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#define SESSION_FILENAME "session.txt"
#define SESSION_VERSION "\x7fTED0002"
static void session_write_node(Ted *ted, FILE *fp, u16 node_idx) {
Node *node = &ted->nodes[node_idx];
write_u16(fp, node_idx);
bool is_split = !node->tabs;
write_bool(fp, is_split);
if (is_split) {
write_float(fp, node->split_pos);
write_bool(fp, node->split_vertical);
write_u16(fp, node->split_a);
write_u16(fp, node->split_b);
} else {
write_u16(fp, node->active_tab); // active tab
write_u16(fp, (u16)arr_len(node->tabs)); // ntabs
arr_foreach_ptr(node->tabs, u16, tab) {
write_u16(fp, *tab);
}
}
}
static void session_read_node(Ted *ted, FILE *fp) {
u16 node_idx = read_u16(fp);
if (node_idx >= TED_MAX_NODES) {
debug_println("WARNING: Invalid node index (see %s:%d)!\n", __FILE__, __LINE__);
return;
}
ted->nodes_used[node_idx] = true;
Node *node = &ted->nodes[node_idx];
bool is_split = read_bool(fp);
if (is_split) {
node->split_pos = clampf(read_float(fp), 0, 1);
node->split_vertical = read_bool(fp);
node->split_a = clamp_u16(read_u16(fp), 0, TED_MAX_NODES);
node->split_b = clamp_u16(read_u16(fp), 0, TED_MAX_NODES);
} else {
node->active_tab = read_u16(fp);
u16 ntabs = clamp_u16(read_u16(fp), 0, TED_MAX_TABS);
if (node->active_tab >= ntabs)
node->active_tab = 0;
for (u16 i = 0; i < ntabs; ++i) {
u16 buf_idx = read_u16(fp);
if (buf_idx >= TED_MAX_BUFFERS) continue;
arr_add(node->tabs, buf_idx);
}
}
}
static void session_write_buffer(Ted *ted, FILE *fp, u16 buffer_idx) {
write_u16(fp, buffer_idx);
TextBuffer *buffer = &ted->buffers[buffer_idx];
// some info about the buffer that should be restored
if (buffer->filename && !buffer_is_untitled(buffer))
write_cstr(fp, buffer->filename);
else
write_char(fp, 0);
write_double(fp, buffer->scroll_x);
write_double(fp, buffer->scroll_y);
write_bool(fp, buffer->view_only);
buffer_pos_write(buffer->cursor_pos, fp);
write_bool(fp, buffer->selection);
if (buffer->selection)
buffer_pos_write(buffer->selection_pos, fp);
}
static void session_read_buffer(Ted *ted, FILE *fp) {
u16 buffer_idx = read_u16(fp);
if (buffer_idx >= TED_MAX_BUFFERS) {
debug_println("WARNING: Invalid buffer index (see %s:%d)!\n", __FILE__, __LINE__);
return;
}
TextBuffer *buffer = &ted->buffers[buffer_idx];
ted->buffers_used[buffer_idx] = true;
char filename[TED_PATH_MAX] = {0};
read_cstr(fp, filename, sizeof filename);
buffer_create(buffer, ted);
if (!buffer_haserr(buffer)) {
if (*filename) {
if (!buffer_load_file(buffer, filename))
buffer_new_file(buffer, TED_UNTITLED);
} else {
buffer_new_file(buffer, TED_UNTITLED);
}
buffer->scroll_x = read_double(fp);
buffer->scroll_y = read_double(fp);
buffer->view_only = read_bool(fp);
buffer->cursor_pos = buffer_pos_read(buffer, fp);
buffer->selection = read_bool(fp);
if (buffer->selection)
buffer->selection_pos = buffer_pos_read(buffer, fp);
}
}
static void session_write_file(Ted *ted, FILE *fp) {
fwrite(SESSION_VERSION, 1, sizeof SESSION_VERSION, fp);
write_cstr(fp, ted->cwd);
write_u16(fp, ted->active_node ? (u16)(ted->active_node - ted->nodes) : U16_MAX); // active node idx
write_u16(fp, ted->active_buffer ? (u16)(ted->active_buffer - ted->buffers) : U16_MAX); // active buffer idx
u16 nnodes = 0;
for (u16 i = 0; i < TED_MAX_NODES; ++i)
nnodes += ted->nodes_used[i];
write_u16(fp, nnodes);
for (u16 i = 0; i < TED_MAX_NODES; ++i)
if (ted->nodes_used[i])
session_write_node(ted, fp, i);
u16 nbuffers = 0;
for (u16 i = 0; i < TED_MAX_BUFFERS; ++i)
nbuffers += ted->buffers_used[i];
write_u16(fp, nbuffers);
for (u16 i = 0; i < TED_MAX_BUFFERS; ++i)
if (ted->buffers_used[i])
session_write_buffer(ted, fp, i);
}
static void session_read_file(Ted *ted, FILE *fp) {
char version[sizeof SESSION_VERSION] = {0};
fread(version, 1, sizeof version, fp);
if (memcmp(version, SESSION_VERSION, sizeof version) != 0) {
debug_println("WARNING: Session file has wrong version (see %s:%d)!\n", __FILE__, __LINE__);
return; // wrong version
}
read_cstr(fp, ted->cwd, sizeof ted->cwd);
u16 active_node_idx = read_u16(fp);
u16 active_buffer_idx = read_u16(fp);
u16 nnodes = clamp_u16(read_u16(fp), 0, TED_MAX_NODES);
for (u16 i = 0; i < nnodes; ++i) {
session_read_node(ted, fp);
}
u16 nbuffers = clamp_u16(read_u16(fp), 0, TED_MAX_BUFFERS);
for (u16 i = 0; i < nbuffers; ++i) {
session_read_buffer(ted, fp);
}
if (active_node_idx == U16_MAX) {
ted->active_node = NULL;
} else {
active_node_idx = clamp_u16(active_node_idx, 0, TED_MAX_NODES);
if (ted->nodes_used[active_node_idx])
ted->active_node = &ted->nodes[active_node_idx];
}
if (active_buffer_idx == U16_MAX) {
ted->active_buffer = NULL;
} else {
active_buffer_idx = clamp_u16(active_buffer_idx, 0, TED_MAX_BUFFERS);
if (ted->buffers_used[active_buffer_idx])
ted->active_buffer = &ted->buffers[active_buffer_idx];
}
if (nbuffers && !ted->active_buffer) {
// set active buffer to something
for (u16 i = 0; i < TED_MAX_BUFFERS; ++i) {
if (ted->buffers_used[i]) {
ted_switch_to_buffer(ted, &ted->buffers[i]);
break;
}
}
}
}
static void session_write(Ted *ted) {
Settings const *settings = ted->settings;
if (!settings->restore_session)
return;
// first we write to a prefixed file so in case something goes wrong we still have the old session.
char filename1[TED_PATH_MAX], filename2[TED_PATH_MAX];
strbuf_printf(filename1, "%s/_" SESSION_FILENAME, ted->local_data_dir);
strbuf_printf(filename2, "%s/" SESSION_FILENAME, ted->local_data_dir);
FILE *fp = fopen(filename1, "wb");
if (fp) {
session_write_file(ted, fp);
bool success = !ferror(fp);
success &= fclose(fp) == 0;
if (success) {
remove(filename2);
rename(filename1, filename2); // overwrite old session
}
}
}
static void session_read(Ted *ted) {
Settings const *settings = ted->settings;
if (settings->restore_session) {
char filename[TED_PATH_MAX];
strbuf_printf(filename, "%s/" SESSION_FILENAME, ted->local_data_dir);
FILE *fp = fopen(filename, "rb");
if (fp) {
session_read_file(ted, fp);
fclose(fp);
}
}
}
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