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Factor buffer out of ui 

In preparation for doing line wrapping outside of ncurses.
master
C. McEnroe 2020-09-01 20:35:17 -04:00
parent a98fd70aac
commit ded2b6afb6
5 changed files with 150 additions and 56 deletions
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1
Makefile
View File

@ -7,6 +7,7 @@ LDLIBS = -lncursesw -ltls
-include config.mk
OBJS += buffer.o
OBJS += chat.o
OBJS += command.o
OBJS += complete.o

4
README.7
View File

@ -1,4 +1,4 @@
.Dd August 4, 2020
.Dd September 1, 2020
.Dt README 7
.Os "Causal Agency"
.\" To view this file, run: man ./README.7
@ -154,6 +154,8 @@ curses interface
IRC message handling
.It Pa command.c
input command handling
.It Pa buffer.c
line wrapping
.It Pa edit.c
line editing
.It Pa complete.c

103
buffer.c 100644
View File

@ -0,0 +1,103 @@
/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this Program, or any covered work, by linking or
* combining it with OpenSSL (or a modified version of that library),
* containing parts covered by the terms of the OpenSSL License and the
* original SSLeay license, the licensors of this Program grant you
* additional permission to convey the resulting work. Corresponding
* Source for a non-source form of such a combination shall include the
* source code for the parts of OpenSSL used as well as that of the
* covered work.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>
#include <time.h>
#include "chat.h"
struct Lines {
size_t len;
struct Line lines[BufferCap];
};
_Static_assert(!(BufferCap & (BufferCap - 1)), "BufferCap is power of two");
struct Buffer {
struct Lines soft;
struct Lines hard;
};
struct Buffer *bufferAlloc(void) {
struct Buffer *buffer = calloc(1, sizeof(*buffer));
if (!buffer) err(EX_OSERR, "calloc");
return buffer;
}
void bufferFree(struct Buffer *buffer) {
for (size_t i = 0; i < BufferCap; ++i) {
free(buffer->soft.lines[i].str);
free(buffer->hard.lines[i].str);
}
free(buffer);
}
static const struct Line *linesLine(const struct Lines *lines, size_t i) {
const struct Line *line = &lines->lines[(lines->len + i) % BufferCap];
return (line->str ? line : NULL);
}
const struct Line *bufferSoft(const struct Buffer *buffer, size_t i) {
return linesLine(&buffer->soft, i);
}
const struct Line *bufferHard(const struct Buffer *buffer, size_t i) {
return linesLine(&buffer->hard, i);
}
static void flow(struct Lines *hard, int cols, const struct Line *soft) {
(void)hard;
(void)cols;
(void)soft;
}
void bufferPush(
struct Buffer *buffer, int cols,
enum Heat heat, time_t time, const char *str
) {
struct Line *soft = &buffer->soft.lines[buffer->soft.len++ % BufferCap];
free(soft->str);
soft->heat = heat;
soft->time = time;
soft->str = strdup(str);
if (!soft->str) err(EX_OSERR, "strdup");
flow(&buffer->hard, cols, soft);
}
void bufferReflow(struct Buffer *buffer, int cols) {
buffer->hard.len = 0;
for (size_t i = 0; i < BufferCap; ++i) {
free(buffer->hard.lines[i].str);
buffer->hard.lines[i].str = NULL;
}
for (size_t i = 0; i < BufferCap; ++i) {
const struct Line *soft = bufferSoft(buffer, i);
if (soft) flow(&buffer->hard, cols, soft);
}
}

17
chat.h
View File

@ -276,6 +276,23 @@ void uiFormat(
void uiLoad(const char *name);
int uiSave(const char *name);
enum { BufferCap = 1024 };
struct Buffer;
struct Line {
enum Heat heat;
time_t time;
char *str;
};
struct Buffer *bufferAlloc(void);
void bufferFree(struct Buffer *buffer);
const struct Line *bufferSoft(const struct Buffer *buffer, size_t i);
const struct Line *bufferHard(const struct Buffer *buffer, size_t i);
void bufferPush(
struct Buffer *buffer, int cols,
enum Heat heat, time_t time, const char *str
);
void bufferReflow(struct Buffer *buffer, int cols);
enum Edit {
EditHead,
EditTail,

81
ui.c
View File

@ -74,34 +74,6 @@ static WINDOW *status;
static WINDOW *marker;
static WINDOW *input;
struct Line {
enum Heat heat;
time_t time;
char *str;
};
enum { BufferCap = 1024 };
struct Buffer {
size_t len;
struct Line lines[BufferCap];
};
_Static_assert(!(BufferCap & (BufferCap - 1)), "BufferCap is power of two");
static void bufferPush(
struct Buffer *buffer, enum Heat heat, time_t time, const char *str
) {
struct Line *line = &buffer->lines[buffer->len++ % BufferCap];
free(line->str);
line->heat = heat;
line->time = time;
line->str = strdup(str);
if (!line->str) err(EX_OSERR, "strdup");
}
static struct Line bufferLine(const struct Buffer *buffer, size_t i) {
return buffer->lines[(buffer->len + i) % BufferCap];
}
struct Window {
uint id;
WINDOW *pad;
@ -113,7 +85,7 @@ struct Window {
uint unreadHard;
uint unreadSoft;
uint unreadWarm;
struct Buffer buffer;
struct Buffer *buffer;
};
static struct {
@ -170,14 +142,13 @@ static uint windowFor(uint id) {
wmove(window->pad, WindowLines - 1, 0);
window->mark = true;
window->ignore = true;
window->buffer = bufferAlloc();
return windowPush(window);
}
static void windowFree(struct Window *window) {
for (size_t i = 0; i < BufferCap; ++i) {
free(window->buffer.lines[i].str);
}
bufferFree(window->buffer);
delwin(window->pad);
free(window);
}
@ -625,7 +596,7 @@ static void notify(uint id, const char *str) {
void uiWrite(uint id, enum Heat heat, const time_t *src, const char *str) {
struct Window *window = windows.ptrs[windowFor(id)];
time_t ts = (src ? *src : time(NULL));
bufferPush(&window->buffer, heat, ts, str);
bufferPush(window->buffer, COLS, heat, ts, str);
if (heat < Cold && window->ignore) return;
int lines = 0;
@ -668,15 +639,15 @@ static void reflow(struct Window *window) {
int flowed = 0;
window->unreadSoft = 0;
for (size_t i = 0; i < BufferCap; ++i) {
struct Line line = bufferLine(&window->buffer, i);
if (!line.str) continue;
if (line.heat < Cold && window->ignore) continue;
const struct Line *line = bufferSoft(window->buffer, i);
if (!line) continue;
if (line->heat < Cold && window->ignore) continue;
int lines = 0;
if (i == (size_t)(BufferCap - window->unreadHard)) {
waddch(window->pad, '\n');
lines++;
}
lines += wordWrap(window->pad, line.str);
lines += wordWrap(window->pad, line->str);
if (i >= (size_t)(BufferCap - window->unreadHard)) {
window->unreadSoft += lines;
}
@ -695,7 +666,7 @@ static void resize(void) {
getmaxyx(windows.ptrs[0]->pad, height, width);
if (width == COLS) return;
for (uint num = 0; num < windows.len; ++num) {
wresize(windows.ptrs[num]->pad, BufferCap, COLS);
wresize(windows.ptrs[num]->pad, WindowLines, COLS);
reflow(windows.ptrs[num]);
}
(void)height;
@ -707,10 +678,10 @@ static void bufferList(const struct Buffer *buffer) {
waiting = true;
for (size_t i = 0; i < BufferCap; ++i) {
struct Line line = bufferLine(buffer, i);
if (!line.str) continue;
const struct Line *line = bufferSoft(buffer, i);
if (!line) continue;
struct tm *tm = localtime(&line.time);
struct tm *tm = localtime(&line->time);
if (!tm) err(EX_OSERR, "localtime");
char buf[sizeof("00:00:00")];
@ -720,20 +691,20 @@ static void bufferList(const struct Buffer *buffer) {
bool align = false;
struct Style style = StyleDefault;
while (*line.str) {
if (*line.str == '\t') {
for (const char *str = line->str; *str;) {
if (*str == '\t') {
printf("%c", (align ? '\t' : ' '));
align = true;
line.str++;
str++;
}
size_t len = styleParse(&style, (const char **)&line.str);
size_t tab = strcspn(line.str, "\t");
size_t len = styleParse(&style, &str);
size_t tab = strcspn(str, "\t");
if (tab < len) len = tab;
vid_attr(styleAttr(style), stylePair(style), NULL);
printf("%.*s", (int)len, line.str);
line.str += len;
printf("%.*s", (int)len, str);
str += len;
}
printf("\n");
}
@ -926,7 +897,7 @@ static void keyCode(int code) {
break; case KeyMetaB: edit(id, EditPrevWord, 0);
break; case KeyMetaD: edit(id, EditDeleteNextWord, 0);
break; case KeyMetaF: edit(id, EditNextWord, 0);
break; case KeyMetaL: bufferList(&window->buffer);
break; case KeyMetaL: bufferList(window->buffer);
break; case KeyMetaM: waddch(window->pad, '\n');
break; case KeyMetaQ: edit(id, EditCollapse, 0);
break; case KeyMetaU: windowScrollUnread(window);
@ -1060,11 +1031,11 @@ int uiSave(const char *name) {
if (writeTime(file, window->unreadHard)) return -1;
if (writeTime(file, window->unreadWarm)) return -1;
for (size_t i = 0; i < BufferCap; ++i) {
struct Line line = bufferLine(&window->buffer, i);
if (!line.str) continue;
if (writeTime(file, line.time)) return -1;
if (writeTime(file, line.heat)) return -1;
if (writeString(file, line.str)) return -1;
const struct Line *line = bufferSoft(window->buffer, i);
if (!line) continue;
if (writeTime(file, line->time)) return -1;
if (writeTime(file, line->heat)) return -1;
if (writeString(file, line->str)) return -1;
}
if (writeTime(file, 0)) return -1;
}
@ -1122,7 +1093,7 @@ void uiLoad(const char *name) {
if (!time) break;
enum Heat heat = (version > 2 ? readTime(file) : Cold);
readString(file, &buf, &cap);
bufferPush(&window->buffer, heat, time, buf);
bufferPush(window->buffer, COLS, heat, time, buf);
}
reflow(window);
}