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030a8c65c1
The plan is to put in adjustment.c every piece of code that has to do with document positioning, either computing it from data on the document side, or talking to GTK. We want to have at our disposal functions to compute sizes and positions without having to ask for it to a GTK widget. The new functions are: - move page_calc_height_width to adjustment.c - add page_calc_position that rotates a position relative to a page according to the rotation settings. - add position_to_page_number that computes the number of a page sitting at a given position (given in document-relative coordinates) - add page_number_to_position that computes the position (in document relative coordinates) that will be placed at the center of the viewport. - add page_is_visible that checks whether the given page intersects the viewport.
139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/* See LICENSE file for license and copyright information */
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#ifndef UTILS_H
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#define UTILS_H
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#include <stdbool.h>
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#include <gtk/gtk.h>
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#include <girara/types.h>
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#include "document.h"
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#define LENGTH(x) (sizeof(x)/sizeof((x)[0]))
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typedef struct page_offset_s
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{
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int x;
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int y;
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} page_offset_t;
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/**
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* Returns the file extension of a path
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*
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* @param path Path to the file
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* @return The file extension or NULL
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*/
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const char* file_get_extension(const char* path);
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/**
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* This function checks if the file has a valid extension. A extension is
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* evaluated as valid if it matches a supported filetype.
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*
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* @param zathura Zathura object
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* @param path The path to the file
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* @return true if the extension is valid, otherwise false
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*/
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bool file_valid_extension(zathura_t* zathura, const char* path);
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/**
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* Executes a system command and saves its output into output
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*
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* @param argv The command
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* @param output Pointer where the output will be saved
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* @return true if no error occured, otherwise false
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*/
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bool execute_command(char* const argv[], char** output);
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/**
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* Generates the document index based upon the list retreived from the document
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* object.
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*
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* @param model The tree model
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* @param parent The tree iterator parent
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* @param tree The Tree iterator
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*/
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void document_index_build(GtkTreeModel* model, GtkTreeIter* parent, girara_tree_node_t* tree);
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/**
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* Calculates the offset of the page to the top of the viewing area as
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* well as to the left side of it. The result has to be freed.
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*
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* @param zathura Zathura session
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* @param page The Page
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* @param offset Applied offset
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* @return The calculated offset or NULL if an error occured
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*/
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void page_calculate_offset(zathura_t* zathura, zathura_page_t* page, page_offset_t* offset);
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/**
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* Rotate a rectangle by 0, 90, 180 or 270 degree
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*
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* @param rectangle the rectangle to rotate
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* @param degree rotation degree
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* @param height the height of the enclosing rectangle
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* @param width the width of the enclosing rectangle
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* @return the rotated rectangle
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*/
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zathura_rectangle_t rotate_rectangle(zathura_rectangle_t rectangle, unsigned int degree, double height, double width);
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/**
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* Calculates the new coordinates based on the rotation and scale level of the
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* document for the given rectangle
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*
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* @param page Page where the rectangle should be
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* @param rectangle The rectangle
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* @return New rectangle
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*/
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zathura_rectangle_t recalc_rectangle(zathura_page_t* page, zathura_rectangle_t rectangle);
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/**
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* Returns the page widget of the page
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*
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* @param zathura The zathura instance
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* @param page The page object
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* @return The page widget of the page
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* @return NULL if an error occured
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*/
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GtkWidget* zathura_page_get_widget(zathura_t* zathura, zathura_page_t* page);
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/**
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* Set if the search results should be drawn or not
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*
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* @param zathura Zathura instance
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* @param value true if they should be drawn, otherwise false
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*/
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void document_draw_search_results(zathura_t* zathura, bool value);
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/**
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* Create zathura version string
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*
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* @param zathura The zathura instance
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* @param markup Enable markup
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* @return Version string
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*/
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char* zathura_get_version_string(zathura_t* zathura, bool markup);
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/**
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* Replaces all occurences of \ref old in \ref string with \ref new and returns
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* a new allocated string
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*
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* @param string The original string
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* @param old String to replace
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* @param new Replacement string
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*
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* @return new allocated string
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*/
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char* replace_substring(const char* string, const char* old, const char* new);
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/**
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* Get a pointer to the GdkAtom of the current clipboard.
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*
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* @param zathura The zathura instance
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*
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* @return A pointer to a GdkAtom object correspoinding to the current
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* clipboard, or NULL.
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*/
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GdkAtom* get_selection(zathura_t* zathura);
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#endif // UTILS_H
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