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document.c
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document.c
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/* See LICENSE file for license and copyright information */
#define _BSD_SOURCE
#define _XOPEN_SOURCE 700
#include <sys/wait.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
#include <glib.h>
#include <glib/gi18n.h>
#ifdef WITH_MAGIC
#include <magic.h>
#endif
#include <unistd.h>
#include <girara/datastructures.h>
#include <girara/utils.h>
#include <girara/statusbar.h>
#include <girara/session.h>
#include <girara/settings.h>
#include "adjustment.h"
#include "document.h"
#include "utils.h"
#include "zathura.h"
#include "render.h"
#include "database.h"
#include "page.h"
#include "page-widget.h"
#include "plugin.h"
/** Read a most GT_MAX_READ bytes before falling back to file. */
static const size_t GT_MAX_READ = 1 << 16;
static const gchar* guess_type(const char* path);
/**
* Document
*/
struct zathura_document_s {
char* file_path; /**< File path of the document */
char* basename; /**< Basename of the document */
const char* password; /**< Password of the document */
unsigned int current_page_number; /**< Current page number */
unsigned int number_of_pages; /**< Number of pages */
double scale; /**< Scale value */
unsigned int rotate; /**< Rotation */
void* data; /**< Custom data */
zathura_adjust_mode_t adjust_mode; /**< Adjust mode (best-fit, width) */
int page_offset; /**< Page offset */
double cell_width; /**< width of a page cell in the document (not ransformed by scale and rotation) */
double cell_height; /**< height of a page cell in the document (not ransformed by scale and rotation) */
unsigned int view_width; /**< width of current viewport */
unsigned int view_height; /**< height of current viewport */
unsigned int pages_per_row; /**< number of pages in a row */
unsigned int first_page_column; /**< column of the first page */
unsigned int page_padding; /**< padding between pages */
double position_x; /**< X adjustment */
double position_y; /**< Y adjustment */
/**
* Document pages
*/
zathura_page_t** pages;
/**
* Used plugin
*/
zathura_plugin_t* plugin;
};
zathura_document_t*
zathura_document_open(zathura_plugin_manager_t* plugin_manager, const char*
path, const char* password, zathura_error_t* error)
{
if (path == NULL) {
return NULL;
}
if (g_file_test(path, G_FILE_TEST_EXISTS) == FALSE) {
girara_error("File '%s' does not exist", path);
return NULL;
}
const gchar* content_type = guess_type(path);
if (content_type == NULL) {
girara_error("Could not determine file type.");
return NULL;
}
/* determine real path */
long path_max;
#ifdef PATH_MAX
path_max = PATH_MAX;
#else
path_max = pathconf(path,_PC_PATH_MAX);
if (path_max <= 0)
path_max = 4096;
#endif
char* real_path = NULL;
zathura_document_t* document = NULL;
real_path = malloc(sizeof(char) * path_max);
if (real_path == NULL) {
g_free((void*)content_type);
return NULL;
}
if (realpath(path, real_path) == NULL) {
g_free((void*)content_type);
free(real_path);
return NULL;
}
zathura_plugin_t* plugin = zathura_plugin_manager_get_plugin(plugin_manager, content_type);
g_free((void*)content_type);
if (plugin == NULL) {
girara_error("unknown file type\n");
*error = ZATHURA_ERROR_UNKNOWN;
goto error_free;
}
document = g_malloc0(sizeof(zathura_document_t));
document->file_path = real_path;
document->basename = g_path_get_basename(real_path);
document->password = password;
document->scale = 1.0;
document->plugin = plugin;
document->adjust_mode = ZATHURA_ADJUST_NONE;
document->cell_width = 0.0;
document->cell_height = 0.0;
document->view_height = 0;
document->view_width = 0;
document->position_x = 0.0;
document->position_y = 0.0;
/* open document */
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(plugin);
if (functions->document_open == NULL) {
girara_error("plugin has no open function\n");
goto error_free;
}
zathura_error_t int_error = functions->document_open(document);
if (int_error != ZATHURA_ERROR_OK) {
if (error != NULL) {
*error = int_error;
}
girara_error("could not open document\n");
goto error_free;
}
/* read all pages */
document->pages = calloc(document->number_of_pages, sizeof(zathura_page_t*));
if (document->pages == NULL) {
goto error_free;
}
for (unsigned int page_id = 0; page_id < document->number_of_pages; page_id++) {
zathura_page_t* page = zathura_page_new(document, page_id, NULL);
if (page == NULL) {
goto error_free;
}
document->pages[page_id] = page;
/* cell_width and cell_height is the maximum of all the pages width and height */
const double width = zathura_page_get_width(page);
if (document->cell_width < width)
document->cell_width = width;
const double height = zathura_page_get_height(page);
if (document->cell_height < height)
document->cell_height = height;
}
return document;
error_free:
free(real_path);
if (document != NULL && document->pages != NULL) {
for (unsigned int page_id = 0; page_id < document->number_of_pages; page_id++) {
zathura_page_free(document->pages[page_id]);
}
free(document->pages);
}
g_free(document);
return NULL;
}
zathura_error_t
zathura_document_free(zathura_document_t* document)
{
if (document == NULL || document->plugin == NULL) {
return ZATHURA_ERROR_INVALID_ARGUMENTS;
}
/* free pages */
for (unsigned int page_id = 0; page_id < document->number_of_pages; page_id++) {
zathura_page_free(document->pages[page_id]);
document->pages[page_id] = NULL;
}
free(document->pages);
/* free document */
zathura_error_t error = ZATHURA_ERROR_OK;
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(document->plugin);
if (functions->document_free == NULL) {
error = ZATHURA_ERROR_NOT_IMPLEMENTED;
} else {
error = functions->document_free(document, document->data);
}
if (document->file_path != NULL) {
free(document->file_path);
}
g_free(document->basename);
g_free(document);
return error;
}
const char*
zathura_document_get_path(zathura_document_t* document)
{
if (document == NULL) {
return NULL;
}
return document->file_path;
}
const char*
zathura_document_get_basename(zathura_document_t* document)
{
if (document == NULL) {
return NULL;
}
return document->basename;
}
const char*
zathura_document_get_password(zathura_document_t* document)
{
if (document == NULL) {
return NULL;
}
return document->password;
}
zathura_page_t*
zathura_document_get_page(zathura_document_t* document, unsigned int index)
{
if (document == NULL || document->pages == NULL || (document->number_of_pages <= index)) {
return NULL;
}
return document->pages[index];
}
void*
zathura_document_get_data(zathura_document_t* document)
{
if (document == NULL) {
return NULL;
}
return document->data;
}
void
zathura_document_set_data(zathura_document_t* document, void* data)
{
if (document == NULL) {
return;
}
document->data = data;
}
unsigned int
zathura_document_get_number_of_pages(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->number_of_pages;
}
void
zathura_document_set_number_of_pages(zathura_document_t* document, unsigned int number_of_pages)
{
if (document == NULL) {
return;
}
document->number_of_pages = number_of_pages;
}
unsigned int
zathura_document_get_current_page_number(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->current_page_number;
}
void
zathura_document_set_current_page_number(zathura_document_t* document, unsigned int
current_page)
{
if (document == NULL) {
return;
}
document->current_page_number = current_page;
}
double
zathura_document_get_position_x(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->position_x;
}
double
zathura_document_get_position_y(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->position_y;
}
void
zathura_document_set_position_x(zathura_document_t* document, double position_x)
{
if (document == NULL) {
return;
}
document->position_x = position_x;
}
void
zathura_document_set_position_y(zathura_document_t* document, double position_y)
{
if (document == NULL) {
return;
}
document->position_y = position_y;
}
double
zathura_document_get_scale(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->scale;
}
void
zathura_document_set_scale(zathura_document_t* document, double scale)
{
if (document == NULL) {
return;
}
document->scale = scale;
}
unsigned int
zathura_document_get_rotation(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->rotate;
}
void
zathura_document_set_rotation(zathura_document_t* document, unsigned int rotation)
{
if (document == NULL) {
return;
}
document->rotate = rotation % 360;
if (document->rotate > 0 && document->rotate <= 90) {
document->rotate = 90;
} else if (document->rotate > 0 && document->rotate <= 180) {
document->rotate = 180;
} else if (document->rotate > 0 && document->rotate <= 270) {
document->rotate = 270;
} else {
document->rotate = 0;
}
}
zathura_adjust_mode_t
zathura_document_get_adjust_mode(zathura_document_t* document)
{
if (document == NULL) {
return ZATHURA_ADJUST_NONE;
}
return document->adjust_mode;
}
void
zathura_document_set_adjust_mode(zathura_document_t* document, zathura_adjust_mode_t mode)
{
if (document == NULL) {
return;
}
document->adjust_mode = mode;
}
int
zathura_document_get_page_offset(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->page_offset;
}
void
zathura_document_set_page_offset(zathura_document_t* document, unsigned int page_offset)
{
if (document == NULL) {
return;
}
document->page_offset = page_offset;
}
void
zathura_document_set_viewport_width(zathura_document_t* document, unsigned int width)
{
if (document == NULL) {
return;
}
document->view_width = width;
}
void
zathura_document_set_viewport_height(zathura_document_t* document, unsigned int height)
{
if (document == NULL) {
return;
}
document->view_height = height;
}
void
zathura_document_get_viewport_size(zathura_document_t* document,
unsigned int *height, unsigned int* width)
{
g_return_if_fail(document != NULL && height != NULL && width != NULL);
*height = document->view_height;
*width = document->view_width;
}
void
zathura_document_get_cell_size(zathura_document_t* document,
unsigned int* height, unsigned int* width)
{
g_return_if_fail(document != NULL && height != NULL && width != NULL);
page_calc_height_width(document, document->cell_height, document->cell_width,
height, width, true);
}
void
zathura_document_get_document_size(zathura_document_t* document,
unsigned int* height, unsigned int* width)
{
g_return_if_fail(document != NULL && height != NULL && width != NULL);
const unsigned int npag = zathura_document_get_number_of_pages(document);
const unsigned int ncol = zathura_document_get_pages_per_row(document);
const unsigned int c0 = zathura_document_get_first_page_column(document);
const unsigned int nrow = (npag + c0 - 1 + ncol - 1) / ncol; /* number of rows */
const unsigned int pad = zathura_document_get_page_padding(document);
unsigned int cell_height = 0;
unsigned int cell_width = 0;
zathura_document_get_cell_size(document, &cell_height, &cell_width);
*width = ncol * cell_width + (ncol - 1) * pad;
*height = nrow * cell_height + (nrow - 1) * pad;
}
void
zathura_document_set_page_layout(zathura_document_t* document, unsigned int page_padding,
unsigned int pages_per_row, unsigned int first_page_column)
{
g_return_if_fail(document != NULL);
document->page_padding = page_padding;
document->pages_per_row = pages_per_row;
if (first_page_column < 1) {
first_page_column = 1;
} else if (first_page_column > pages_per_row) {
first_page_column = ((first_page_column - 1) % pages_per_row) + 1;
}
document->first_page_column = first_page_column;
}
unsigned int
zathura_document_get_page_padding(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->page_padding;
}
unsigned int
zathura_document_get_pages_per_row(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->pages_per_row;
}
unsigned int
zathura_document_get_first_page_column(zathura_document_t* document)
{
if (document == NULL) {
return 0;
}
return document->first_page_column;
}
zathura_error_t
zathura_document_save_as(zathura_document_t* document, const char* path)
{
if (document == NULL || document->plugin == NULL || path == NULL) {
return ZATHURA_ERROR_UNKNOWN;
}
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(document->plugin);
if (functions->document_save_as == NULL) {
return ZATHURA_ERROR_NOT_IMPLEMENTED;
}
return functions->document_save_as(document, document->data, path);
}
girara_tree_node_t*
zathura_document_index_generate(zathura_document_t* document, zathura_error_t* error)
{
if (document == NULL || document->plugin == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_INVALID_ARGUMENTS;
}
return NULL;
}
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(document->plugin);
if (functions->document_index_generate == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_NOT_IMPLEMENTED;
}
return NULL;
}
return functions->document_index_generate(document, document->data, error);
}
girara_list_t*
zathura_document_attachments_get(zathura_document_t* document, zathura_error_t* error)
{
if (document == NULL || document->plugin == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_INVALID_ARGUMENTS;
}
return NULL;
}
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(document->plugin);
if (functions->document_attachments_get == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_NOT_IMPLEMENTED;
}
return NULL;
}
return functions->document_attachments_get(document, document->data, error);
}
zathura_error_t
zathura_document_attachment_save(zathura_document_t* document, const char* attachment, const char* file)
{
if (document == NULL || document->plugin == NULL) {
return ZATHURA_ERROR_INVALID_ARGUMENTS;
}
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(document->plugin);
if (functions->document_attachment_save == NULL) {
return ZATHURA_ERROR_NOT_IMPLEMENTED;
}
return functions->document_attachment_save(document, document->data, attachment, file);
}
girara_list_t*
zathura_document_get_information(zathura_document_t* document, zathura_error_t* error)
{
if (document == NULL || document->plugin == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_INVALID_ARGUMENTS;
}
return NULL;
}
zathura_plugin_functions_t* functions = zathura_plugin_get_functions(document->plugin);
if (functions->document_get_information == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_NOT_IMPLEMENTED;
}
return NULL;
}
girara_list_t* result = functions->document_get_information(document, document->data, error);
if (result != NULL) {
girara_list_set_free_function(result, (girara_free_function_t) zathura_document_information_entry_free);
}
return result;
}
static const gchar*
guess_type(const char* path)
{
const gchar* content_type = NULL;
#ifdef WITH_MAGIC
const char* mime_type = NULL;
/* creat magic cookie */
const int flags =
MAGIC_MIME_TYPE |
MAGIC_SYMLINK |
MAGIC_NO_CHECK_APPTYPE |
MAGIC_NO_CHECK_CDF |
MAGIC_NO_CHECK_ELF |
MAGIC_NO_CHECK_ENCODING;
magic_t magic = magic_open(flags);
if (magic == NULL) {
girara_debug("failed creating the magic cookie");
goto cleanup;
}
/* ... and load mime database */
if (magic_load(magic, NULL) < 0) {
girara_debug("failed loading the magic database: %s", magic_error(magic));
goto cleanup;
}
/* get the mime type */
mime_type = magic_file(magic, path);
if (mime_type == NULL) {
girara_debug("failed guessing filetype: %s", magic_error(magic));
goto cleanup;
}
girara_debug("magic detected filetype: %s", mime_type);
content_type = g_strdup(mime_type);
cleanup:
if (magic != NULL) {
magic_close(magic);
}
if (content_type != NULL) {
return content_type;
}
/* else fallback to g_content_type_guess method */
#endif /*WITH_MAGIC*/
gboolean uncertain = FALSE;
content_type = g_content_type_guess(path, NULL, 0, &uncertain);
if (content_type == NULL) {
girara_debug("g_content_type failed\n");
} else {
if (uncertain == FALSE) {
girara_debug("g_content_type detected filetype: %s", content_type);
return content_type;
}
girara_debug("g_content_type is uncertain, guess: %s", content_type);
}
FILE* f = fopen(path, "rb");
if (f == NULL) {
return NULL;
}
const int fd = fileno(f);
guchar* content = NULL;
size_t length = 0u;
ssize_t bytes_read = -1;
while (uncertain == TRUE && length < GT_MAX_READ && bytes_read != 0) {
g_free((void*)content_type);
content_type = NULL;
content = g_realloc(content, length + BUFSIZ);
bytes_read = read(fd, content + length, BUFSIZ);
if (bytes_read == -1) {
break;
}
length += bytes_read;
content_type = g_content_type_guess(NULL, content, length, &uncertain);
girara_debug("new guess: %s uncertain: %d, read: %zu", content_type, uncertain, length);
}
fclose(f);
g_free(content);
if (uncertain == FALSE) {
return content_type;
}
g_free((void*)content_type);
content_type = NULL;
girara_debug("falling back to file");
GString* command = g_string_new("file -b --mime-type ");
char* tmp = g_shell_quote(path);
g_string_append(command, tmp);
g_free(tmp);
GError* error = NULL;
char* out = NULL;
int ret = 0;
g_spawn_command_line_sync(command->str, &out, NULL, &ret, &error);
g_string_free(command, TRUE);
if (error != NULL) {
girara_warning("failed to execute command: %s", error->message);
g_error_free(error);
g_free(out);
return NULL;
}
if (WEXITSTATUS(ret) != 0) {
girara_warning("file failed with error code: %d", WEXITSTATUS(ret));
g_free(out);
return NULL;
}
g_strdelimit(out, "\n\r", '\0');
return out;
}
zathura_plugin_t*
zathura_document_get_plugin(zathura_document_t* document)
{
if (document == NULL) {
return NULL;
}
return document->plugin;
}