[PATCH v2 1/3] commands: edit: factor out getwinsize and export it for reuse
Ahmad Fatoum
a.fatoum at pengutronix.de
Mon Jul 1 03:35:12 PDT 2024
This function is currently only used by the sedit command, but can be
useful for other "full-screen" commands as well.
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
v1 -> v2:
- no change
---
commands/edit.c | 85 +++++++------------------------------------------
include/term.h | 8 +++++
lib/Makefile | 1 +
lib/term.c | 69 +++++++++++++++++++++++++++++++++++++++
4 files changed, 90 insertions(+), 73 deletions(-)
create mode 100644 include/term.h
create mode 100644 lib/term.c
diff --git a/commands/edit.c b/commands/edit.c
index dea383aae7a6..893fa0271d83 100644
--- a/commands/edit.c
+++ b/commands/edit.c
@@ -13,6 +13,7 @@
#include <xfuncs.h>
#include <linux/stat.h>
#include <console.h>
+#include <term.h>
#define TABSPACE 8
@@ -40,11 +41,6 @@ static struct line *curline; /* line where the cursor is */
static struct line *scrline; /* the first line on screen */
static int scrcol = 0; /* the first column on screen */
-static void pos(int x, int y)
-{
- printf("\x1b[%d;%dH", y + 2, x + 1);
-}
-
static char *screenline(char *line, int *pos)
{
int i, outpos = 0;
@@ -95,10 +91,10 @@ static int setpos(char *line, int position)
static void refresh_line(struct line *line, int ypos)
{
char *str = screenline(line->data, NULL) + scrcol;
- pos(0, ypos);
+ term_setpos(0, ypos);
str[screenwidth] = 0;
printf("%s\x1b[K", str);
- pos(cursx, cursy);
+ term_setpos(cursx, cursy);
}
/*
@@ -119,7 +115,7 @@ static void refresh(int full)
if (scrline->next == lastscrline) {
printf("\x1b[1T");
refresh_line(scrline, 0);
- pos(0, screenheight);
+ term_setpos(0, screenheight);
printf("%*s", screenwidth, "");
return;
}
@@ -149,7 +145,7 @@ static void refresh(int full)
i++;
while (i < screenheight) {
- pos(0, i++);
+ term_setpos(0, i++);
printf("~");
}
}
@@ -346,68 +342,11 @@ static void merge_line(struct line *line)
#define ESC "\033"
-static void getwinsize(void)
-{
- int n;
- char *endp;
- struct console_device *cdev;
- const char esc[] = ESC "7" ESC "[r" ESC "[999;999H" ESC "[6n";
- char buf[64];
-
- screenwidth = screenheight = 256;
-
- for_each_console(cdev) {
- int width, height;
- uint64_t start;
-
- if (!(cdev->f_active & CONSOLE_STDIN))
- continue;
- if (!(cdev->f_active & CONSOLE_STDOUT))
- continue;
-
- memset(buf, 0, sizeof(buf));
-
- cdev->puts(cdev, esc, sizeof(esc));
-
- n = 0;
-
- start = get_time_ns();
-
- while (1) {
- if (is_timeout(start, 100 * MSECOND))
- break;
-
- if (!cdev->tstc(cdev))
- continue;
-
- buf[n] = cdev->getc(cdev);
-
- if (buf[n] == 'R')
- break;
-
- n++;
- }
-
- if (buf[0] != 27)
- continue;
- if (buf[1] != '[')
- continue;
-
- height = simple_strtoul(buf + 2, &endp, 10);
- width = simple_strtoul(endp + 1, NULL, 10);
-
- screenwidth = min(screenwidth, width);
- screenheight = min(screenheight, height);
- }
-
- pos(0, 0);
-}
-
static void statusbar(const char *str)
{
- pos(0, screenheight+1);
+ term_setpos(0, screenheight+1);
printf("%*c\r%s", screenwidth, ' ', str);
- pos(cursx, cursy);
+ term_setpos(cursx, cursy);
}
static int read_modal_key(bool is_modal)
@@ -563,7 +502,7 @@ static int do_edit(int argc, char *argv[])
/* check if we are not called as "edit" */
if (*argv[0] != 'e') {
smartscroll = 1;
- getwinsize();
+ term_getsize(&screenwidth, &screenheight);
/* check if we are called as "vi" */
if (*argv[0] == 'v')
@@ -597,12 +536,12 @@ static int do_edit(int argc, char *argv[])
printf("\x1b[2J");
- pos(0, -1);
+ term_setpos(0, -1);
if (is_vi) {
screenheight -= 2;
printf("\x1b[7m%*c\x1b[0m", screenwidth , ' ');
- pos(0, screenheight-1);
+ term_setpos(0, screenheight-1);
printf("\x1b[7m%*c\x1b[0m", screenwidth , ' ');
printf("\r\x1b[7m%-25s\x1b[0m", argv[1]);
} else {
@@ -613,7 +552,7 @@ static int do_edit(int argc, char *argv[])
if (smartscroll)
printf("\x1b[2;%dr", screenheight);
- pos(0, 0);
+ term_setpos(0, 0);
screenheight--; /* status line */
@@ -652,7 +591,7 @@ static int do_edit(int argc, char *argv[])
lastscrcol = scrcol;
lastscrline = scrline;
- pos(cursx, cursy);
+ term_setpos(cursx, cursy);
again:
c = read_modal_key(is_vi);
diff --git a/include/term.h b/include/term.h
new file mode 100644
index 000000000000..097f84681d49
--- /dev/null
+++ b/include/term.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __TERM_H
+#define __TERM_H
+
+void term_setpos(int x, int y);
+void term_getsize(int *screenwidth, int *screenheight);
+
+#endif /* __LIBBB_H */
diff --git a/lib/Makefile b/lib/Makefile
index 54866f59cc05..0dde52527f41 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y += bcd.o
+obj-y += term.o
obj-$(CONFIG_BOOTSTRAP) += bootstrap/
obj-pbl-y += ctype.o
obj-y += rbtree.o
diff --git a/lib/term.c b/lib/term.c
new file mode 100644
index 000000000000..64dd5e430478
--- /dev/null
+++ b/lib/term.c
@@ -0,0 +1,69 @@
+#include <console.h>
+#include <term.h>
+
+void term_setpos(int x, int y)
+{
+ printf("\x1b[%d;%dH", y + 2, x + 1);
+}
+
+void term_getsize(int *screenwidth, int *screenheight)
+{
+ int n;
+ char *endp;
+ struct console_device *cdev;
+ const char esc[] = "\e7" "\e[r" "\e[999;999H" "\e[6n";
+ char buf[64];
+
+ if (screenwidth)
+ *screenwidth = 256;
+ if (screenheight)
+ *screenheight = 256;
+
+ for_each_console(cdev) {
+ int width, height;
+ uint64_t start;
+
+ if (!(cdev->f_active & CONSOLE_STDIN))
+ continue;
+ if (!(cdev->f_active & CONSOLE_STDOUT))
+ continue;
+
+ memset(buf, 0, sizeof(buf));
+
+ cdev->puts(cdev, esc, sizeof(esc));
+
+ n = 0;
+
+ start = get_time_ns();
+
+ while (1) {
+ if (is_timeout(start, 100 * MSECOND))
+ break;
+
+ if (!cdev->tstc(cdev))
+ continue;
+
+ buf[n] = cdev->getc(cdev);
+
+ if (buf[n] == 'R')
+ break;
+
+ n++;
+ }
+
+ if (buf[0] != 27)
+ continue;
+ if (buf[1] != '[')
+ continue;
+
+ height = simple_strtoul(buf + 2, &endp, 10);
+ width = simple_strtoul(endp + 1, NULL, 10);
+
+ if (screenwidth)
+ *screenwidth = min(*screenwidth, width);
+ if (screenheight)
+ *screenheight = min(*screenheight, height);
+ }
+
+ term_setpos(0, 0);
+}
--
2.39.2
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