zathura/page-widget.c
Sebastian Ramacher 2d785cc20d Check indices before accessing the list
Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
2014-04-07 16:00:19 +02:00

932 lines
32 KiB
C

/* See LICENSE file for license and copyright information */
#include <girara/utils.h>
#include <girara/settings.h>
#include <girara/datastructures.h>
#include <girara/session.h>
#include <string.h>
#include <glib/gi18n.h>
#include "links.h"
#include "page-widget.h"
#include "page.h"
#include "render.h"
#include "utils.h"
#include "shortcuts.h"
#include "synctex.h"
#include "zathura.h"
G_DEFINE_TYPE(ZathuraPage, zathura_page_widget, GTK_TYPE_DRAWING_AREA)
typedef struct zathura_page_widget_private_s {
zathura_page_t* page; /**< Page object */
zathura_t* zathura; /**< Zathura object */
cairo_surface_t* surface; /**< Cairo surface */
ZathuraRenderRequest* render_request; /* Request object */
bool cached; /**< Cached state */
struct {
girara_list_t* list; /**< List of links on the page */
bool retrieved; /**< True if we already tried to retrieve the list of links */
bool draw; /**< True if links should be drawn */
unsigned int offset; /**< Offset to the links */
unsigned int n; /**< Number */
} links;
struct {
girara_list_t* list; /**< A list if there are search results that should be drawn */
int current; /**< The index of the current search result */
bool draw; /**< Draw search results */
} search;
struct {
girara_list_t* list; /**< List of images on the page */
bool retrieved; /**< True if we already tried to retrieve the list of images */
zathura_image_t* current; /**< Image data of selected image */
} images;
struct {
zathura_rectangle_t selection; /**< Region selected with the mouse */
struct {
int x; /**< X coordinate */
int y; /**< Y coordinate */
} selection_basepoint;
} mouse;
} zathura_page_widget_private_t;
#define ZATHURA_PAGE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE((obj), ZATHURA_TYPE_PAGE, \
zathura_page_widget_private_t))
static gboolean zathura_page_widget_draw(GtkWidget* widget, cairo_t* cairo);
static void zathura_page_widget_finalize(GObject* object);
static void zathura_page_widget_dispose(GObject* object);
static void zathura_page_widget_set_property(GObject* object, guint prop_id, const GValue* value, GParamSpec* pspec);
static void zathura_page_widget_get_property(GObject* object, guint prop_id, GValue* value, GParamSpec* pspec);
static void zathura_page_widget_size_allocate(GtkWidget* widget, GdkRectangle* allocation);
static void redraw_rect(ZathuraPage* widget, zathura_rectangle_t* rectangle);
static void redraw_all_rects(ZathuraPage* widget, girara_list_t* rectangles);
static void zathura_page_widget_popup_menu(GtkWidget* widget, GdkEventButton* event);
static gboolean cb_zathura_page_widget_button_press_event(GtkWidget* widget, GdkEventButton* button);
static gboolean cb_zathura_page_widget_button_release_event(GtkWidget* widget, GdkEventButton* button);
static gboolean cb_zathura_page_widget_motion_notify(GtkWidget* widget, GdkEventMotion* event);
static gboolean cb_zathura_page_widget_popup_menu(GtkWidget* widget);
static void cb_menu_image_copy(GtkMenuItem* item, ZathuraPage* page);
static void cb_menu_image_save(GtkMenuItem* item, ZathuraPage* page);
static void cb_update_surface(ZathuraRenderRequest* request, cairo_surface_t* surface, void* data);
static void cb_cache_added(ZathuraRenderRequest* request, void* data);
static void cb_cache_invalidated(ZathuraRenderRequest* request, void* data);
enum properties_e {
PROP_0,
PROP_PAGE,
PROP_ZATHURA,
PROP_DRAW_LINKS,
PROP_LINKS_OFFSET,
PROP_LINKS_NUMBER,
PROP_SEARCH_RESULTS,
PROP_SEARCH_RESULTS_LENGTH,
PROP_SEARCH_RESULTS_CURRENT,
PROP_DRAW_SEARCH_RESULTS,
PROP_LAST_VIEW,
};
enum {
TEXT_SELECTED,
IMAGE_SELECTED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static void
zathura_page_widget_class_init(ZathuraPageClass* class)
{
/* add private members */
g_type_class_add_private(class, sizeof(zathura_page_widget_private_t));
/* overwrite methods */
GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(class);
widget_class->draw = zathura_page_widget_draw;
widget_class->size_allocate = zathura_page_widget_size_allocate;
widget_class->button_press_event = cb_zathura_page_widget_button_press_event;
widget_class->button_release_event = cb_zathura_page_widget_button_release_event;
widget_class->motion_notify_event = cb_zathura_page_widget_motion_notify;
widget_class->popup_menu = cb_zathura_page_widget_popup_menu;
GObjectClass* object_class = G_OBJECT_CLASS(class);
object_class->dispose = zathura_page_widget_dispose;
object_class->finalize = zathura_page_widget_finalize;
object_class->set_property = zathura_page_widget_set_property;
object_class->get_property = zathura_page_widget_get_property;
/* add properties */
g_object_class_install_property(object_class, PROP_PAGE,
g_param_spec_pointer("page", "page", "the page to draw", G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_ZATHURA,
g_param_spec_pointer("zathura", "zathura", "the zathura instance", G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_DRAW_LINKS,
g_param_spec_boolean("draw-links", "draw-links", "Set to true if links should be drawn", FALSE, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_LINKS_OFFSET,
g_param_spec_int("offset-links", "offset-links", "Offset for the link numbers", 0, INT_MAX, 0, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_LINKS_NUMBER,
g_param_spec_int("number-of-links", "number-of-links", "Number of links", 0, INT_MAX, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_SEARCH_RESULTS,
g_param_spec_pointer("search-results", "search-results", "Set to the list of search results", G_PARAM_WRITABLE | G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_SEARCH_RESULTS_CURRENT,
g_param_spec_int("search-current", "search-current", "The current search result", -1, INT_MAX, 0, G_PARAM_WRITABLE | G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_SEARCH_RESULTS_LENGTH,
g_param_spec_int("search-length", "search-length", "The number of search results", -1, INT_MAX, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property(object_class, PROP_DRAW_SEARCH_RESULTS,
g_param_spec_boolean("draw-search-results", "draw-search-results", "Set to true if search results should be drawn", FALSE, G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
/* add signals */
signals[TEXT_SELECTED] = g_signal_new("text-selected",
ZATHURA_TYPE_PAGE,
G_SIGNAL_RUN_LAST,
0,
NULL,
NULL,
g_cclosure_marshal_generic,
G_TYPE_NONE,
1,
G_TYPE_STRING);
signals[IMAGE_SELECTED] = g_signal_new("image-selected",
ZATHURA_TYPE_PAGE,
G_SIGNAL_RUN_LAST,
0,
NULL,
NULL,
g_cclosure_marshal_generic,
G_TYPE_NONE,
1,
G_TYPE_OBJECT);
}
static void
zathura_page_widget_init(ZathuraPage* widget)
{
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
priv->page = NULL;
priv->surface = NULL;
priv->render_request = NULL;
priv->cached = false;
priv->links.list = NULL;
priv->links.retrieved = false;
priv->links.draw = false;
priv->links.offset = 0;
priv->links.n = 0;
priv->search.list = NULL;
priv->search.current = INT_MAX;
priv->search.draw = false;
priv->images.list = NULL;
priv->images.retrieved = false;
priv->images.current = NULL;
priv->mouse.selection.x1 = -1;
priv->mouse.selection.y1 = -1;
priv->mouse.selection_basepoint.x = -1;
priv->mouse.selection_basepoint.y = -1;
/* we want mouse events */
gtk_widget_add_events(GTK_WIDGET(widget),
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK);
}
GtkWidget*
zathura_page_widget_new(zathura_t* zathura, zathura_page_t* page)
{
g_return_val_if_fail(page != NULL, NULL);
GObject* ret = g_object_new(ZATHURA_TYPE_PAGE, "page", page, "zathura", zathura, NULL);
if (ret == NULL) {
return NULL;
}
ZathuraPage* widget = ZATHURA_PAGE(ret);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
priv->render_request = zathura_render_request_new(zathura->sync.render_thread, page);
g_signal_connect_object(priv->render_request, "completed",
G_CALLBACK(cb_update_surface), widget, 0);
g_signal_connect_object(priv->render_request, "cache-added",
G_CALLBACK(cb_cache_added), widget, 0);
g_signal_connect_object(priv->render_request, "cache-invalidated",
G_CALLBACK(cb_cache_invalidated), widget, 0);
return GTK_WIDGET(ret);
}
static void
zathura_page_widget_dispose(GObject* object)
{
ZathuraPage* widget = ZATHURA_PAGE(object);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
g_clear_object(&priv->render_request);
G_OBJECT_CLASS(zathura_page_widget_parent_class)->dispose(object);
}
static void
zathura_page_widget_finalize(GObject* object)
{
ZathuraPage* widget = ZATHURA_PAGE(object);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
if (priv->surface != NULL) {
cairo_surface_destroy(priv->surface);
}
if (priv->search.list != NULL) {
girara_list_free(priv->search.list);
}
if (priv->links.list != NULL) {
girara_list_free(priv->links.list);
}
G_OBJECT_CLASS(zathura_page_widget_parent_class)->finalize(object);
}
static void
zathura_page_widget_set_property(GObject* object, guint prop_id, const GValue* value, GParamSpec* pspec)
{
ZathuraPage* pageview = ZATHURA_PAGE(object);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(pageview);
switch (prop_id) {
case PROP_PAGE:
priv->page = g_value_get_pointer(value);
break;
case PROP_ZATHURA:
priv->zathura = g_value_get_pointer(value);
break;
case PROP_DRAW_LINKS:
priv->links.draw = g_value_get_boolean(value);
/* get links */
if (priv->links.draw == true && priv->links.retrieved == false) {
priv->links.list = zathura_page_links_get(priv->page, NULL);
priv->links.retrieved = true;
priv->links.n = (priv->links.list == NULL) ? 0 : girara_list_size(priv->links.list);
}
if (priv->links.retrieved == true && priv->links.list != NULL) {
GIRARA_LIST_FOREACH(priv->links.list, zathura_link_t*, iter, link)
if (link != NULL) {
zathura_rectangle_t rectangle = recalc_rectangle(priv->page, zathura_link_get_position(link));
redraw_rect(pageview, &rectangle);
}
GIRARA_LIST_FOREACH_END(priv->links.list, zathura_link_t*, iter, link);
}
break;
case PROP_LINKS_OFFSET:
priv->links.offset = g_value_get_int(value);
break;
case PROP_SEARCH_RESULTS:
if (priv->search.list != NULL && priv->search.draw) {
redraw_all_rects(pageview, priv->search.list);
girara_list_free(priv->search.list);
}
priv->search.list = g_value_get_pointer(value);
if (priv->search.list != NULL && priv->search.draw) {
priv->links.draw = false;
redraw_all_rects(pageview, priv->search.list);
}
priv->search.current = -1;
break;
case PROP_SEARCH_RESULTS_CURRENT: {
g_return_if_fail(priv->search.list != NULL);
if (priv->search.current >= 0 && priv->search.current < (signed) girara_list_size(priv->search.list)) {
zathura_rectangle_t* rect = girara_list_nth(priv->search.list, priv->search.current);
zathura_rectangle_t rectangle = recalc_rectangle(priv->page, *rect);
redraw_rect(pageview, &rectangle);
}
int val = g_value_get_int(value);
if (val < 0) {
priv->search.current = girara_list_size(priv->search.list);
} else {
priv->search.current = val;
if (priv->search.draw == true && val >= 0 && val < (signed) girara_list_size(priv->search.list)) {
zathura_rectangle_t* rect = girara_list_nth(priv->search.list, priv->search.current);
zathura_rectangle_t rectangle = recalc_rectangle(priv->page, *rect);
redraw_rect(pageview, &rectangle);
}
}
break;
}
case PROP_DRAW_SEARCH_RESULTS:
priv->search.draw = g_value_get_boolean(value);
/*
* we do the following instead of only redrawing the rectangles of the
* search results in order to avoid the rectangular margins that appear
* around the search terms after their highlighted rectangular areas are
* redrawn without highlighting.
*/
if (priv->search.list != NULL && zathura_page_get_visibility(priv->page)) {
gtk_widget_queue_draw(GTK_WIDGET(object));
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
}
}
static void
zathura_page_widget_get_property(GObject* object, guint prop_id, GValue* value, GParamSpec* pspec)
{
ZathuraPage* pageview = ZATHURA_PAGE(object);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(pageview);
switch (prop_id) {
case PROP_LINKS_NUMBER:
g_value_set_int(value, priv->links.n);
break;
case PROP_SEARCH_RESULTS_LENGTH:
g_value_set_int(value, priv->search.list == NULL ? 0 : girara_list_size(priv->search.list));
break;
case PROP_SEARCH_RESULTS_CURRENT:
g_value_set_int(value, priv->search.list == NULL ? -1 : priv->search.current);
break;
case PROP_SEARCH_RESULTS:
g_value_set_pointer(value, priv->search.list);
break;
case PROP_DRAW_SEARCH_RESULTS:
g_value_set_boolean(value, priv->search.draw);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
}
}
static gboolean
zathura_page_widget_draw(GtkWidget* widget, cairo_t* cairo)
{
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
zathura_document_t* document = zathura_page_get_document(priv->page);
const unsigned int page_height = gtk_widget_get_allocated_height(widget);
const unsigned int page_width = gtk_widget_get_allocated_width(widget);
if (priv->surface != NULL) {
cairo_save(cairo);
unsigned int rotation = zathura_document_get_rotation(document);
switch (rotation) {
case 90:
cairo_translate(cairo, page_width, 0);
break;
case 180:
cairo_translate(cairo, page_width, page_height);
break;
case 270:
cairo_translate(cairo, 0, page_height);
break;
}
if (rotation != 0) {
cairo_rotate(cairo, rotation * G_PI / 180.0);
}
cairo_set_source_surface(cairo, priv->surface, 0, 0);
cairo_paint(cairo);
cairo_restore(cairo);
/* draw rectangles */
char* font = NULL;
girara_setting_get(priv->zathura->ui.session, "font", &font);
float transparency = 0.5;
girara_setting_get(priv->zathura->ui.session, "highlight-transparency", &transparency);
if (font != NULL) {
cairo_select_font_face(cairo, font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
}
g_free(font);
/* draw links */
if (priv->links.draw == true && priv->links.n != 0) {
unsigned int link_counter = 0;
GIRARA_LIST_FOREACH(priv->links.list, zathura_link_t*, iter, link)
if (link != NULL) {
zathura_rectangle_t rectangle = recalc_rectangle(priv->page, zathura_link_get_position(link));
/* draw position */
const GdkRGBA color = priv->zathura->ui.colors.highlight_color;
cairo_set_source_rgba(cairo, color.red, color.green, color.blue, transparency);
cairo_rectangle(cairo, rectangle.x1, rectangle.y1,
(rectangle.x2 - rectangle.x1), (rectangle.y2 - rectangle.y1));
cairo_fill(cairo);
/* draw text */
cairo_set_source_rgba(cairo, 0, 0, 0, 1);
cairo_set_font_size(cairo, 10);
cairo_move_to(cairo, rectangle.x1 + 1, rectangle.y2 - 1);
char* link_number = g_strdup_printf("%i", priv->links.offset + ++link_counter);
cairo_show_text(cairo, link_number);
g_free(link_number);
}
GIRARA_LIST_FOREACH_END(priv->links.list, zathura_link_t*, iter, link);
}
/* draw search results */
if (priv->search.list != NULL && priv->search.draw == true) {
int idx = 0;
GIRARA_LIST_FOREACH(priv->search.list, zathura_rectangle_t*, iter, rect)
zathura_rectangle_t rectangle = recalc_rectangle(priv->page, *rect);
/* draw position */
if (idx == priv->search.current) {
const GdkRGBA color = priv->zathura->ui.colors.highlight_color_active;
cairo_set_source_rgba(cairo, color.red, color.green, color.blue, transparency);
} else {
const GdkRGBA color = priv->zathura->ui.colors.highlight_color;
cairo_set_source_rgba(cairo, color.red, color.green, color.blue, transparency);
}
cairo_rectangle(cairo, rectangle.x1, rectangle.y1,
(rectangle.x2 - rectangle.x1), (rectangle.y2 - rectangle.y1));
cairo_fill(cairo);
++idx;
GIRARA_LIST_FOREACH_END(priv->search.list, zathura_rectangle_t*, iter, rect);
}
/* draw selection */
if (priv->mouse.selection.y2 != -1 && priv->mouse.selection.x2 != -1) {
const GdkRGBA color = priv->zathura->ui.colors.highlight_color;
cairo_set_source_rgba(cairo, color.red, color.green, color.blue, transparency);
cairo_rectangle(cairo, priv->mouse.selection.x1, priv->mouse.selection.y1,
(priv->mouse.selection.x2 - priv->mouse.selection.x1), (priv->mouse.selection.y2 - priv->mouse.selection.y1));
cairo_fill(cairo);
}
} else {
/* set background color */
if (zathura_renderer_recolor_enabled(priv->zathura->sync.render_thread) == true) {
GdkRGBA color;
zathura_renderer_get_recolor_colors(priv->zathura->sync.render_thread, &color, NULL);
cairo_set_source_rgb(cairo, color.red, color.green, color.blue);
} else {
const GdkRGBA color = priv->zathura->ui.colors.render_loading_bg;
cairo_set_source_rgb(cairo, color.red, color.green, color.blue);
}
cairo_rectangle(cairo, 0, 0, page_width, page_height);
cairo_fill(cairo);
bool render_loading = true;
girara_setting_get(priv->zathura->ui.session, "render-loading", &render_loading);
/* write text */
if (render_loading == true) {
if (zathura_renderer_recolor_enabled(priv->zathura->sync.render_thread) == true) {
GdkRGBA color;
zathura_renderer_get_recolor_colors(priv->zathura->sync.render_thread, NULL, &color);
cairo_set_source_rgb(cairo, color.red, color.green, color.blue);
} else {
const GdkRGBA color = priv->zathura->ui.colors.render_loading_fg;
cairo_set_source_rgb(cairo, color.red/65535.0, color.green/65535.0, color.blue/65535.0);
}
const char* text = _("Loading...");
cairo_select_font_face(cairo, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cairo, 16.0);
cairo_text_extents_t extents;
cairo_text_extents(cairo, text, &extents);
double x = page_width * 0.5 - (extents.width * 0.5 + extents.x_bearing);
double y = page_height * 0.5 - (extents.height * 0.5 + extents.y_bearing);
cairo_move_to(cairo, x, y);
cairo_show_text(cairo, text);
}
/* render real page */
zathura_render_request(priv->render_request, g_get_real_time());
}
return FALSE;
}
static void
zathura_page_widget_redraw_canvas(ZathuraPage* pageview)
{
GtkWidget* widget = GTK_WIDGET(pageview);
gtk_widget_queue_draw(widget);
}
void
zathura_page_widget_update_surface(ZathuraPage* widget, cairo_surface_t* surface)
{
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
if (priv->surface != NULL) {
cairo_surface_destroy(priv->surface);
priv->surface = NULL;
}
if (surface != NULL) {
priv->surface = surface;
cairo_surface_reference(surface);
}
/* force a redraw here */
if (priv->surface != NULL) {
zathura_page_widget_redraw_canvas(widget);
}
}
static void
cb_update_surface(ZathuraRenderRequest* UNUSED(request),
cairo_surface_t* surface, void* data)
{
ZathuraPage* widget = data;
g_return_if_fail(ZATHURA_IS_PAGE(widget));
zathura_page_widget_update_surface(widget, surface);
}
static void
cb_cache_added(ZathuraRenderRequest* UNUSED(request), void* data)
{
ZathuraPage* widget = data;
g_return_if_fail(ZATHURA_IS_PAGE(widget));
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
priv->cached = true;
}
static void
cb_cache_invalidated(ZathuraRenderRequest* UNUSED(request), void* data)
{
ZathuraPage* widget = data;
g_return_if_fail(ZATHURA_IS_PAGE(widget));
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
if (zathura_page_widget_have_surface(widget) == true &&
priv->cached == true &&
zathura_page_get_visibility(priv->page) == false) {
/* The page was in the cache but got removed and is invisible, so get rid of
* the surface. */
zathura_page_widget_update_surface(widget, NULL);
}
priv->cached = false;
}
static void
zathura_page_widget_size_allocate(GtkWidget* widget, GdkRectangle* allocation)
{
GTK_WIDGET_CLASS(zathura_page_widget_parent_class)->size_allocate(widget, allocation);
ZathuraPage* page = ZATHURA_PAGE(widget);
zathura_page_widget_abort_render_request(page);
zathura_page_widget_update_surface(page, NULL);
}
static void
redraw_rect(ZathuraPage* widget, zathura_rectangle_t* rectangle)
{
/* cause the rect to be drawn */
GdkRectangle grect;
grect.x = rectangle->x1;
grect.y = rectangle->y1;
grect.width = (rectangle->x2 + 1) - rectangle->x1;
grect.height = (rectangle->y2 + 1) - rectangle->y1;
gtk_widget_queue_draw_area(GTK_WIDGET(widget), grect.x, grect.y, grect.width, grect.height);
}
static void
redraw_all_rects(ZathuraPage* widget, girara_list_t* rectangles)
{
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
GIRARA_LIST_FOREACH(rectangles, zathura_rectangle_t*, iter, rect)
zathura_rectangle_t rectangle = recalc_rectangle(priv->page, *rect);
redraw_rect(widget, &rectangle);
GIRARA_LIST_FOREACH_END(rectangles, zathura_recantgle_t*, iter, rect);
}
zathura_link_t*
zathura_page_widget_link_get(ZathuraPage* widget, unsigned int index)
{
g_return_val_if_fail(widget != NULL, NULL);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
g_return_val_if_fail(priv != NULL, NULL);
if (priv->links.list != NULL && index >= priv->links.offset &&
girara_list_size(priv->links.list) > index - priv->links.offset) {
return girara_list_nth(priv->links.list, index - priv->links.offset);
} else {
return NULL;
}
}
static gboolean
cb_zathura_page_widget_button_press_event(GtkWidget* widget, GdkEventButton* button)
{
g_return_val_if_fail(widget != NULL, false);
g_return_val_if_fail(button != NULL, false);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
if (girara_callback_view_button_press_event(widget, button, priv->zathura->ui.session) == true) {
return true;
}
if (button->button == 1) { /* left click */
if (button->type == GDK_BUTTON_PRESS) {
/* start the selection */
priv->mouse.selection_basepoint.x = button->x;
priv->mouse.selection_basepoint.y = button->y;
priv->mouse.selection.x1 = button->x;
priv->mouse.selection.y1 = button->y;
priv->mouse.selection.x2 = button->x;
priv->mouse.selection.y2 = button->y;
} else if (button->type == GDK_2BUTTON_PRESS || button->type == GDK_3BUTTON_PRESS) {
/* abort the selection */
priv->mouse.selection_basepoint.x = -1;
priv->mouse.selection_basepoint.y = -1;
priv->mouse.selection.x1 = -1;
priv->mouse.selection.y1 = -1;
priv->mouse.selection.x2 = -1;
priv->mouse.selection.y2 = -1;
}
return true;
} else if (button->button == 3) { /* right click */
zathura_page_widget_popup_menu(widget, button);
return true;
}
return false;
}
static gboolean
cb_zathura_page_widget_button_release_event(GtkWidget* widget, GdkEventButton* button)
{
g_return_val_if_fail(widget != NULL, false);
g_return_val_if_fail(button != NULL, false);
if (button->type != GDK_BUTTON_RELEASE || button->button != 1) {
return false;
}
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
zathura_document_t* document = zathura_page_get_document(priv->page);
if (priv->mouse.selection.y2 == -1 && priv->mouse.selection.x2 == -1 ) {
/* simple single click */
/* get links */
if (priv->links.retrieved == false) {
priv->links.list = zathura_page_links_get(priv->page, NULL);
priv->links.retrieved = true;
priv->links.n = (priv->links.list == NULL) ? 0 : girara_list_size(priv->links.list);
}
if (priv->links.list != NULL && priv->links.n > 0) {
GIRARA_LIST_FOREACH(priv->links.list, zathura_link_t*, iter, link)
zathura_rectangle_t rect = recalc_rectangle(priv->page, zathura_link_get_position(link));
if (rect.x1 <= button->x && rect.x2 >= button->x
&& rect.y1 <= button->y && rect.y2 >= button->y) {
zathura_link_evaluate(priv->zathura, link);
}
GIRARA_LIST_FOREACH_END(priv->links.list, zathura_link_t*, iter, link);
}
} else {
redraw_rect(ZATHURA_PAGE(widget), &priv->mouse.selection);
bool synctex = false;
girara_setting_get(priv->zathura->ui.session, "synctex", &synctex);
if (synctex == true && button->state & GDK_CONTROL_MASK) {
/* synctex backwards sync */
double scale = zathura_document_get_scale(document);
int x = button->x / scale, y = button->y / scale;
synctex_edit(priv->zathura, priv->page, x, y);
} else {
zathura_rectangle_t tmp = priv->mouse.selection;
double scale = zathura_document_get_scale(document);
tmp.x1 /= scale;
tmp.x2 /= scale;
tmp.y1 /= scale;
tmp.y2 /= scale;
char* text = zathura_page_get_text(priv->page, tmp, NULL);
if (text != NULL) {
if (strlen(text) > 0) {
/* emit text-selected signal */
g_signal_emit(ZATHURA_PAGE(widget), signals[TEXT_SELECTED], 0, text);
}
g_free(text);
}
}
}
priv->mouse.selection_basepoint.x = -1;
priv->mouse.selection_basepoint.y = -1;
priv->mouse.selection.x1 = -1;
priv->mouse.selection.y1 = -1;
priv->mouse.selection.x2 = -1;
priv->mouse.selection.y2 = -1;
return false;
}
static gboolean
cb_zathura_page_widget_motion_notify(GtkWidget* widget, GdkEventMotion* event)
{
g_return_val_if_fail(widget != NULL, false);
g_return_val_if_fail(event != NULL, false);
if ((event->state & GDK_BUTTON1_MASK) == 0) {
return false;
}
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
zathura_rectangle_t tmp = priv->mouse.selection;
if (event->x < priv->mouse.selection_basepoint.x) {
tmp.x1 = event->x;
tmp.x2 = priv->mouse.selection_basepoint.x;
} else {
tmp.x2 = event->x;
tmp.x1 = priv->mouse.selection_basepoint.x;
}
if (event->y < priv->mouse.selection_basepoint.y) {
tmp.y1 = event->y;
tmp.y2 = priv->mouse.selection_basepoint.y;
} else {
tmp.y1 = priv->mouse.selection_basepoint.y;
tmp.y2 = event->y;
}
redraw_rect(ZATHURA_PAGE(widget), &priv->mouse.selection);
redraw_rect(ZATHURA_PAGE(widget), &tmp);
priv->mouse.selection = tmp;
return false;
}
static void
zathura_page_widget_popup_menu(GtkWidget* widget, GdkEventButton* event)
{
g_return_if_fail(widget != NULL);
g_return_if_fail(event != NULL);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
if (priv->images.retrieved == false) {
priv->images.list = zathura_page_images_get(priv->page, NULL);
priv->images.retrieved = true;
}
if (priv->images.list == NULL) {
return;
}
/* search for underlaying image */
zathura_image_t* image = NULL;
GIRARA_LIST_FOREACH(priv->images.list, zathura_image_t*, iter, image_it)
zathura_rectangle_t rect = recalc_rectangle(priv->page, image_it->position);
if (rect.x1 <= event->x && rect.x2 >= event->x && rect.y1 <= event->y && rect.y2 >= event->y) {
image = image_it;
}
GIRARA_LIST_FOREACH_END(priv->images.list, zathura_image_t*, iter, image_it);
if (image == NULL) {
return;
}
priv->images.current = image;
/* setup menu */
GtkWidget* menu = gtk_menu_new();
typedef struct menu_item_s {
char* text;
void (*callback)(GtkMenuItem*, ZathuraPage*);
} menu_item_t;
menu_item_t menu_items[] = {
{ _("Copy image"), cb_menu_image_copy },
{ _("Save image as"), cb_menu_image_save },
};
for (unsigned int i = 0; i < LENGTH(menu_items); i++) {
GtkWidget* item = gtk_menu_item_new_with_label(menu_items[i].text);
gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
gtk_widget_show(item);
g_signal_connect(G_OBJECT(item), "activate", G_CALLBACK(menu_items[i].callback), ZATHURA_PAGE(widget));
}
/* attach and popup */
int event_button = 0;
int event_time = gtk_get_current_event_time();
if (event != NULL) {
event_button = event->button;
event_time = event->time;
}
gtk_menu_attach_to_widget(GTK_MENU(menu), widget, NULL);
gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, event_button, event_time);
}
static gboolean
cb_zathura_page_widget_popup_menu(GtkWidget* widget)
{
zathura_page_widget_popup_menu(widget, NULL);
return TRUE;
}
static void
cb_menu_image_copy(GtkMenuItem* item, ZathuraPage* page)
{
g_return_if_fail(item != NULL);
g_return_if_fail(page != NULL);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(page);
g_return_if_fail(priv->images.current != NULL);
cairo_surface_t* surface = zathura_page_image_get_cairo(priv->page, priv->images.current, NULL);
if (surface == NULL) {
return;
}
const int width = cairo_image_surface_get_width(surface);
const int height = cairo_image_surface_get_height(surface);
GdkPixbuf* pixbuf = gdk_pixbuf_get_from_surface(surface, 0, 0, width, height);
g_signal_emit(page, signals[IMAGE_SELECTED], 0, pixbuf);
g_object_unref(pixbuf);
cairo_surface_destroy(surface);
/* reset */
priv->images.current = NULL;
}
static void
cb_menu_image_save(GtkMenuItem* item, ZathuraPage* page)
{
g_return_if_fail(item != NULL);
g_return_if_fail(page != NULL);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(page);
g_return_if_fail(priv->images.current != NULL);
g_return_if_fail(priv->images.list != NULL);
/* generate image identifier */
unsigned int page_id = zathura_page_get_index(priv->page) + 1;
unsigned int image_id = 1;
GIRARA_LIST_FOREACH(priv->images.list, zathura_image_t*, iter, image_it)
if (image_it == priv->images.current) {
break;
}
image_id++;
GIRARA_LIST_FOREACH_END(priv->images.list, zathura_image_t*, iter, image_it);
/* set command */
char* export_command = g_strdup_printf(":export image-p%d-%d ", page_id, image_id);
girara_argument_t argument = { 0, export_command };
sc_focus_inputbar(priv->zathura->ui.session, &argument, NULL, 0);
g_free(export_command);
/* reset */
priv->images.current = NULL;
}
void
zathura_page_widget_update_view_time(ZathuraPage* widget)
{
g_return_if_fail(ZATHURA_IS_PAGE(widget));
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
if (zathura_page_get_visibility(priv->page) == true) {
zathura_render_request_update_view_time(priv->render_request);
}
}
bool
zathura_page_widget_have_surface(ZathuraPage* widget)
{
g_return_val_if_fail(ZATHURA_IS_PAGE(widget), false);
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
return priv->surface != NULL;
}
void
zathura_page_widget_abort_render_request(ZathuraPage* widget)
{
g_return_if_fail(ZATHURA_IS_PAGE(widget));
zathura_page_widget_private_t* priv = ZATHURA_PAGE_GET_PRIVATE(widget);
zathura_render_request_abort(priv->render_request);
/* Make sure that if we are not cached and invisible, that there is no
* surface.
*
* TODO: Maybe this should be moved somewhere else. */
if (zathura_page_widget_have_surface(widget) == true &&
priv->cached == false) {
zathura_page_widget_update_surface(widget, NULL);
}
}