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/* -*- c-basic-offset:2; tab-width:2; indent-tabs-mode:nil -*- */
#include "vt_model.h"
#include <pobl/bl_mem.h> /* malloc/free */
#include <pobl/bl_debug.h>
#include <pobl/bl_util.h>
/* --- global functions --- */
int vt_model_init(vt_model_t *model, u_int num_cols, u_int num_rows) {
u_int count;
if (num_rows == 0 || num_cols == 0) {
return 0;
}
model->num_rows = num_rows;
model->num_cols = num_cols;
if ((model->lines = calloc(sizeof(vt_line_t), model->num_rows)) == NULL) {
#ifdef DEBUG
bl_warn_printf(BL_DEBUG_TAG "calloc() failed.\n");
#endif
return 0;
}
for (count = 0; count < model->num_rows; count++) {
if (!vt_line_init(&model->lines[count], model->num_cols)) {
return 0;
}
}
model->beg_row = 0;
return 1;
}
void vt_model_final(vt_model_t *model) {
u_int count;
for (count = 0; count < model->num_rows; count++) {
vt_line_final(&model->lines[count]);
}
free(model->lines);
}
void vt_model_reset(vt_model_t *model) {
u_int count;
for (count = 0; count < model->num_rows; count++) {
vt_line_reset(&model->lines[count]);
vt_line_set_updated(&model->lines[count]);
}
}
int vt_model_resize(vt_model_t *model, u_int num_cols, u_int num_rows, u_int slide) {
int new_row;
u_int count;
u_int copy_rows;
vt_line_t *lines_p;
if (num_cols == 0 || num_rows == 0) {
return 0;
}
if (num_cols == model->num_cols && num_rows == model->num_rows) {
/* not resized */
return 0;
}
if ((lines_p = calloc(sizeof(vt_line_t), num_rows)) == NULL) {
return 0;
}
if (model->num_rows - slide > num_rows) {
copy_rows = num_rows;
} else {
copy_rows = model->num_rows - slide;
}
/* updating existing lines. */
for (new_row = 0; new_row < copy_rows; new_row++) {
vt_line_init(&lines_p[new_row], num_cols);
vt_line_copy(&lines_p[new_row], vt_model_get_line(model, slide));
slide++;
vt_line_set_modified_all(&lines_p[new_row]);
lines_p[new_row].is_modified = 2; /* XXX See set_real_modified() in vt_line.c */
}
/* freeing old data. */
for (count = 0; count < model->num_rows; count++) {
vt_line_final(&model->lines[count]);
}
free(model->lines);
model->lines = lines_p;
/* update empty lines. */
for (; new_row < num_rows; new_row++) {
vt_line_init(&lines_p[new_row], num_cols);
vt_line_set_modified_all(&lines_p[new_row]);
}
model->num_rows = num_rows;
model->num_cols = num_cols;
model->beg_row = 0;
return 1;
}
u_int vt_model_get_num_filled_rows(vt_model_t *model) {
u_int filled_rows;
for (filled_rows = model->num_rows; filled_rows > 0; filled_rows--) {
#if 1
/*
* XXX
* This is problematic, since the value of 'slide' can be incorrect when
* cursor is located at the line which contains white spaces alone.
*/
if (vt_line_get_num_filled_chars_except_sp(vt_model_get_line(model, filled_rows - 1)) > 0)
#else
if (!vt_line_is_empty(vt_model_get_line(model, filled_rows - 1)))
#endif
{
break;
}
}
return filled_rows;
}
int vt_model_end_row(vt_model_t *model) { return model->num_rows - 1; }
vt_line_t *vt_model_get_line(vt_model_t *model, int row) {
if (row < 0 || model->num_rows <= row) {
#ifdef __DEBUG
bl_debug_printf(BL_DEBUG_TAG " row %d is out of range.\n", row);
#endif
return NULL;
}
if (model->beg_row + row < model->num_rows) {
return &model->lines[model->beg_row + row];
} else {
return &model->lines[model->beg_row + row - model->num_rows];
}
}
void vt_model_scroll_upward(vt_model_t *model, u_int size) {
if (size > model->num_rows) {
size = model->num_rows;
}
if (model->beg_row + size >= model->num_rows) {
model->beg_row = model->beg_row + size - model->num_rows;
} else {
model->beg_row += size;
}
}
void vt_model_scroll_downward(vt_model_t *model, u_int size) {
if (size > model->num_rows) {
size = model->num_rows;
}
if (model->beg_row < size) {
model->beg_row = model->num_rows - (size - model->beg_row);
} else {
model->beg_row -= size;
}
}
#ifdef DEBUG
void vt_model_dump(vt_model_t *model) {
int row;
vt_line_t *line;
for (row = 0; row < model->num_rows; row++) {
line = vt_model_get_line(model, row);
if (vt_line_is_modified(line)) {
bl_msg_printf("!%.2d-%.2d", vt_line_get_beg_of_modified(line),
vt_line_get_end_of_modified(line));
} else {
bl_msg_printf(" ");
}
bl_msg_printf("[%.2d %.2d]", line->num_filled_chars, vt_line_get_num_filled_cols(line));
vt_str_dump(line->chars, line->num_filled_chars);
}
}
#endif
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