zathura/zathura.h
Benoît Knecht c9eef95492 Use signals to readjust_view_after_zooming()
Instead of guesstimating the values of the scrollbars adjustments after
a change in zoom level, connect callbacks to the "changed" GtkAdjustment
event (which is emitted when the bounds or page_size of the adjustment
change, e.g. when the zoom level changes), and compute the new values
from there.

The previous adjustment values are tracked in zathura->ui.hadjustment
and zathura->ui.vadjustment (and updated by signal handlers as well), so
that the view's position can be maintained while zooming.

cb_view_hadjustment_changed() centers the page horizontally if a
"best-fit" or "width" zoom is being performed, or if "zoom-center" is
true; otherwise, it keeps the view horizontally centered around the same
area of the page.

cb_view_vadjustment_changed() always keeps the view vertically centered
around the same area of the page.

Many thanks to Marwan Tanager for thoroughly reviewing the various
stages of this patch, and actually coming up with a working solution.

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
2013-03-23 16:02:56 +01:00

370 lines
9.3 KiB
C

/* See LICENSE file for license and copyright information */
#ifndef ZATHURA_H
#define ZATHURA_H
#include <stdbool.h>
#include <girara/types.h>
#include <gtk/gtk.h>
#include "macros.h"
#include "types.h"
#if (GTK_MAJOR_VERSION == 3)
#include <gtk/gtkx.h>
#endif
enum { NEXT, PREVIOUS, LEFT, RIGHT, UP, DOWN, BOTTOM, TOP, HIDE, HIGHLIGHT,
DELETE_LAST_WORD, DELETE_LAST_CHAR, DEFAULT, ERROR, WARNING, NEXT_GROUP,
PREVIOUS_GROUP, ZOOM_IN, ZOOM_OUT, ZOOM_ORIGINAL, ZOOM_SPECIFIC, FORWARD,
BACKWARD, CONTINUOUS, DELETE_LAST, EXPAND, EXPAND_ALL, COLLAPSE_ALL, COLLAPSE,
SELECT, GOTO_DEFAULT, GOTO_LABELS, GOTO_OFFSET, HALF_UP, HALF_DOWN, FULL_UP,
FULL_DOWN, HALF_LEFT, HALF_RIGHT, FULL_LEFT, FULL_RIGHT, NEXT_CHAR,
PREVIOUS_CHAR, DELETE_TO_LINE_START, APPEND_FILEPATH, ROTATE_CW, ROTATE_CCW };
/* unspecified page number */
enum {
ZATHURA_PAGE_NUMBER_UNSPECIFIED = INT_MIN
};
/* forward declaration for types form database.h */
typedef struct _ZathuraDatabase zathura_database_t;
/* forward declaration for types from render.h */
struct render_thread_s;
typedef struct render_thread_s render_thread_t;
/**
* Jump
*/
typedef struct zathura_jump_s
{
unsigned int page;
double x;
double y;
} zathura_jump_t;
struct zathura_s
{
struct
{
girara_session_t* session; /**< girara interface session */
struct
{
girara_statusbar_item_t* buffer; /**< buffer statusbar entry */
girara_statusbar_item_t* file; /**< file statusbar entry */
girara_statusbar_item_t* page_number; /**< page number statusbar entry */
} statusbar;
struct
{
GdkColor recolor_dark_color; /**< Dark color for recoloring */
GdkColor recolor_light_color; /**< Light color for recoloring */
GdkColor highlight_color; /**< Color for highlighting */
GdkColor highlight_color_active; /** Color for highlighting */
GdkColor render_loading_bg; /**< Background color for render "Loading..." */
GdkColor render_loading_fg; /**< Foreground color for render "Loading..." */
} colors;
GtkWidget *page_widget_alignment;
GtkWidget *page_widget; /**< Widget that contains all rendered pages */
GtkWidget *index; /**< Widget to show the index of the document */
GtkAdjustment *hadjustment; /**< Tracking hadjustment */
GtkAdjustment *vadjustment; /**< Tracking vadjustment */
} ui;
struct
{
render_thread_t* render_thread; /**< The thread responsible for rendering the pages */
} sync;
struct
{
void* manager; /**< Plugin manager */
} plugins;
struct
{
gchar* config_dir; /**< Path to the configuration directory */
gchar* data_dir; /**< Path to the data directory */
} config;
struct
{
bool enabled;
gchar* editor;
} synctex;
struct
{
GtkPrintSettings* settings; /**< Print settings */
GtkPageSetup* page_setup; /**< Saved page setup */
} print;
struct
{
bool recolor_keep_hue; /**< Keep hue when recoloring */
bool recolor; /**< Recoloring mode switch */
bool update_page_number; /**< Update current page number */
int search_direction; /**< Current search direction (FORWARD or BACKWARD) */
girara_list_t* marks; /**< Marker */
char** arguments; /**> Arguments that were passed at startup */
} global;
struct
{
girara_mode_t normal; /**< Normal mode */
girara_mode_t fullscreen; /**< Fullscreen mode */
girara_mode_t index; /**< Index mode */
girara_mode_t insert; /**< Insert mode */
} modes;
struct
{
gchar* file; /**< bookmarks file */
girara_list_t* bookmarks; /**< bookmarks */
} bookmarks;
struct
{
girara_list_t* list;
girara_list_iterator_t *cur;
unsigned int size;
unsigned int max_size;
} jumplist;
struct
{
gchar* file;
} stdin_support;
zathura_document_t* document; /**< The current document */
GtkWidget** pages; /**< The page widgets */
zathura_database_t* database; /**< The database */
/**
* File monitor
*/
struct {
GFileMonitor* monitor; /**< File monitor */
GFile* file; /**< File for file monitor */
gchar* file_path; /**< Save file path */
gchar* password; /**< Save password */
} file_monitor;
};
/**
* Creates a zathura session
*
* @return zathura session object or NULL if zathura could not be creeated
*/
zathura_t* zathura_create(void);
/**
* Initializes zathura
*
* @param zathura The zathura session
* @return true if initialization has been successful
*/
bool zathura_init(zathura_t* zathura);
/**
* Free zathura session
*
* @param zathura The zathura session
*/
void zathura_free(zathura_t* zathura);
/**
* Set parent window id
*
* @param zathura The zathura session
* @param xid The window id
*/
#if (GTK_MAJOR_VERSION == 2)
void zathura_set_xid(zathura_t* zathura, GdkNativeWindow xid);
#else
void zathura_set_xid(zathura_t* zathura, Window xid);
#endif
/**
* Set the path to the configuration directory
*
* @param zathura The zathura session
* @param dir Directory path
*/
void zathura_set_config_dir(zathura_t* zathura, const char* dir);
/**
* Set the path to the data directory
*
* @param zathura The zathura session
* @param dir Directory path
*/
void zathura_set_data_dir(zathura_t* zathura, const char* dir);
/**
* Set the path to the plugin directory
*
* @param zathura The zathura session
* @param dir Directory path
*/
void zathura_set_plugin_dir(zathura_t* zathura, const char* dir);
/**
* Enables synctex support and sets the synctex editor command
*
* @param zathura The zathura session
* @param command Synctex editor command
*/
void zathura_set_synctex_editor_command(zathura_t* zathura, const char* command);
/**
* En/Disable zathuras synctex support
*
* @param zathura The zathura session
* @param value The value
*/
void zathura_set_synctex(zathura_t* zathura, bool value);
/**
* Sets the program parameters
*
* @param zathura The zathura session
* @param argv List of arguments
*/
void zathura_set_argv(zathura_t* zathura, char** argv);
/**
* Opens a file
*
* @param zathura The zathura session
* @param path The path to the file
* @param password The password of the file
*
* @return If no error occured true, otherwise false, is returned.
*/
bool document_open(zathura_t* zathura, const char* path, const char* password,
int page_number);
/**
* Opens a file (idle)
*
* @param zathura The zathura session
* @param path The path to the file
* @param password The password of the file
*/
void document_open_idle(zathura_t* zathura, const char* path,
const char* password, int page_number);
/**
* Save a open file
*
* @param zathura The zathura session
* @param path The path
* @param overwrite Overwrite existing file
*
* @return If no error occured true, otherwise false, is returned.
*/
bool document_save(zathura_t* zathura, const char* path, bool overwrite);
/**
* Closes the current opened document
*
* @param zathura The zathura session
* @param keep_monitor Set to true if monitor should be kept (sc_reload)
* @return If no error occured true, otherwise false, is returned.
*/
bool document_close(zathura_t* zathura, bool keep_monitor);
/**
* Opens the page with the given number
*
* @param zathura The zathura session
* @param page_id The id of the page that should be set
* @return If no error occured true, otherwise false, is returned.
*/
bool page_set(zathura_t* zathura, unsigned int page_id);
/**
* Opens the page with the given number (delayed)
*
* @param zathura The zathura session
* @param page_id The id of the page that should be set
* @return If no error occured true, otherwise false, is returned.
*/
bool page_set_delayed(zathura_t* zathura, unsigned int page_id);
/**
* Moves to the given position
*
* @param zathura Zathura session
* @param position_x X coordinate
* @param position_y Y coordinate
* @return If no error occured true, otherwise false, is returned.
*/
bool position_set_delayed(zathura_t* zathura, double position_x, double position_y);
/**
* Builds the box structure to show the rendered pages
*
* @param zathura The zathura session
* @param pages_per_row Number of shown pages per row
* @param first_page_column Column on which first page start
*/
void page_widget_set_mode(zathura_t* zathura, unsigned int pages_per_row, unsigned int first_page_column);
/**
* Updates the page number in the statusbar. Note that 1 will be added to the
* displayed number
*
* @param zathura The zathura session
*/
void statusbar_page_number_update(zathura_t* zathura);
/**
* Return current jump in the jumplist
*
* @param zathura The zathura session
* @return current jump
*/
zathura_jump_t* zathura_jumplist_current(zathura_t* zathura);
/**
* Move forward in the jumplist
*
* @param zathura The zathura session
*/
void zathura_jumplist_forward(zathura_t* zathura);
/**
* Move backward in the jumplist
*
* @param zathura The zathura session
*/
void zathura_jumplist_backward(zathura_t* zathura);
/**
* Save current page to the jumplist at current position
*
* @param zathura The zathura session
*/
void zathura_jumplist_save(zathura_t* zathura);
/**
* Add current page as a new item to the jumplist after current position
*
* @param zathura The zathura session
*/
void zathura_jumplist_add(zathura_t* zathura);
/**
* Add a page to the jumplist after current position
*
* @param zathura The zathura session
*/
void zathura_jumplist_append_jump(zathura_t* zathura);
#endif // ZATHURA_H