not happen in normal case */
+ panic("Invalid column id %u\n", id);
+}
+
+static void __ui_table_pos_update(struct ui_table *tbl)
+{
+ struct ui_col *col;
+ uint32_t pos = tbl->x;
+
+ list_for_each_entry(col, &tbl->cols, entry) {
+ col->pos = pos;
+ pos += col->len + tbl->col_pad;
+ }
+}
+
+void ui_table_col_add(struct ui_table *tbl, uint32_t id, char *name, uint32_t
len)
+{
+ struct ui_col *col = xzmalloc(sizeof(*col));
+
+ col->id = id;
+ col->name = name;
+ col->len = len;
+ col->align = UI_ALIGN_LEFT;
+
+ list_add_tail(&col->entry, &tbl->cols);
+
+ __ui_table_pos_update(tbl);
+}
+
+void ui_table_col_color_set(struct ui_table *tbl, int col_id, int color)
+{
+ struct ui_col *col = ui_table_col_get(tbl, col_id);
+
+ col->color = color;
+}
+
+void ui_table_col_align_set(struct ui_table *tbl, int col_id, enum ui_align
align)
+{
+ struct ui_col *col = ui_table_col_get(tbl, col_id);
+
+ col->align = align;
+}
+
+void ui_table_row_add(struct ui_table *tbl)
+{
+ tbl->rows_y++;
+}
+
+void ui_table_clear(struct ui_table *tbl)
+{
+ tbl->rows_y = tbl->y;
+}
+
+#define UI_ALIGN_COL(col) (((col)->align == UI_ALIGN_LEFT) ? "%-*.*s" :
"%*.*s")
+
+static void __ui_table_row_print(struct ui_table *tbl, struct ui_col *col,
+ const char *str)
+{
+ mvprintw(tbl->rows_y, col->pos, UI_ALIGN_COL(col), col->len, col->len,
str);
+ mvprintw(tbl->rows_y, col->pos + col->len, "%*s", tbl->col_pad, " ");
+}
+
+void ui_table_row_print(struct ui_table *tbl, uint32_t col_id, const char *str)
+{
+ struct ui_col *col = ui_table_col_get(tbl, col_id);
+
+ attron(col->color);
+ __ui_table_row_print(tbl, col, str);
+ attroff(col->color);
+}
+
+void ui_table_header_color_set(struct ui_table *tbl, int color)
+{
+ tbl->hdr_color = color;
+}
+
+void ui_table_header_print(struct ui_table *tbl)
+{
+ struct ui_col *col;
+ int max_width = tbl->width;
+ int width = 0;
+
+ attron(tbl->hdr_color);
+
+ mvprintw(tbl->y, tbl->x, "%-*.*s", max_width - tbl->x, max_width -
tbl->x, "");
+ mvprintw(tbl->y, tbl->x, "");
+
+ list_for_each_entry(col, &tbl->cols, entry) {
+ __ui_table_row_print(tbl, col, col->name);
+ width += col->len + tbl->col_pad;
+ }
+
+ mvprintw(tbl->y, width, "%*s", max_width - width, " ");
+ attroff(tbl->hdr_color);
+}
diff --git a/ui.h b/ui.h
new file mode 100644
index 0000000..02d1da2
--- /dev/null
+++ b/ui.h
@@ -0,0 +1,53 @@
+#ifndef UI_H
+#define UI_H
+
+#include "list.h"
+
+#include <stdbool.h>
+#include <inttypes.h>
+
+#define UI_MAX_WIDTH (-1)
+
+enum ui_align {
+ UI_ALIGN_LEFT,
+ UI_ALIGN_RIGHT,
+};
+
+struct ui_col {
+ struct list_head entry;
+ uint32_t id;
+ char *name;
+ uint32_t len;
+ int pos;
+ int color;
+ enum ui_align align;
+};
+
+struct ui_table {
+ int y;
+ int x;
+ int rows_y;
+ struct list_head cols;
+ int hdr_color;
+ int col_pad;
+ int width;
+};
+
+extern void ui_table_init(struct ui_table *tbl);
+extern void ui_table_uninit(struct ui_table *tbl);
+extern void ui_table_pos_set(struct ui_table *tbl, int y, int x);
+extern void ui_table_clear(struct ui_table *tbl);
+
+extern void ui_table_col_add(struct ui_table *tbl, uint32_t id, char *name,
+ uint32_t len);
+extern void ui_table_col_color_set(struct ui_table *tbl, int col_id, int
color);
+extern void ui_table_col_align_set(struct ui_table *tbl, int col_id, enum
ui_align align);
+
+extern void ui_table_row_add(struct ui_table *tbl);
+extern void ui_table_row_print(struct ui_table *tbl, uint32_t col_id,
+ const char *str);
+
+extern void ui_table_header_color_set(struct ui_table *tbl, int color);
+extern void ui_table_header_print(struct ui_table *tbl);
+
+#endif /* UI_H */
--
2.6.3
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