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editor: Load a file if specified on command line

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Add support for basic text file loading, to facilitate more expansive
testing of its UTF-8 text editing support.

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
This commit is contained in:
Bryce Harrington 2016-11-21 13:26:23 -08:00
parent 3d90da21fe
commit 411ffabbb5
1 changed files with 63 additions and 5 deletions
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64
clients/editor.c
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@ -25,6 +25,7 @@
#include "config.h"
#include <assert.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
@ -1513,7 +1514,7 @@ usage(const char *program_name, int exit_code)
{
unsigned k;
fprintf(stderr, "Usage: %s [OPTIONS]\n\n", program_name);
fprintf(stderr, "Usage: %s [OPTIONS] [FILENAME]\n\n", program_name);
for (k = 0; k < ARRAY_LENGTH(editor_options); k++) {
const struct weston_option *p = &editor_options[k];
if (p->name) {
@ -1532,10 +1533,58 @@ usage(const char *program_name, int exit_code)
exit(exit_code);
}
/* Load the contents of a file into a UTF-8 text buffer and return it.
*
* Caller is responsible for freeing the buffer when done.
* On error, returns NULL.
*/
static char *
read_file(char *filename)
{
char *buffer = NULL;
int buf_size, read_size;
FILE *fin;
int errsv;
fin = fopen(filename, "r");
if (fin == NULL)
goto error;
/* Determine required buffer size */
if (fseek(fin, 0, SEEK_END) != 0)
goto error;
buf_size = ftell(fin);
if (buf_size < 0)
goto error;
rewind(fin);
/* Create buffer and read in the text */
buffer = (char*) malloc(sizeof(char) * (buf_size + 1));
if (buffer == NULL)
goto error;
read_size = fread(buffer, sizeof(char), buf_size, fin);
fclose(fin);
if (buf_size != read_size)
goto error;
buffer[buf_size] = '\0';
return buffer;
error:
errsv = errno;
if (fin)
fclose(fin);
free(buffer);
errno = errsv || EINVAL;
return NULL;
}
int
main(int argc, char *argv[])
{
struct editor editor;
char *text_buffer = NULL;
parse_options(editor_options, ARRAY_LENGTH(editor_options),
&argc, argv);
@ -1543,9 +1592,14 @@ main(int argc, char *argv[])
usage(argv[0], EXIT_SUCCESS);
if (argc > 1) {
if (argv[1][0] == '-')
usage(argv[0], EXIT_FAILURE);
/* FIXME: Use remaining arguments as a path/filename to load */
return 0;
text_buffer = read_file(argv[1]);
if (text_buffer == NULL) {
fprintf(stderr, "could not read file '%s': %m\n", argv[1]);
return -1;
}
}
memset(&editor, 0, sizeof editor);
@ -1571,6 +1625,9 @@ main(int argc, char *argv[])
editor.window = window_create(editor.display);
editor.widget = window_frame_create(editor.window, &editor);
if (text_buffer)
editor.entry = text_entry_create(&editor, text_buffer);
else
editor.entry = text_entry_create(&editor, "Entry");
editor.entry->click_to_show = opt_click_to_show;
if (opt_preferred_language)
@ -1605,6 +1662,7 @@ main(int argc, char *argv[])
widget_destroy(editor.widget);
window_destroy(editor.window);
display_destroy(editor.display);
free(text_buffer);
return 0;
}