diff options
Diffstat (limited to 'ps/gtkgs.c')
| -rw-r--r-- | ps/gtkgs.c | 2740 |
1 files changed, 2740 insertions, 0 deletions
diff --git a/ps/gtkgs.c b/ps/gtkgs.c new file mode 100644 index 0000000..3890c68 --- /dev/null +++ b/ps/gtkgs.c @@ -0,0 +1,2740 @@ +/* Ghostscript widget for GTK/GNOME + * + * Copyright (C) 1998 - 2005 the Free Software Foundation + * + * Authors: Jonathan Blandford, Jaka Mocnik + * + * Based on code by: Federico Mena (Quartic), Szekeres Istvan (Pista) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* +Ghostview interface to ghostscript + +When the GHOSTVIEW environment variable is set, ghostscript draws on +an existing drawable rather than creating its own window. Ghostscript +can be directed to draw on either a window or a pixmap. + +Drawing on a Window + +The GHOSTVIEW environment variable contains the window id of the target +window. The window id is an integer. Ghostscript will use the attributes +of the window to obtain the width, height, colormap, screen, and visual of +the window. The remainder of the information is gotten from the GHOSTVIEW +property on that window. + + +Drawing on a Pixmap + +The GHOSTVIEW environment variable contains a window id and a pixmap id. +They are integers separated by white space. Ghostscript will use the +attributes of the window to obtain the colormap, screen, and visual to use. +The width and height will be obtained from the pixmap. The remainder of the +information, is gotten from the GHOSTVIEW property on the window. In this +case, the property is deleted when read. + +The GHOSTVIEW environment variable + +parameters: window-id [pixmap-id] + +scanf format: "%d %d" + +explanation of parameters: + + window-id: tells ghostscript where to + - read the GHOSTVIEW property + - send events + If pixmap-id is not present, + ghostscript will draw on this window. + + pixmap-id: If present, tells ghostscript that a pixmap will be used + as the final destination for drawing. The window will + not be touched for drawing purposes. + +The GHOSTVIEW property + +type: STRING + +parameters: + + bpixmap orient llx lly urx ury xdpi ydpi [left bottom top right] + +scanf format: "%d %d %d %d %d %d %f %f %d %d %d %d" + +explanation of parameters: + + bpixmap: pixmap id of the backing pixmap for the window. If no + pixmap is to be used, this parameter should be zero. This + parameter must be zero when drawing on a pixmap. + + orient: orientation of the page. The number represents clockwise + rotation of the paper in degrees. Permitted values are + 0, 90, 180, 270. + + llx, lly, urx, ury: Bounding box of the drawable. The bounding box + is specified in PostScript points in default user coordinates. + + xdpi, ydpi: Resolution of window. (This can be derived from the + other parameters, but not without roundoff error. These + values are included to avoid this error.) + + left, bottom, top, right: (optional) + Margins around the window. The margins extend the imageable + area beyond the boundaries of the window. This is primarily + used for popup zoom windows. I have encountered several + instances of PostScript programs that position themselves + with respect to the imageable area. The margins are specified + in PostScript points. If omitted, the margins are assumed to + be 0. + +Events from ghostscript + +If the final destination is a pixmap, the client will get a property notify +event when ghostscript reads the GHOSTVIEW property causing it to be deleted. + +Ghostscript sends events to the window where it read the GHOSTVIEW property. +These events are of type ClientMessage. The message_type is set to +either PAGE or DONE. The first long data value gives the window to be used +to send replies to ghostscript. The second long data value gives the primary +drawable. If rendering to a pixmap, it is the primary drawable. If rendering +to a window, the backing pixmap is the primary drawable. If no backing pixmap +is employed, then the window is the primary drawable. This field is necessary +to distinguish multiple ghostscripts rendering to separate pixmaps where the +GHOSTVIEW property was placed on the same window. + +The PAGE message indicates that a "page" has completed. Ghostscript will +wait until it receives a ClientMessage whose message_type is NEXT before +continuing. + +The DONE message indicates that ghostscript has finished processing. + +*/ + +#include "config.h" +#include <string.h> +#include <stdlib.h> +#include <signal.h> +#include <gtk/gtk.h> +#include <gtk/gtkobject.h> +#include <gdk/gdkprivate.h> +#include <gdk/gdkx.h> +#include <gdk/gdk.h> +#ifdef HAVE_XINERAMA +# include <gdk/gdkx.h> +# include <X11/extensions/Xinerama.h> +#endif /* HAVE_XINERAMA */ +#include <X11/Intrinsic.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdlib.h> +#include <errno.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <stdio.h> +#include <math.h> + +#include "gtkgs.h" +#include "ggvutils.h" +#include "ps.h" +#include "gsdefaults.h" + +#ifdef HAVE_LOCALE_H +# include <locale.h> +#endif + +/* if POSIX O_NONBLOCK is not available, use O_NDELAY */ +#if !defined(O_NONBLOCK) && defined(O_NDELAY) +# define O_NONBLOCK O_NDELAY +#endif + +#define GTK_GS_WATCH_INTERVAL 1000 +#define GTK_GS_WATCH_TIMEOUT 2 + +#define MAX_BUFSIZE 1024 + +enum { INTERPRETER_MESSAGE, INTERPRETER_ERROR, LAST_SIGNAL }; + +static gboolean broken_pipe = FALSE; + +static void +catchPipe(int i) +{ + broken_pipe = True; +} + +/* Forward declarations */ +static void gtk_gs_init(GtkGS * gs); +static void gtk_gs_class_init(GtkGSClass * klass); +static void gtk_gs_destroy(GtkObject * object); +static void gtk_gs_realize(GtkWidget * widget); +static void gtk_gs_size_request(GtkWidget * widget, + GtkRequisition * requisition); +static void gtk_gs_size_allocate(GtkWidget * widget, + GtkAllocation * allocation); +static gint gtk_gs_widget_event(GtkWidget * widget, GdkEvent * event, + gpointer data); +static void gtk_gs_value_adjustment_changed(GtkAdjustment * adjustment, + gpointer data); +static void gtk_gs_interpreter_message(GtkGS * gs, gchar * msg, + gpointer user_data); +static void gtk_gs_emit_error_msg(GtkGS * gs, const gchar * msg); +static void gtk_gs_set_adjustments(GtkGS * gs, GtkAdjustment * hadj, + GtkAdjustment * vadj); +static void send_ps(GtkGS * gs, long begin, unsigned int len, gboolean close); +static void set_up_page(GtkGS * gs); +static void close_pipe(int p[2]); +static void interpreter_failed(GtkGS * gs); +static float compute_xdpi(void); +static float compute_ydpi(void); +static gboolean compute_size(GtkGS * gs); +static void output(gpointer data, gint source, GdkInputCondition condition); +static void input(gpointer data, gint source, GdkInputCondition condition); +static void stop_interpreter(GtkGS * gs); +static gint start_interpreter(GtkGS * gs); +gboolean computeSize(void); + +static GtkWidgetClass *parent_class = NULL; + +static GtkGSClass *gs_class = NULL; + +static gint gtk_gs_signals[LAST_SIGNAL] = { 0 }; + +/* Static, private functions */ + +static void +ggv_marshaller_VOID__POINTER(GClosure * closure, + GValue * return_value, + guint n_param_values, + const GValue * param_values, + gpointer invocation_hint, gpointer marshal_data) +{ + typedef void (*GMarshalFunc_VOID__POINTER) (gpointer data1, + gpointer arg_1, gpointer data2); + register GMarshalFunc_VOID__POINTER callback; + register GCClosure *cc = (GCClosure *) closure; + register gpointer data1, data2; + + g_return_if_fail(n_param_values == 2); + + if(G_CCLOSURE_SWAP_DATA(closure)) { + data1 = closure->data; + data2 = g_value_peek_pointer(param_values + 0); + } + else { + data1 = g_value_peek_pointer(param_values + 0); + data2 = closure->data; + } + callback = + (GMarshalFunc_VOID__POINTER) (marshal_data ? marshal_data : cc->callback); + + callback(data1, g_value_get_pointer(param_values + 1), data2); +} + +static void +ggv_marshaller_VOID__INT(GClosure * closure, + GValue * return_value, + guint n_param_values, + const GValue * param_values, + gpointer invocation_hint, gpointer marshal_data) +{ + typedef void (*GMarshalFunc_VOID__INT) (gpointer data1, + gint arg_1, gpointer data2); + register GMarshalFunc_VOID__INT callback; + register GCClosure *cc = (GCClosure *) closure; + register gpointer data1, data2; + + g_return_if_fail(n_param_values == 2); + + if(G_CCLOSURE_SWAP_DATA(closure)) { + data1 = closure->data; + data2 = g_value_peek_pointer(param_values + 0); + } + else { + data1 = g_value_peek_pointer(param_values + 0); + data2 = closure->data; + } + callback = + (GMarshalFunc_VOID__INT) (marshal_data ? marshal_data : cc->callback); + + callback(data1, g_value_get_int(param_values + 1), data2); +} + +static void +ggv_marshaller_VOID__POINTER_POINTER(GClosure * closure, + GValue * return_value, + guint n_param_values, + const GValue * param_values, + gpointer invocation_hint, + gpointer marshal_data) +{ + typedef void (*GMarshalFunc_VOID__POINTER_POINTER) (gpointer data1, + gpointer arg_1, + gpointer arg_2, + gpointer data2); + register GMarshalFunc_VOID__POINTER_POINTER callback; + register GCClosure *cc = (GCClosure *) closure; + register gpointer data1, data2; + + g_return_if_fail(n_param_values == 3); + + if(G_CCLOSURE_SWAP_DATA(closure)) { + data1 = closure->data; + data2 = g_value_peek_pointer(param_values + 0); + } + else { + data1 = g_value_peek_pointer(param_values + 0); + data2 = closure->data; + } + callback = + (GMarshalFunc_VOID__POINTER_POINTER) (marshal_data ? marshal_data : cc-> + callback); + + callback(data1, + g_value_get_pointer(param_values + 1), + g_value_get_pointer(param_values + 2), data2); +} + +static void +gtk_gs_init(GtkGS * gs) +{ + gs->bpixmap = NULL; + gs->use_bpixmap = TRUE; + + gs->current_page = -2; + gs->disable_start = FALSE; + gs->interpreter_pid = -1; + + gs->width = -1; + gs->height = -1; + gs->busy = FALSE; + gs->changed = FALSE; + gs->gs_scanstyle = 0; + gs->gs_filename = 0; + gs->gs_filename_dsc = 0; + gs->gs_filename_unc = 0; + + broken_pipe = FALSE; + + gs->structured_doc = FALSE; + gs->reading_from_pipe = FALSE; + gs->send_filename_to_gs = FALSE; + + gs->doc = NULL; + gs->loaded = FALSE; + + gs->interpreter_input = -1; + gs->interpreter_output = -1; + gs->interpreter_err = -1; + gs->interpreter_input_id = 0; + gs->interpreter_output_id = 0; + gs->interpreter_error_id = 0; + + gs->ps_input = NULL; + gs->input_buffer = NULL; + gs->input_buffer_ptr = NULL; + gs->bytes_left = 0; + gs->buffer_bytes_left = 0; + + gs->llx = 0; + gs->lly = 0; + gs->urx = 0; + gs->ury = 0; + gs->xdpi = compute_xdpi(); + gs->ydpi = compute_ydpi(); + + gs->left_margin = 0; + gs->top_margin = 0; + gs->right_margin = 0; + gs->bottom_margin = 0; + + /* Set user defined defaults */ + gs->override_orientation = gtk_gs_defaults_get_override_orientation(); + gs->fallback_orientation = gtk_gs_defaults_get_orientation(); + gs->zoom_factor = gtk_gs_defaults_get_zoom_factor(); + gs->default_size = gtk_gs_defaults_get_size(); + gs->antialiased = gtk_gs_defaults_get_antialiased(); + gs->override_size = gtk_gs_defaults_get_override_size(); + gs->respect_eof = gtk_gs_defaults_get_respect_eof(); + gs->show_scroll_rect = gtk_gs_defaults_get_show_scroll_rect(); + gs->scroll_step = gtk_gs_defaults_get_scroll_step(); + gs->zoom_mode = gtk_gs_defaults_get_zoom_mode(); + + gs->scroll_start_x = gs->scroll_start_y = -1; + + gs->gs_status = _("No document loaded."); +} + +static void +gtk_gs_class_init(GtkGSClass * klass) +{ + GtkObjectClass *object_class; + GObjectClass *gobject_class; + GtkWidgetClass *widget_class; + + object_class = (GtkObjectClass *) klass; + gobject_class = (GObjectClass *) klass; + widget_class = (GtkWidgetClass *) klass; + parent_class = gtk_type_class(gtk_widget_get_type()); + gs_class = klass; + + gtk_gs_signals[INTERPRETER_MESSAGE] = g_signal_new("interpreter_message", + G_TYPE_FROM_CLASS + (object_class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET + (GtkGSClass, + interpreter_message), + NULL, NULL, + ggv_marshaller_VOID__POINTER, + G_TYPE_NONE, 1, + G_TYPE_POINTER); + gtk_gs_signals[INTERPRETER_ERROR] = + g_signal_new("interpreter_error", G_TYPE_FROM_CLASS(object_class), + G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET(GtkGSClass, + interpreter_error), + NULL, NULL, ggv_marshaller_VOID__INT, G_TYPE_NONE, 1, + G_TYPE_INT); + + object_class->destroy = gtk_gs_destroy; + + widget_class->realize = gtk_gs_realize; + widget_class->size_request = gtk_gs_size_request; + widget_class->size_allocate = gtk_gs_size_allocate; + widget_class->set_scroll_adjustments_signal = + g_signal_new("set_scroll_adjustments", + G_TYPE_FROM_CLASS(object_class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET(GtkGSClass, set_scroll_adjustments), + NULL, + NULL, + ggv_marshaller_VOID__POINTER_POINTER, + G_TYPE_NONE, 2, G_TYPE_POINTER, G_TYPE_POINTER); + + /* Create atoms */ + klass->gs_atom = gdk_atom_intern("GHOSTVIEW", FALSE); + klass->gs_colors_atom = gdk_atom_intern("GHOSTVIEW_COLORS", FALSE); + klass->next_atom = gdk_atom_intern("NEXT", FALSE); + klass->page_atom = gdk_atom_intern("PAGE", FALSE); + klass->done_atom = gdk_atom_intern("DONE", FALSE); + klass->string_atom = gdk_atom_intern("STRING", FALSE); + + /* a default handler for "interpreter_message" signal */ + klass->interpreter_message = gtk_gs_interpreter_message; + /* supply a scrollable interface */ + klass->set_scroll_adjustments = gtk_gs_set_adjustments; + + gtk_gs_defaults_load(); +} + +/* Clean all memory and temporal files */ +static void +gtk_gs_cleanup(GtkGS * gs) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + stop_interpreter(gs); + + if(gs->gs_psfile) { + fclose(gs->gs_psfile); + gs->gs_psfile = NULL; + } + if(gs->gs_filename) { + g_free(gs->gs_filename); + gs->gs_filename = NULL; + } + if(gs->doc) { + psfree(gs->doc); + gs->doc = NULL; + } + if(gs->gs_filename_dsc) { + unlink(gs->gs_filename_dsc); + g_free(gs->gs_filename_dsc); + gs->gs_filename_dsc = NULL; + } + if(gs->gs_filename_unc) { + unlink(gs->gs_filename_unc); + g_free(gs->gs_filename_unc); + gs->gs_filename_unc = NULL; + } + if(gs->pstarget && gdk_window_is_visible(gs->pstarget)) + gdk_window_hide(gs->pstarget); + gs->current_page = -1; + gs->loaded = FALSE; + gs->llx = 0; + gs->lly = 0; + gs->urx = 0; + gs->ury = 0; + set_up_page(gs); +} + +/* free message as it was allocated in output() */ +static void +gtk_gs_interpreter_message(GtkGS * gs, gchar * msg, gpointer user_data) +{ + gdk_pointer_ungrab(GDK_CURRENT_TIME); + if(strstr(msg, "Error:")) { + gs->gs_status = _("File is not a valid PostScript document."); + gtk_gs_cleanup(gs); + g_signal_emit_by_name(G_OBJECT(gs), "interpreter_error", 1, NULL); + } + g_free(msg); +} + +static void +gtk_gs_destroy(GtkObject * object) +{ + GtkGS *gs; + + g_return_if_fail(object != NULL); + g_return_if_fail(GTK_IS_GS(object)); + + gs = GTK_GS(object); + + gtk_gs_cleanup(gs); + + if(gs->input_buffer) { + g_free(gs->input_buffer); + gs->input_buffer = NULL; + } + if(gs->hadj) { + g_signal_handlers_disconnect_matched(G_OBJECT(gs->hadj), + G_SIGNAL_MATCH_DATA, + 0, 0, NULL, NULL, gs); + gtk_object_unref(GTK_OBJECT(gs->hadj)); + gs->hadj = NULL; + } + if(gs->vadj) { + g_signal_handlers_disconnect_matched(G_OBJECT(gs->vadj), + G_SIGNAL_MATCH_DATA, + 0, 0, NULL, NULL, gs); + gtk_object_unref(GTK_OBJECT(gs->vadj)); + gs->vadj = NULL; + } + + if(GTK_OBJECT_CLASS(parent_class)->destroy) + (*GTK_OBJECT_CLASS(parent_class)->destroy) (object); +} + +/* FIXME: I'm not sure if all this is supposed to be here + * this is just a quick hack so that this can be called whenever + * something changes. + */ +static void +gtk_gs_munge_adjustments(GtkGS * gs) +{ + gint x, y; + + gdk_window_get_position(gs->pstarget, &x, &y); + + /* + * This is a bit messy: + * we want to make sure that we do the right thing if dragged. + */ + if(gs->widget.allocation.width >= gs->width || + gs->zoom_mode != GTK_GS_ZOOM_ABSOLUTE) { + x = (gs->widget.allocation.width - gs->width) / 2; + gs->hadj->value = 0.0; + gs->hadj->page_size = 1.0; + gs->hadj->step_increment = 1.0; + } + else { + if(x > 0) + x = 0; + else if(gs->widget.allocation.width > x + gs->width) + x = gs->widget.allocation.width - gs->width; + gs->hadj->page_size = ((gfloat) gs->widget.allocation.width) / gs->width; + gs->hadj->page_increment = gs->hadj->page_size * 0.9; + gs->hadj->step_increment = gs->scroll_step * gs->hadj->page_size; + gs->hadj->value = -((gfloat) x) / gs->width; + } + if(gs->widget.allocation.height >= gs->height || + gs->zoom_mode == GTK_GS_ZOOM_FIT_PAGE) { + y = (gs->widget.allocation.height - gs->height) / 2; + gs->vadj->value = 0.0; + gs->vadj->page_size = 1.0; + gs->vadj->step_increment = 1.0; + } + else { + if(y > 0) + y = 0; + else if(gs->widget.allocation.height > y + gs->height) + y = gs->widget.allocation.height - gs->height; + gs->vadj->page_size = ((gfloat) gs->widget.allocation.height) / gs->height; + gs->vadj->page_increment = gs->vadj->page_size * 0.9; + gs->vadj->step_increment = gs->scroll_step * gs->vadj->page_size; + gs->vadj->value = -((gfloat) y) / gs->height; + } + + gdk_window_move(gs->pstarget, x, y); + + gtk_adjustment_changed(gs->hadj); + gtk_adjustment_changed(gs->vadj); +} + +static void +gtk_gs_realize(GtkWidget * widget) +{ + GtkGS *gs; + GdkWindowAttr attributes; + gint attributes_mask; + + g_return_if_fail(widget != NULL); + g_return_if_fail(GTK_IS_GS(widget)); + + gs = GTK_GS(widget); + + /* we set up the main widget! */ + GTK_WIDGET_SET_FLAGS(widget, GTK_REALIZED); + attributes.window_type = GDK_WINDOW_CHILD; + attributes.x = widget->allocation.x; + attributes.y = widget->allocation.y; + attributes.width = widget->allocation.width; + attributes.height = widget->allocation.height; + attributes.wclass = GDK_INPUT_OUTPUT; + attributes.visual = gtk_widget_get_visual(widget); + attributes.colormap = gtk_widget_get_colormap(widget); + attributes.event_mask = gtk_widget_get_events(widget) | GDK_EXPOSURE_MASK; + attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; + + widget->window = + gdk_window_new(widget->parent->window, &attributes, attributes_mask); + gdk_window_set_user_data(widget->window, gs); + widget->style = gtk_style_attach(widget->style, widget->window); + gtk_style_set_background(widget->style, widget->window, GTK_STATE_NORMAL); + + /* now we set up the child window. This is the one that ps actually draws too. */ + attributes.x = 0; + attributes.y = 0; + + gs->pstarget = gdk_window_new(widget->window, &attributes, attributes_mask); + gdk_window_set_user_data(gs->pstarget, widget); + gdk_window_clear(gs->pstarget); + gtk_style_set_background(widget->style, gs->pstarget, GTK_STATE_ACTIVE); + gs->psgc = gdk_gc_new(gs->pstarget); + gdk_gc_set_function(gs->psgc, GDK_INVERT); + + gs->width = 0; + gs->height = 0; + + gtk_gs_set_page_size(gs, -1, 0); + + if((gs->width > 0) && (gs->height > 0) && GTK_WIDGET_REALIZED(gs)) { + gtk_gs_munge_adjustments(gs); + } + + g_signal_connect(G_OBJECT(widget), "event", + G_CALLBACK(gtk_gs_widget_event), gs); + + gtk_gs_goto_page(gs, gs->current_page); +} + +static void +gtk_gs_size_request(GtkWidget * widget, GtkRequisition * requisition) +{ + GtkGS *gs = GTK_GS(widget); + + compute_size(gs); + requisition->width = gs->width; + requisition->height = gs->height; +} + +static void +gtk_gs_size_allocate(GtkWidget * widget, GtkAllocation * allocation) +{ + GtkGS *gs = GTK_GS(widget); + GdkEventConfigure event; + + g_return_if_fail(widget != NULL); + g_return_if_fail(GTK_IS_GS(widget)); + g_return_if_fail(allocation != NULL); + + widget->allocation = *allocation; + if(GTK_WIDGET_REALIZED(widget)) { + gdk_window_move_resize(widget->window, + allocation->x, allocation->y, + allocation->width, allocation->height); + + event.type = GDK_CONFIGURE; + event.window = widget->window; + event.x = allocation->x; + event.y = allocation->y; + event.width = allocation->width; + event.height = allocation->height; + gtk_widget_event(widget, (GdkEvent *) & event); + } + + /* + * update the adjustment if necessary (ie. a resize); + */ +#if 0 + if(gs->zoom_mode != GTK_GS_ZOOM_ABSOLUTE) { + gtk_gs_set_zoom(gs, 0.0); + } +#endif + + if(GTK_WIDGET_REALIZED(gs)) { + gtk_gs_munge_adjustments(gs); + } + + gtk_gs_goto_page(gs, gs->current_page); +} + +static gboolean +gtk_gs_widget_event(GtkWidget * widget, GdkEvent * event, gpointer data) +{ + GtkGS *gs = (GtkGS *) data; + if(event->type != GDK_CLIENT_EVENT) + return FALSE; + + /* the first long is the window to communicate with gs, + only if event if client_event */ + gs->message_window = event->client.data.l[0]; + + if(event->client.message_type == gs_class->page_atom) { + gs->busy = FALSE; + } + return TRUE; +} + + +static void +gtk_gs_value_adjustment_changed(GtkAdjustment * adjustment, gpointer data) +{ + GtkGS *gs; + gint x, y, width, height, depth; + gint newx, newy; + + g_return_if_fail(adjustment != NULL); + g_return_if_fail(data != NULL); + gs = GTK_GS(data); + if(gs->bpixmap == NULL) + return; + +#if 0 + g_print("Adjustment %c: val = %f, page = %f, upper = %f, lower = %f\n", + (adjustment == gs->hadj) ? 'H' : 'V', + adjustment->value, adjustment->page_size, + adjustment->upper, adjustment->lower); +#endif + + gdk_window_get_geometry(gs->pstarget, &x, &y, &width, &height, &depth); + if(gs->width <= gs->widget.allocation.width) + newx = (gs->widget.allocation.width - gs->width) / 2; + else + newx = -gs->hadj->value * gs->width; + if(gs->height <= gs->widget.allocation.height) + newy = (gs->widget.allocation.height - gs->height) / 2; + else + newy = -gs->vadj->value * gs->height; + + gdk_window_move(gs->pstarget, newx, newy); +} + +void +gtk_gs_set_center(GtkGS * gs, gfloat hval, gfloat vval) +{ + if(hval <= gs->hadj->upper - gs->hadj->page_size / 2 && + hval >= gs->hadj->lower + gs->hadj->page_size / 2) + gtk_adjustment_set_value(gs->hadj, hval); + if(vval <= gs->vadj->upper - gs->vadj->page_size / 2 && + vval >= gs->vadj->lower + gs->vadj->page_size / 2) + gtk_adjustment_set_value(gs->vadj, vval); +} + +static void +send_ps(GtkGS * gs, long begin, unsigned int len, gboolean close) +{ + struct record_list *ps_new; + + if(gs->interpreter_input < 0) { + g_critical("No pipe to gs: error in send_ps()."); + return; + } + + ps_new = (struct record_list *) g_malloc(sizeof(struct record_list)); + ps_new->fp = gs->gs_psfile; + ps_new->begin = begin; + ps_new->len = len; + ps_new->seek_needed = TRUE; + ps_new->close = close; + ps_new->next = NULL; + + if(gs->input_buffer == NULL) { + gs->input_buffer = g_malloc(MAX_BUFSIZE); + } + + if(gs->ps_input == NULL) { + gs->input_buffer_ptr = gs->input_buffer; + gs->bytes_left = len; + gs->buffer_bytes_left = 0; + gs->ps_input = ps_new; + gs->interpreter_input_id = + gdk_input_add(gs->interpreter_input, GDK_INPUT_WRITE, input, gs); + } + else { + struct record_list *p = gs->ps_input; + while(p->next != NULL) { + p = p->next; + } + p->next = ps_new; + } +} + +static void +set_up_page(GtkGS * gs) + /* + * This is used to prepare the widget internally for + * a new document. It sets gs->pstarget to the + * correct size and position, and updates the + * adjustments appropriately. + * + * It is not meant to be used every time a specific page + * is selected. + * + * NOTE: It expects the widget is realized. + */ +{ + guint orientation; + char buf[1024]; + GdkPixmap *pprivate; + GdkColormap *colormap; + GdkGC *fill; + GdkColor white = { 0, 0xFFFF, 0xFFFF, 0xFFFF }; /* pixel, r, g, b */ + +#ifdef HAVE_LOCALE_H + char *savelocale; +#endif + + if(!GTK_WIDGET_REALIZED(gs)) + return; + + /* Do we have to check if the actual geometry changed? */ + + stop_interpreter(gs); + + orientation = gtk_gs_get_orientation(gs); + + if(compute_size(gs)) { + gdk_flush(); + + /* clear new pixmap (set to white) */ + fill = gdk_gc_new(gs->pstarget); + if(fill) { + colormap = gtk_widget_get_colormap(GTK_WIDGET(gs)); + gdk_color_alloc(colormap, &white); + gdk_gc_set_foreground(fill, &white); + + if(gs->use_bpixmap && gs->width > 0 && gs->height > 0) { + if(gs->bpixmap) { + gdk_drawable_unref(gs->bpixmap); + gs->bpixmap = NULL; + } + + gs->bpixmap = gdk_pixmap_new(gs->pstarget, gs->width, gs->height, -1); + + gdk_draw_rectangle(gs->bpixmap, fill, TRUE, + 0, 0, gs->width, gs->height); + + gdk_window_set_back_pixmap(gs->pstarget, gs->bpixmap, FALSE); + } + else { + gdk_draw_rectangle(gs->pstarget, fill, TRUE, + 0, 0, gs->width, gs->height); + } + gdk_gc_unref(fill); + + gdk_window_resize(gs->pstarget, gs->width, gs->height); + + gdk_flush(); + } + } + +#ifdef HAVE_LOCALE_H + /* gs needs floating point parameters with '.' as decimal point + * while some (european) locales use ',' instead, so we set the + * locale for this snprintf to "C". + */ + savelocale = setlocale(LC_NUMERIC, "C"); +#endif + pprivate = (GdkPixmap *) gs->bpixmap; + + g_snprintf(buf, 1024, "%ld %d %d %d %d %d %f %f %d %d %d %d", + pprivate ? gdk_x11_drawable_get_xid(pprivate) : 0L, + orientation * 90, + gs->llx, + gs->lly, + gs->urx, + gs->ury, + gs->xdpi * gs->zoom_factor, + gs->ydpi * gs->zoom_factor, + gs->left_margin, + gs->bottom_margin, gs->right_margin, gs->top_margin); + +#ifdef HAVE_LOCALE_H + setlocale(LC_NUMERIC, savelocale); +#endif + gdk_property_change(gs->pstarget, + gs_class->gs_atom, + gs_class->string_atom, + 8, GDK_PROP_MODE_REPLACE, buf, strlen(buf)); + gdk_flush(); +} + +static void +close_pipe(int p[2]) +{ + if(p[0] != -1) + close(p[0]); + if(p[1] != -1) + close(p[1]); +} + +static gboolean +is_interpreter_ready(GtkGS * gs) +{ + return (gs->interpreter_pid != -1 && !gs->busy && gs->ps_input == NULL); +} + +static void +interpreter_failed(GtkGS * gs) +{ + stop_interpreter(gs); +} + +static void +output(gpointer data, gint source, GdkInputCondition condition) +{ + char buf[MAX_BUFSIZE + 1], *msg; + guint bytes = 0; + GtkGS *gs = GTK_GS(data); + + if(source == gs->interpreter_output) { + bytes = read(gs->interpreter_output, buf, MAX_BUFSIZE); + if(bytes == 0) { /* EOF occurred */ + close(gs->interpreter_output); + gs->interpreter_output = -1; + gdk_input_remove(gs->interpreter_output_id); + return; + } + else if(bytes == -1) { + /* trouble... */ + interpreter_failed(gs); + return; + } + if(gs->interpreter_err == -1) { + stop_interpreter(gs); + } + } + else if(source == gs->interpreter_err) { + bytes = read(gs->interpreter_err, buf, MAX_BUFSIZE); + if(bytes == 0) { /* EOF occurred */ + close(gs->interpreter_err); + gs->interpreter_err = -1; + gdk_input_remove(gs->interpreter_error_id); + return; + } + else if(bytes == -1) { + /* trouble... */ + interpreter_failed(gs); + return; + } + if(gs->interpreter_output == -1) { + stop_interpreter(gs); + } + } + if(bytes > 0) { + buf[bytes] = '\0'; + msg = g_strdup(buf); + gtk_signal_emit(GTK_OBJECT(gs), gtk_gs_signals[INTERPRETER_MESSAGE], msg); + } +} + +static void +input(gpointer data, gint source, GdkInputCondition condition) +{ + GtkGS *gs = GTK_GS(data); + int bytes_written; + void (*oldsig) (int); + oldsig = signal(SIGPIPE, catchPipe); + + do { + if(gs->buffer_bytes_left == 0) { + /* Get a new section if required */ + if(gs->ps_input && gs->bytes_left == 0) { + struct record_list *ps_old = gs->ps_input; + gs->ps_input = ps_old->next; + if(ps_old->close && NULL != ps_old->fp) + fclose(ps_old->fp); + g_free((char *) ps_old); + } + /* Have to seek at the beginning of each section */ + if(gs->ps_input && gs->ps_input->seek_needed) { + fseek(gs->ps_input->fp, gs->ps_input->begin, SEEK_SET); + gs->ps_input->seek_needed = FALSE; + gs->bytes_left = gs->ps_input->len; + } + + if(gs->bytes_left > MAX_BUFSIZE) { + gs->buffer_bytes_left = + fread(gs->input_buffer, sizeof(char), MAX_BUFSIZE, gs->ps_input->fp); + } + else if(gs->bytes_left > 0) { + gs->buffer_bytes_left = + fread(gs->input_buffer, + sizeof(char), gs->bytes_left, gs->ps_input->fp); + } + else { + gs->buffer_bytes_left = 0; + } + if(gs->bytes_left > 0 && gs->buffer_bytes_left == 0) { + interpreter_failed(gs); /* Error occurred */ + } + gs->input_buffer_ptr = gs->input_buffer; + gs->bytes_left -= gs->buffer_bytes_left; + } + + if(gs->buffer_bytes_left > 0) { + /* g_print (" writing: %s\n",gs->input_buffer_ptr); */ + + bytes_written = write(gs->interpreter_input, + gs->input_buffer_ptr, gs->buffer_bytes_left); + + if(broken_pipe) { + gtk_gs_emit_error_msg(gs, g_strdup(_("Broken pipe."))); + broken_pipe = FALSE; + interpreter_failed(gs); + } + else if(bytes_written == -1) { + if((errno != EWOULDBLOCK) && (errno != EAGAIN)) { + interpreter_failed(gs); /* Something bad happened */ + } + } + else { + gs->buffer_bytes_left -= bytes_written; + gs->input_buffer_ptr += bytes_written; + } + } + } + while(gs->ps_input && gs->buffer_bytes_left == 0); + + signal(SIGPIPE, oldsig); + + if(gs->ps_input == NULL && gs->buffer_bytes_left == 0) { + if(gs->interpreter_input_id != 0) { + gdk_input_remove(gs->interpreter_input_id); + gs->interpreter_input_id = 0; + } + } +} + +static int +start_interpreter(GtkGS * gs) +{ + int std_in[2] = { -1, -1 }; /* pipe to interp stdin */ + int std_out[2]; /* pipe from interp stdout */ + int std_err[2]; /* pipe from interp stderr */ + +#define NUM_ARGS 100 +#define NUM_GS_ARGS (NUM_ARGS - 20) +#define NUM_ALPHA_ARGS 10 + + char *argv[NUM_ARGS], *dir, *gv_env; + char **gs_args, **alpha_args = NULL; + int argc = 0, i; + + if(!gs->gs_filename) + return 0; + + stop_interpreter(gs); + + if(gs->disable_start == TRUE) + return 0; + + /* set up the args... */ + gs_args = g_strsplit(gtk_gs_defaults_get_interpreter_cmd(), " ", NUM_GS_ARGS); + for(i = 0; i < NUM_GS_ARGS && gs_args[i]; i++, argc++) + argv[argc] = gs_args[i]; + + if(gs->antialiased) { + if(strlen(gtk_gs_defaults_get_alpha_parameters()) == 0) + alpha_args = g_strsplit(ALPHA_PARAMS, " ", NUM_ALPHA_ARGS); + else + alpha_args = g_strsplit(gtk_gs_defaults_get_alpha_parameters(), + " ", NUM_ALPHA_ARGS); + for(i = 0; i < NUM_ALPHA_ARGS && alpha_args[i]; i++, argc++) + argv[argc] = alpha_args[i]; + } + else + argv[argc++] = "-sDEVICE=x11"; + argv[argc++] = "-dNOPAUSE"; + argv[argc++] = "-dQUIET"; + /* I assume we do _not_ want to change this... (: */ + argv[argc++] = "-dSAFER"; + + /* set up the pipes */ + if(gs->send_filename_to_gs) { + argv[argc++] = GTK_GS_GET_PS_FILE(gs); + argv[argc++] = "-c"; + argv[argc++] = "quit"; + } + else + argv[argc++] = "-"; + + argv[argc++] = NULL; + + if(!gs->reading_from_pipe && !gs->send_filename_to_gs) { + if(pipe(std_in) == -1) { + g_critical("Unable to open pipe to Ghostscript."); + return -1; + } + } + if(pipe(std_out) == -1) { + close_pipe(std_in); + return -1; + } + if(pipe(std_err) == -1) { + close_pipe(std_in); + close_pipe(std_out); + return -1; + } + + gs->busy = TRUE; + gs->interpreter_pid = fork(); + switch (gs->interpreter_pid) { + case -1: /* error */ + close_pipe(std_in); + close_pipe(std_out); + close_pipe(std_err); + return -2; + break; + case 0: /* child */ + close(std_out[0]); + dup2(std_out[1], 1); + close(std_out[1]); + + close(std_err[0]); + dup2(std_err[1], 2); + close(std_err[1]); + + if(!gs->reading_from_pipe) { + if(gs->send_filename_to_gs) { + int stdinfd; + /* just in case gs tries to read from stdin */ + stdinfd = open("/dev/null", O_RDONLY); + if(stdinfd != 0) { + dup2(stdinfd, 0); + close(stdinfd); + } + } + else { + close(std_in[1]); + dup2(std_in[0], 0); + close(std_in[0]); + } + } + + gv_env = g_strdup_printf("GHOSTVIEW=%ld", + gdk_x11_drawable_get_xid(gs->pstarget)); + putenv(gv_env); + + /* change to directory where the input file is. This helps + * with postscript-files which include other files using + * a relative path */ + dir = g_path_get_dirname(gs->gs_filename); + chdir(dir); + g_free(dir); + + execvp(argv[0], argv); + + /* Notify error */ + g_print("Unable to execute [%s]\n", argv[0]); + g_strfreev(gs_args); + g_free(gv_env); + if(alpha_args) + g_strfreev(alpha_args); + _exit(1); + break; + default: /* parent */ + if(!gs->send_filename_to_gs && !gs->reading_from_pipe) { + int result; + close(std_in[0]); + /* use non-blocking IO for pipe to ghostscript */ + result = fcntl(std_in[1], F_GETFL, 0); + fcntl(std_in[1], F_SETFL, result | O_NONBLOCK); + gs->interpreter_input = std_in[1]; + } + else { + gs->interpreter_input = -1; + } + close(std_out[1]); + gs->interpreter_output = std_out[0]; + close(std_err[1]); + gs->interpreter_err = std_err[0]; + gs->interpreter_output_id = + gdk_input_add(std_out[0], GDK_INPUT_READ, output, gs); + gs->interpreter_error_id = + gdk_input_add(std_err[0], GDK_INPUT_READ, output, gs); + break; + } + return TRUE; +} + +static void +stop_interpreter(GtkGS * gs) +{ + if(gs->interpreter_pid > 0) { + int status = 0; + kill(gs->interpreter_pid, SIGTERM); + while((wait(&status) == -1) && (errno == EINTR)) ; + gs->interpreter_pid = -1; + if(status == 1) { + gtk_gs_cleanup(gs); + gs->gs_status = _("Interpreter failed."); + g_signal_emit_by_name(G_OBJECT(gs), "interpreter_error", status); + } + } + + if(gs->interpreter_input >= 0) { + close(gs->interpreter_input); + gs->interpreter_input = -1; + if(gs->interpreter_input_id != 0) { + gdk_input_remove(gs->interpreter_input_id); + gs->interpreter_input_id = 0; + } + while(gs->ps_input) { + struct record_list *ps_old = gs->ps_input; + gs->ps_input = gs->ps_input->next; + if(ps_old->close && NULL != ps_old->fp) + fclose(ps_old->fp); + g_free((char *) ps_old); + } + } + + if(gs->interpreter_output >= 0) { + close(gs->interpreter_output); + gs->interpreter_output = -1; + if(gs->interpreter_output_id) { + gdk_input_remove(gs->interpreter_output_id); + gs->interpreter_output_id = 0; + } + } + + if(gs->interpreter_err >= 0) { + close(gs->interpreter_err); + gs->interpreter_err = -1; + if(gs->interpreter_error_id) { + gdk_input_remove(gs->interpreter_error_id); + gs->interpreter_error_id = 0; + } + } + + gs->busy = FALSE; +} + + +/* + * Decompress gs->gs_filename if necessary + * Set gs->filename_unc to the name of the uncompressed file or NULL. + * Error reporting via signal 'interpreter_message' + * Return name of input file to use or NULL on error.. + */ +static gchar * +check_filecompressed(GtkGS * gs) +{ + FILE *file; + gchar buf[1024]; + gchar *filename, *filename_unc, *filename_err, *cmdline; + const gchar *cmd; + int fd; + + cmd = NULL; + + if((file = fopen(gs->gs_filename, "r")) + && (fread(buf, sizeof(gchar), 3, file) == 3)) { + if((buf[0] == '\037') && ((buf[1] == '\235') || (buf[1] == '\213'))) { + /* file is gzipped or compressed */ + cmd = gtk_gs_defaults_get_ungzip_cmd(); + } + else if(strncmp(buf, "BZh", 3) == 0) { + /* file is compressed with bzip2 */ + cmd = gtk_gs_defaults_get_unbzip2_cmd(); + } + } + if(NULL != file) + fclose(file); + + if(!cmd) + return gs->gs_filename; + + /* do the decompression */ + filename = ggv_quote_filename(gs->gs_filename); + filename_unc = g_strconcat(g_get_tmp_dir(), "/ggvXXXXXX", NULL); + if((fd = mkstemp(filename_unc)) < 0) { + g_free(filename_unc); + g_free(filename); + return NULL; + } + close(fd); + filename_err = g_strconcat(g_get_tmp_dir(), "/ggvXXXXXX", NULL); + if((fd = mkstemp(filename_err)) < 0) { + g_free(filename_err); + g_free(filename_unc); + g_free(filename); + return NULL; + } + close(fd); + cmdline = g_strdup_printf("%s %s >%s 2>%s", cmd, + filename, filename_unc, filename_err); + if((system(cmdline) == 0) + && ggv_file_readable(filename_unc) + && (ggv_file_length(filename_err) == 0)) { + /* sucessfully uncompressed file */ + gs->gs_filename_unc = filename_unc; + } + else { + /* report error */ + g_snprintf(buf, 1024, _("Error while decompressing file %s:\n"), + gs->gs_filename); + gtk_gs_emit_error_msg(gs, buf); + if(ggv_file_length(filename_err) > 0) { + FILE *err; + if((err = fopen(filename_err, "r"))) { + /* print file to message window */ + while(fgets(buf, 1024, err)) + gtk_gs_emit_error_msg(gs, buf); + fclose(err); + } + } + unlink(filename_unc); + g_free(filename_unc); + filename_unc = NULL; + } + unlink(filename_err); + g_free(filename_err); + g_free(cmdline); + g_free(filename); + return filename_unc; +} + +/* + * Check if gs->gs_filename or gs->gs_filename_unc is a pdf file and scan + * pdf file if necessary. + * Set gs->filename_dsc to the name of the dsc file or NULL. + * Error reporting via signal 'interpreter_message'. + */ +static gchar * +check_pdf(GtkGS * gs) +{ + FILE *file; + gchar buf[1024], *filename; + int fd; + + /* use uncompressed file as input if necessary */ + filename = (gs->gs_filename_unc ? gs->gs_filename_unc : gs->gs_filename); + + if((file = fopen(filename, "r")) + && (fread(buf, sizeof(char), 5, file) == 5) + && (strncmp(buf, "%PDF-", 5) == 0)) { + /* we found a PDF file */ + gchar *fname, *filename_dsc, *filename_err, *cmd, *cmdline; + filename_dsc = g_strconcat(g_get_tmp_dir(), "/ggvXXXXXX", NULL); + if((fd = mkstemp(filename_dsc)) < 0) { + return NULL; + } + close(fd); + filename_err = g_strconcat(g_get_tmp_dir(), "/ggvXXXXXX", NULL); + if((fd = mkstemp(filename_err)) < 0) { + g_free(filename_dsc); + return NULL; + } + close(fd); + fname = ggv_quote_filename(filename); + cmd = g_strdup_printf(gtk_gs_defaults_get_dsc_cmd(), filename_dsc, fname); + g_free(fname); + /* this command (sometimes?) prints error messages to stdout! */ + cmdline = g_strdup_printf("%s >%s 2>&1", cmd, filename_err); + g_free(cmd); + + if((system(cmdline) == 0) && ggv_file_readable(filename_dsc)) { + + /* success */ + filename = gs->gs_filename_dsc = filename_dsc; + + if(ggv_file_length(filename_err) > 0) { + gchar *err_msg = " "; + GtkWidget *dialog; + FILE *err; + GdkColor color; + + if((err = fopen(filename_err, "r"))) { + + /* print the content of the file to a message box */ + while(fgets(buf, 1024, err)) + err_msg = g_strconcat(err_msg, buf, NULL); + + /* FIXME The dialog is not yet set to modal, difficult to + * get the parent of the dialog box here + */ + + dialog = gtk_message_dialog_new(NULL, + GTK_DIALOG_MODAL, + GTK_MESSAGE_WARNING, + GTK_BUTTONS_OK, + ("There was an error while scaning the file: %s \n%s"), + gs->gs_filename, err_msg); + + gdk_color_parse("white", &color); + gtk_widget_modify_bg(GTK_WIDGET(dialog), GTK_STATE_NORMAL, &color); + + g_signal_connect(G_OBJECT(dialog), "response", + G_CALLBACK(gtk_widget_destroy), NULL); + + gtk_window_set_resizable(GTK_WINDOW(dialog), FALSE); + gtk_widget_show(dialog); + g_free(err_msg); + } + } + + } + else { + /* report error */ + g_snprintf(buf, 1024, + _("Error while converting pdf file %s:\n"), filename); + gtk_gs_emit_error_msg(gs, buf); + + if(ggv_file_length(filename_err) > 0) { + FILE *err; + if((err = fopen(filename_err, "r"))) { + /* print file to message window */ + while(fgets(buf, 1024, err)) + gtk_gs_emit_error_msg(gs, buf); + } + } + unlink(filename_dsc); + g_free(filename_dsc); + filename = NULL; + } + unlink(filename_err); + g_free(filename_err); + g_free(cmdline); + } + if(NULL != file) + fclose(file); + return filename; +} + +#ifdef BROKEN_XINERAMA_PATCH_THAT_SHOULD_NOT_BE_USED +/* never mind this patch: a properly working X server should take care of + calculating the proper values. */ +static float +compute_xdpi(void) +{ +# ifndef HAVE_XINERAMA + return 25.4 * gdk_screen_width() / gdk_screen_width_mm(); +# else + Display *dpy; + dpy = (Display *) GDK_DISPLAY(); + if(XineramaIsActive(dpy)) { + int num_heads; + XineramaScreenInfo *head_info; + head_info = (XineramaScreenInfo *) XineramaQueryScreens(dpy, &num_heads); + /* fake it with dimensions of the first head for now */ + return 25.4 * head_info[0].width / gdk_screen_width_mm(); + } + else { + return 25.4 * gdk_screen_width() / gdk_screen_width_mm(); + } +# endif + /* HAVE_XINERAMA */ +} + +static float +compute_ydpi(void) +{ +# ifndef HAVE_XINERAMA + return 25.4 * gdk_screen_height() / gdk_screen_height_mm(); +# else + Display *dpy; + dpy = (Display *) GDK_DISPLAY(); + if(XineramaIsActive(dpy)) { + int num_heads; + XineramaScreenInfo *head_info; + head_info = (XineramaScreenInfo *) XineramaQueryScreens(dpy, &num_heads); + /* fake it with dimensions of the first head for now */ + return 25.4 * head_info[0].height / gdk_screen_height_mm(); + } + else { + return 25.4 * gdk_screen_height() / gdk_screen_height_mm(); + } +# endif + /* HAVE_XINERAMA */ +} +#else +static float +compute_xdpi(void) +{ + return 25.4 * gdk_screen_width() / gdk_screen_width_mm(); +} + +static float +compute_ydpi(void) +{ + return 25.4 * gdk_screen_height() / gdk_screen_height_mm(); +} +#endif /* BROKEN_XINERAMA_PATCH_THAT_SHOULD_NOT_BE_USED */ + +/* Compute new size of window, sets xdpi and ydpi if necessary. + * returns True if new window size is different */ +static gboolean +compute_size(GtkGS * gs) +{ + guint new_width = 1; + guint new_height = 1; + gboolean change = FALSE; + gint orientation; + + /* width and height can be changed, calculate window size according */ + /* to xpdi and ydpi */ + orientation = gtk_gs_get_orientation(gs); + + switch (orientation) { + case GTK_GS_ORIENTATION_PORTRAIT: + case GTK_GS_ORIENTATION_UPSIDEDOWN: + new_width = (gs->urx - gs->llx) / 72.0 * gs->xdpi + 0.5; + new_height = (gs->ury - gs->lly) / 72.0 * gs->ydpi + 0.5; + break; + case GTK_GS_ORIENTATION_LANDSCAPE: + case GTK_GS_ORIENTATION_SEASCAPE: + new_width = (gs->ury - gs->lly) / 72.0 * gs->xdpi + 0.5; + new_height = (gs->urx - gs->llx) / 72.0 * gs->ydpi + 0.5; + break; + } + + change = (new_width != gs->width * gs->zoom_factor) + || (new_height != gs->height * gs->zoom_factor); + gs->width = (gint) (new_width * gs->zoom_factor); + gs->height = (gint) (new_height * gs->zoom_factor); + if(GTK_WIDGET_REALIZED(gs)) { + if(!gs->loaded) { + if(gdk_window_is_visible(gs->pstarget)) + gdk_window_hide(gs->pstarget); + } + else { + if(!gdk_window_is_visible(gs->pstarget) && gs->width > 0 + && gs->height > 0) + gdk_window_show(gs->pstarget); + } + gtk_gs_munge_adjustments(gs); + } + + return (change); +} + +gint +gtk_gs_enable_interpreter(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + if(!gs->gs_filename) + return 0; + + gs->disable_start = FALSE; + if(GTK_WIDGET_REALIZED(gs)) { + return start_interpreter(gs); + } + else { + return 0; + } +} + +/* publicly accessible functions */ + +GType +gtk_gs_get_type(void) +{ + static GType gs_type = 0; + if(!gs_type) { + GTypeInfo gs_info = { + sizeof(GtkGSClass), + (GBaseInitFunc) NULL, + (GBaseFinalizeFunc) NULL, + (GClassInitFunc) gtk_gs_class_init, + (GClassFinalizeFunc) NULL, + NULL, /* class_data */ + sizeof(GtkGS), + 0, /* n_preallocs */ + (GInstanceInitFunc) gtk_gs_init + }; + + gs_type = g_type_register_static(gtk_widget_get_type(), + "GtkGS", &gs_info, 0); + } + return gs_type; + + +} + +GtkWidget * +gtk_gs_new(GtkAdjustment * hadj, GtkAdjustment * vadj) +{ + GtkGS *gs; + + if(NULL == hadj) + hadj = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 1.0, 0.01, 0.1, 0.09)); + if(NULL == vadj) + vadj = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 1.0, 0.01, 0.1, 0.09)); + + gs = (GtkGS *) gtk_type_new(gtk_gs_get_type()); + + gtk_gs_set_adjustments(gs, hadj, vadj); + + return GTK_WIDGET(gs); +} + + +GtkWidget * +gtk_gs_new_from_file(GtkAdjustment * hadj, GtkAdjustment * vadj, char *fname) +{ + GtkWidget *gs = gtk_gs_new(hadj, vadj); + gtk_gs_load(GTK_GS(gs), fname); + return gs; +} + +void +gtk_gs_reload(GtkGS * gs) +{ + gchar *fname; + gfloat hval = gs->hadj->value; + gfloat vval = gs->vadj->value; + gint page; + + if(!gs->gs_filename) + return; + + page = gtk_gs_get_current_page(gs); + fname = g_strdup(gs->gs_filename); + gtk_gs_load(gs, fname); + gtk_gs_goto_page(gs, page); + gtk_adjustment_set_value(gs->hadj, hval); + gtk_adjustment_set_value(gs->vadj, vval); + g_free(fname); +} + + +/* + * Show error message -> send signal "interpreter_message" + */ +static void +gtk_gs_emit_error_msg(GtkGS * gs, const gchar * msg) +{ + gtk_signal_emit(GTK_OBJECT(gs), + gtk_gs_signals[INTERPRETER_MESSAGE], g_strdup(msg)); +} + + +void +gtk_gs_center_page(GtkGS * gs) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + gdk_window_move(gs->pstarget, + (gs->widget.allocation.width - gs->width) / 2, + (gs->widget.allocation.height - gs->height) / 2); + gs->hadj->page_size = ((gfloat) gs->widget.allocation.width) / gs->width; + gs->hadj->page_size = MIN(gs->hadj->page_size, 1.0); + gs->vadj->page_size = ((gfloat) gs->widget.allocation.height) / gs->height; + gs->vadj->page_size = MIN(gs->vadj->page_size, 1.0); + gs->hadj->value = 0.5 - gs->hadj->page_size / 2; + gs->vadj->value = 0.5 - gs->vadj->page_size / 2; + gtk_adjustment_changed(gs->hadj); + gtk_adjustment_changed(gs->vadj); +} + +void +gtk_gs_scroll(GtkGS * gs, gint x_delta, gint y_delta) +{ + gfloat hval, vval; + + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + hval = gs->hadj->value + ((gfloat) x_delta) / gs->width; + vval = gs->vadj->value + ((gfloat) y_delta) / gs->height; + if(hval <= gs->hadj->upper - gs->hadj->page_size && hval >= gs->hadj->lower) + gtk_adjustment_set_value(gs->hadj, hval); + if(vval <= gs->vadj->upper - gs->vadj->page_size && vval >= gs->vadj->lower) + gtk_adjustment_set_value(gs->vadj, vval); +} + +void +gtk_gs_disable_interpreter(GtkGS * gs) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + gs->disable_start = TRUE; + if(GTK_WIDGET_REALIZED(GTK_WIDGET(gs))) + stop_interpreter(gs); +} + +gboolean +gtk_gs_load(GtkGS * gs, const gchar * fname) +{ + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + /* clean up previous document */ + gtk_gs_cleanup(gs); + + if(fname == NULL) { + if(gs->pstarget != NULL && gdk_window_is_visible(gs->pstarget)) + gdk_window_hide(gs->pstarget); + gs->gs_status = ""; + return FALSE; + } + + /* prepare this document */ + + /* default values: no dsc information available */ + gs->structured_doc = FALSE; + gs->send_filename_to_gs = TRUE; + gs->current_page = -2; + gs->loaded = FALSE; + if(*fname == '/') { + /* an absolute path */ + gs->gs_filename = g_strdup(fname); + } + else { + /* path relative to our cwd: make it absolute */ + gchar *cwd = g_get_current_dir(); + gs->gs_filename = g_strconcat(cwd, "/", fname, NULL); + g_free(cwd); + } + + if((gs->reading_from_pipe = (strcmp(fname, "-") == 0))) { + gs->send_filename_to_gs = FALSE; + } + else { + /* + * We need to make sure that the file is loadable/exists! + * otherwise we want to exit without loading new stuff... + */ + gchar *filename = NULL; + + if(!ggv_file_readable(fname)) { + gchar buf[1024]; + g_snprintf(buf, 1024, _("Cannot open file %s.\n"), fname); + gtk_gs_emit_error_msg(gs, buf); + gs->gs_status = _("File is not readable."); + } + else { + filename = check_filecompressed(gs); + if(filename) + filename = check_pdf(gs); + } + + if(!filename || (gs->gs_psfile = fopen(filename, "r")) == NULL) { + gtk_gs_cleanup(gs); + return FALSE; + } + + /* we grab the vital statistics!!! */ + gs->doc = psscan(gs->gs_psfile, gs->respect_eof, filename); + + if(gs->doc == NULL) { + /* File does not seem to be a Postscript one */ + gchar buf[1024]; + g_snprintf(buf, 1024, _("Error while scanning file %s\n"), fname); + gtk_gs_emit_error_msg(gs, buf); + gtk_gs_cleanup(gs); + gs->gs_status = _("The file is not a PostScript document."); + return FALSE; + } + + if((!gs->doc->epsf && gs->doc->numpages > 0) || + (gs->doc->epsf && gs->doc->numpages > 1)) { + gs->structured_doc = TRUE; + gs->send_filename_to_gs = FALSE; + } + + /* We have to set up the orientation of the document */ + + + /* orientation can only be portrait, and landscape or none. + This is the document default. A document can have + pages in landscape and some in portrait */ + if(gs->override_orientation) { + /* If the orientation should be override... + then gs->orientation has already the correct + value (it was set when the widget was created */ + /* So do nothing */ + + } + else { + /* Otherwise, set the proper orientation for the doc */ + gs->real_orientation = gs->doc->orientation; + } + } + gtk_gs_set_page_size(gs, -1, gs->current_page); + gtk_widget_queue_resize(&(gs->widget)); + gs->loaded = TRUE; + + gs->gs_status = _("Document loaded."); + + return gs->loaded; +} + + +gboolean +gtk_gs_next_page(GtkGS * gs) +{ + XEvent event; + + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + if(gs->interpreter_pid == 0) { /* no interpreter active */ + return FALSE; + } + + if(gs->busy) { /* interpreter is busy */ + return FALSE; + } + + gs->busy = TRUE; + + event.xclient.type = ClientMessage; + event.xclient.display = gdk_display; + event.xclient.window = gs->message_window; + event.xclient.message_type = gdk_x11_atom_to_xatom(gs_class->next_atom); + event.xclient.format = 32; + + gdk_error_trap_push(); + XSendEvent(gdk_display, gs->message_window, FALSE, 0, &event); + gdk_flush(); + gdk_error_trap_pop(); + + return TRUE; +} + +gint +gtk_gs_get_current_page(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, -1); + g_return_val_if_fail(GTK_IS_GS(gs), -1); + + return gs->current_page; +} + +gint +gtk_gs_get_page_count(GtkGS * gs) +{ + if(!gs->gs_filename) + return 0; + + if(gs->doc) { + if(gs->structured_doc) + return gs->doc->numpages; + else + return G_MAXINT; + } + else + return 0; +} + +gboolean +gtk_gs_goto_page(GtkGS * gs, gint page) +{ + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + if(!gs->gs_filename) { + return FALSE; + } + + /* range checking... */ + if(page < 0) + page = 0; + + if(gs->structured_doc && gs->doc) { + if(page >= gs->doc->numpages) + page = gs->doc->numpages - 1; + + if(page == gs->current_page && !gs->changed) + return TRUE; + + gs->current_page = page; + + if(!GTK_WIDGET_REALIZED(gs)) + return FALSE; + + if(gs->doc->pages[page].orientation != NONE && + !gs->override_orientation && + gs->doc->pages[page].orientation != gs->real_orientation) { + gs->real_orientation = gs->doc->pages[page].orientation; + gs->changed = TRUE; + } + + gtk_gs_set_page_size(gs, -1, page); + + gs->changed = FALSE; + + if(is_interpreter_ready(gs)) { + gtk_gs_next_page(gs); + } + else { + gtk_gs_enable_interpreter(gs); + send_ps(gs, gs->doc->beginprolog, gs->doc->lenprolog, FALSE); + send_ps(gs, gs->doc->beginsetup, gs->doc->lensetup, FALSE); + } + + send_ps(gs, gs->doc->pages[gs->current_page].begin, + gs->doc->pages[gs->current_page].len, FALSE); + } + else { + /* Unstructured document */ + /* In the case of non structured documents, + GS read the PS from the actual file (via command + line. Hence, ggv only send a signal next page. + If ghostview is not running it is usually because + the last page of the file was displayed. In that + case, ggv restarts GS again and the first page is displayed. + */ + if(page == gs->current_page && !gs->changed) + return TRUE; + + if(!GTK_WIDGET_REALIZED(gs)) + return FALSE; + + if(!is_interpreter_ready(gs)) + gtk_gs_enable_interpreter(gs); + + gs->current_page = page; + + gtk_gs_next_page(gs); + } + return TRUE; +} + +/* + * set pagesize sets the size from + * if new_pagesize is -1, then it is set to either + * a) the default settings of pageid, if they exist, or if pageid != -1. + * b) the default setting of the document, if it exists. + * c) the default setting of the widget. + * otherwise, the new_pagesize is used as the pagesize + */ +gboolean +gtk_gs_set_page_size(GtkGS * gs, gint new_pagesize, gint pageid) +{ + gint new_llx = 0; + gint new_lly = 0; + gint new_urx = 0; + gint new_ury = 0; + GtkGSPaperSize *papersizes = gtk_gs_defaults_get_paper_sizes(); + + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + if(new_pagesize == -1) { + if(gs->default_size > 0) + new_pagesize = gs->default_size; + if(!gs->override_size && gs->doc) { + /* If we have a document: + We use -- the page size (if specified) + or the doc. size (if specified) + or the page bbox (if specified) + or the bounding box + */ + if((pageid >= 0) && (gs->doc->numpages > pageid) && + (gs->doc->pages) && (gs->doc->pages[pageid].size)) { + new_pagesize = gs->doc->pages[pageid].size - gs->doc->size; + } + else if(gs->doc->default_page_size != NULL) { + new_pagesize = gs->doc->default_page_size - gs->doc->size; + } + else if((pageid >= 0) && + (gs->doc->numpages > pageid) && + (gs->doc->pages) && + (gs->doc->pages[pageid].boundingbox[URX] > + gs->doc->pages[pageid].boundingbox[LLX]) && + (gs->doc->pages[pageid].boundingbox[URY] > + gs->doc->pages[pageid].boundingbox[LLY])) { + new_pagesize = -1; + } + else if((gs->doc->boundingbox[URX] > gs->doc->boundingbox[LLX]) && + (gs->doc->boundingbox[URY] > gs->doc->boundingbox[LLY])) { + new_pagesize = -1; + } + } + } + + /* Compute bounding box */ + if(gs->doc && ((gs->doc->epsf && !gs->override_size) || new_pagesize == -1)) { /* epsf or bbox */ + if((pageid >= 0) && + (gs->doc->pages) && + (gs->doc->pages[pageid].boundingbox[URX] > + gs->doc->pages[pageid].boundingbox[LLX]) + && (gs->doc->pages[pageid].boundingbox[URY] > + gs->doc->pages[pageid].boundingbox[LLY])) { + /* use page bbox */ + new_llx = gs->doc->pages[pageid].boundingbox[LLX]; + new_lly = gs->doc->pages[pageid].boundingbox[LLY]; + new_urx = gs->doc->pages[pageid].boundingbox[URX]; + new_ury = gs->doc->pages[pageid].boundingbox[URY]; + } + else if((gs->doc->boundingbox[URX] > gs->doc->boundingbox[LLX]) && + (gs->doc->boundingbox[URY] > gs->doc->boundingbox[LLY])) { + /* use doc bbox */ + new_llx = gs->doc->boundingbox[LLX]; + new_lly = gs->doc->boundingbox[LLY]; + new_urx = gs->doc->boundingbox[URX]; + new_ury = gs->doc->boundingbox[URY]; + } + } + else { + if(new_pagesize < 0) + new_pagesize = gs->default_size; + new_llx = new_lly = 0; + if(gs->doc && !gs->override_size && gs->doc->size && + (new_pagesize < gs->doc->numsizes)) { + new_urx = gs->doc->size[new_pagesize].width; + new_ury = gs->doc->size[new_pagesize].height; + } + else { + new_urx = papersizes[new_pagesize].width; + new_ury = papersizes[new_pagesize].height; + } + } + + if(new_urx <= new_llx) + new_urx = papersizes[12].width; + if(new_ury <= new_lly) + new_ury = papersizes[12].height; + + /* If bounding box changed, setup for new size. */ + /* gtk_gs_disable_interpreter (gs); */ + if((new_llx != gs->llx) || (new_lly != gs->lly) || + (new_urx != gs->urx) || (new_ury != gs->ury)) { + gs->llx = new_llx; + gs->lly = new_lly; + gs->urx = new_urx; + gs->ury = new_ury; + gs->changed = TRUE; + } + + if(gs->changed) { + if(GTK_WIDGET_REALIZED(gs)) { + set_up_page(gs); + gtk_widget_queue_resize(&(gs->widget)); + } + return TRUE; + } + + return FALSE; +} + +void +gtk_gs_set_override_orientation(GtkGS * gs, gboolean bNewOverride) +{ + gint iOldOrientation; + + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + iOldOrientation = gtk_gs_get_orientation(gs); + + gs->override_orientation = bNewOverride; + + /* If the current orientation is different from the + new orientation then redisplay */ + if(iOldOrientation != gtk_gs_get_orientation(gs)) { + gs->changed = TRUE; + if(GTK_WIDGET_REALIZED(gs)) + set_up_page(gs); + } + gtk_widget_queue_resize(&(gs->widget)); +} + +gboolean +gtk_gs_get_override_orientation(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + return gs->override_orientation; +} + +void +gtk_gs_set_override_size(GtkGS * gs, gboolean f) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + if(f != gs->override_size) { + gs->override_size = f; + gs->changed = TRUE; + gtk_gs_set_page_size(gs, -1, gs->current_page); + if(GTK_WIDGET_REALIZED(gs)) + set_up_page(gs); + } + gtk_widget_queue_resize(&(gs->widget)); +} + +gboolean +gtk_gs_get_override_size(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + return gs->override_size; +} + +void +gtk_gs_set_zoom(GtkGS * gs, gfloat zoom) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + switch (gs->zoom_mode) { + case GTK_GS_ZOOM_FIT_WIDTH: + zoom = gtk_gs_zoom_to_fit(gs, TRUE); + break; + case GTK_GS_ZOOM_FIT_PAGE: + zoom = gtk_gs_zoom_to_fit(gs, FALSE); + break; + case GTK_GS_ZOOM_ABSOLUTE: + default: + break; + } + if(zoom < ggv_zoom_levels[0]) + zoom = ggv_zoom_levels[0]; + else if(zoom > ggv_zoom_levels[ggv_max_zoom_levels]) + zoom = ggv_zoom_levels[ggv_max_zoom_levels]; + if(fabs(gs->zoom_factor - zoom) > 0.001) { + gs->zoom_factor = zoom; + if(GTK_WIDGET_REALIZED(gs)) + set_up_page(gs); + gs->changed = TRUE; + gtk_widget_queue_resize(&(gs->widget)); + } +} + +gfloat +gtk_gs_get_zoom(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, 0.0); + g_return_val_if_fail(GTK_IS_GS(gs), 0.0); + + return gs->zoom_factor; +} + +gfloat +gtk_gs_zoom_to_fit(GtkGS * gs, gboolean fit_width) +{ + gint new_y; + gfloat new_zoom; + guint avail_w, avail_h; + + g_return_val_if_fail(gs != NULL, 0.0); + g_return_val_if_fail(GTK_IS_GS(gs), 0.0); + + avail_w = (gs->avail_w > 0) ? gs->avail_w : gs->width; + avail_h = (gs->avail_h > 0) ? gs->avail_h : gs->height; + + new_zoom = ((gfloat) avail_w) / ((gfloat) gs->width) * gs->zoom_factor; + if(!fit_width) { + new_y = new_zoom * ((gfloat) gs->height) / gs->zoom_factor; + if(new_y > avail_h) + new_zoom = ((gfloat) avail_h) / ((gfloat) gs->height) * gs->zoom_factor; + } + + return new_zoom; +} + +gboolean +gtk_gs_set_default_orientation(GtkGS * gs, gint orientation) +{ + gint iOldOrientation; + + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + g_return_val_if_fail((orientation == GTK_GS_ORIENTATION_PORTRAIT) || + (orientation == GTK_GS_ORIENTATION_LANDSCAPE) || + (orientation == GTK_GS_ORIENTATION_UPSIDEDOWN) || + (orientation == GTK_GS_ORIENTATION_SEASCAPE), FALSE); + + iOldOrientation = gtk_gs_get_orientation(gs); + gs->fallback_orientation = orientation; + + /* We are setting the fallback orientation */ + if(iOldOrientation != gtk_gs_get_orientation(gs)) { + gs->changed = TRUE; + if(GTK_WIDGET_REALIZED(gs)) + set_up_page(gs); + gtk_widget_queue_resize(&(gs->widget)); + return TRUE; + } + + return FALSE; +} + +gint +gtk_gs_get_default_orientation(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, -1); + g_return_val_if_fail(GTK_IS_GS(gs), -1); + + return gs->fallback_orientation; +} + +gint +gtk_gs_get_orientation(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, -1); + g_return_val_if_fail(GTK_IS_GS(gs), -1); + + if(gs->doc) { + if(gs->structured_doc) { + if(gs->doc->pages[MAX(gs->current_page, 0)].orientation != + GTK_GS_ORIENTATION_NONE) + gs->real_orientation = + gs->doc->pages[MAX(gs->current_page, 0)].orientation; + else + gs->real_orientation = gs->doc->default_page_orientation; + } + + if(gs->real_orientation == GTK_GS_ORIENTATION_NONE) + gs->real_orientation = gs->doc->orientation; + } + + if(gs->override_orientation || + gs->real_orientation == GTK_GS_ORIENTATION_NONE) + return gs->fallback_orientation; + else + return gs->real_orientation; +} + +void +gtk_gs_set_default_size(GtkGS * gs, gint size) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + gs->default_size = size; + gtk_gs_set_page_size(gs, -1, gs->current_page); +} + +gint +gtk_gs_get_default_size(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, -1); + g_return_val_if_fail(GTK_IS_GS(gs), -1); + + return gs->default_size; +} + +void +gtk_gs_set_respect_eof(GtkGS * gs, gboolean f) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + if(gs->respect_eof == f) + return; + + gs->respect_eof = f; + gtk_gs_set_page_size(gs, -1, gs->current_page); +} + +gint +gtk_gs_get_respect_eof(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, -1); + g_return_val_if_fail(GTK_IS_GS(gs), -1); + + return gs->respect_eof; +} + +void +gtk_gs_set_antialiasing(GtkGS * gs, gboolean f) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + + if(gs->antialiased == f) + return; + + gs->antialiased = f; + gs->changed = TRUE; + if(GTK_WIDGET_REALIZED(gs)) + start_interpreter(gs); + gtk_gs_goto_page(gs, gs->current_page); +} + +gint +gtk_gs_get_antialiasing(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, -1); + g_return_val_if_fail(GTK_IS_GS(gs), -1); + + return gs->antialiased; +} + +const gchar * +gtk_gs_get_document_title(GtkGS * gs) +{ + g_return_val_if_fail(gs != NULL, NULL); + g_return_val_if_fail(GTK_IS_GS(gs), NULL); + + if(gs->doc && gs->doc->title) + return gs->doc->title; + + return NULL; +} + +guint +gtk_gs_get_document_numpages(GtkGS * widget) +{ + g_return_val_if_fail(widget != NULL, 0); + g_return_val_if_fail(GTK_IS_GS(widget), 0); + + if(widget->doc) + return widget->doc->numpages; + + return 0; +} + +const gchar * +gtk_gs_get_document_page_label(GtkGS * widget, int page) +{ + g_return_val_if_fail(widget != NULL, NULL); + g_return_val_if_fail(GTK_IS_GS(widget), NULL); + + if(widget->doc && widget->doc->pages && (widget->doc->numpages >= page)) + return widget->doc->pages[page - 1].label; + + return NULL; +} + +gint +gtk_gs_get_size_index(const gchar * string, GtkGSPaperSize * size) +{ + guint idx = 0; + + while(size[idx].name != NULL) { + if(strcmp(size[idx].name, string) == 0) + return idx; + idx++; + } + + return -1; +} + +void +gtk_gs_start_scroll(GtkGS * gs) +{ + gint x, y, w, h; + + if(!GTK_WIDGET_REALIZED(gs) || !gs->show_scroll_rect) + return; + + gdk_window_get_geometry(gs->pstarget, &x, &y, &w, &h, NULL); + gs->scroll_start_x = MAX(-x, 0); + gs->scroll_start_y = MAX(-y, 0); + gs->scroll_width = MIN(gs->widget.allocation.width - 1, w - 1); + gs->scroll_height = MIN(gs->widget.allocation.height - 1, h - 1); + + if(gs->bpixmap) { + GdkRectangle rect; + rect.x = gs->scroll_start_x; + rect.y = gs->scroll_start_y; + rect.width = gs->scroll_width + 1; + rect.height = gs->scroll_height + 1; + gdk_draw_rectangle(gs->bpixmap, gs->psgc, FALSE, + gs->scroll_start_x, gs->scroll_start_y, + gs->scroll_width, gs->scroll_height); + rect.width = 1; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + rect.x = gs->scroll_start_x + gs->scroll_width; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + rect.x = gs->scroll_start_x + 1; + rect.width = gs->scroll_start_x + gs->scroll_width - 1; + rect.height = 1; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + rect.y = gs->scroll_start_y + gs->scroll_height; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + } +} + +void +gtk_gs_end_scroll(GtkGS * gs) +{ + if(!GTK_WIDGET_REALIZED(gs) || !gs->show_scroll_rect) + return; + + if(gs->scroll_start_x == -1 || gs->scroll_start_y == -1) + return; + + if(gs->bpixmap) { + GdkRectangle rect; + rect.x = gs->scroll_start_x; + rect.y = gs->scroll_start_y; + rect.width = gs->scroll_width + 1; + rect.height = gs->scroll_height + 1; + gdk_draw_rectangle(gs->bpixmap, gs->psgc, FALSE, + gs->scroll_start_x, gs->scroll_start_y, + gs->scroll_width, gs->scroll_height); + rect.width = 1; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + rect.x = gs->scroll_start_x + gs->scroll_width; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + rect.x = gs->scroll_start_x + 1; + rect.width = gs->scroll_start_x + gs->scroll_width - 1; + rect.height = 1; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + rect.y = gs->scroll_start_y + gs->scroll_height; + gdk_window_invalidate_rect(gs->pstarget, &rect, TRUE); + } + gs->scroll_start_x = -1; + gs->scroll_start_y = -1; +} + +void +gtk_gs_set_show_scroll_rect(GtkGS * gs, gboolean f) +{ + gs->show_scroll_rect = f; +} + +gboolean +gtk_gs_get_show_scroll_rect(GtkGS * gs) +{ + return gs->show_scroll_rect; +} + +gboolean +gtk_gs_scroll_to_edge(GtkGS * gs, GtkPositionType vertical, + GtkPositionType horizontal) +{ + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + + switch (vertical) { + case GTK_POS_TOP: + gs->vadj->value = gs->vadj->lower; + gtk_adjustment_value_changed(gs->vadj); + break; + case GTK_POS_BOTTOM: + gs->vadj->value = gs->vadj->upper - gs->vadj->page_size; + gtk_adjustment_value_changed(gs->vadj); + break; + default: + g_assert(0); /* Illegal parameter error */ + } + + + switch (horizontal) { + case GTK_POS_TOP: + gs->hadj->value = gs->hadj->lower; + gtk_adjustment_value_changed(gs->hadj); + break; + case GTK_POS_BOTTOM: + gs->hadj->value = gs->hadj->upper - gs->hadj->page_size; + gtk_adjustment_value_changed(gs->hadj); + break; + default: + g_assert(0); /* Illegal parameter error */ + } + + return TRUE; +} + +gboolean +gtk_gs_scroll_step(GtkGS * gs, GtkScrollType direction, gboolean dowrap) +{ + GtkAdjustment *MainAdj; /* We will move this adjustment */ + GtkAdjustment *SecoAdj; /* And this _only_ if we can't move MainAdj (ie. we're edge) + and there is wrapping */ + + gboolean MoveHorizontal = TRUE; /* Positive if we move horizontal */ + gboolean DirectionFlag = TRUE; /* Positive if we move towards upper */ + g_return_val_if_fail(gs != NULL, FALSE); + g_return_val_if_fail(GTK_IS_GS(gs), FALSE); + +#define EPSILON 0.00005 + +#define CHECK_THERE_IS_NO_LOWER_SPACE(adj) \ + ((adj)->value - (EPSILON) <= (adj)->lower) +#define CHECK_THERE_IS_NO_UPPER_SPACE(adj) \ + ((adj)->value + (EPSILON) >= (adj)->upper - (adj)->page_size) + +#define CHECK_THERE_IS_NO_SPACE_FOR_STEP(adj,dir) \ + (dir?CHECK_THERE_IS_NO_UPPER_SPACE(adj):CHECK_THERE_IS_NO_LOWER_SPACE(adj)) + + /* To make code more readable, we make a macro */ +#define ADVANCE_TOWARDS_LOWER(adj) \ + (adj->value -= gs->scroll_step * (adj->page_size)) +#define ADVANCE_TOWARDS_UPPER(adj) \ + (adj->value += gs->scroll_step * (adj->page_size)) + +#define ADVANCE_STEP(adj,dir) \ + (dir?ADVANCE_TOWARDS_UPPER(adj):ADVANCE_TOWARDS_LOWER(adj)) + +#define MOVE_TO_LOWER_EDGE(adj) \ + (adj->value = adj->lower) +#define MOVE_TO_UPPER_EDGE(adj) \ + (adj->value = adj->upper - adj->page_size) + + /* if upper is 1 goto upper, otherwise to lower */ +#define MOVE_TO_EDGE(adj,upper) (upper?MOVE_TO_UPPER_EDGE(adj):MOVE_TO_LOWER_EDGE(adj)) + + /* These variables make our life easier */ + switch (direction) { + case GTK_SCROLL_STEP_RIGHT: + MoveHorizontal = TRUE; + DirectionFlag = TRUE; + break; + case GTK_SCROLL_STEP_LEFT: + MoveHorizontal = TRUE; + DirectionFlag = FALSE; + break; + case GTK_SCROLL_STEP_DOWN: + MoveHorizontal = FALSE; + DirectionFlag = TRUE; + break; + case GTK_SCROLL_STEP_UP: + MoveHorizontal = FALSE; + DirectionFlag = FALSE; + break; + default: + g_warning("Illegal scroll step direction."); + } + + if(MoveHorizontal) { + MainAdj = gs->hadj; + SecoAdj = gs->vadj; + } + else { + MainAdj = gs->vadj; + SecoAdj = gs->hadj; + } + + if(CHECK_THERE_IS_NO_SPACE_FOR_STEP(MainAdj, DirectionFlag)) { + if(!dowrap) + return FALSE; + /* Move in the oposite axis */ + if(CHECK_THERE_IS_NO_SPACE_FOR_STEP(SecoAdj, DirectionFlag)) { + /* there is no place to move, we need a new page */ + return FALSE; + } + ADVANCE_STEP(SecoAdj, DirectionFlag); + + if(CHECK_THERE_IS_NO_SPACE_FOR_STEP(SecoAdj, DirectionFlag)) { + /* We move it too far, lets move it to the edge */ + MOVE_TO_EDGE(SecoAdj, DirectionFlag); + } + /* now move to edge (other axis) in oposite direction */ + MOVE_TO_EDGE(MainAdj, !DirectionFlag); + gtk_adjustment_value_changed(SecoAdj); + return TRUE; + } + + /* Now we know we can move in the direction sought */ + ADVANCE_STEP(MainAdj, DirectionFlag); + + if(CHECK_THERE_IS_NO_SPACE_FOR_STEP(MainAdj, DirectionFlag)) { + /* We move it too far, lets move it to the edge */ + MOVE_TO_EDGE(MainAdj, DirectionFlag); + } + gtk_adjustment_value_changed(MainAdj); + + return TRUE; +} + +gchar * +gtk_gs_get_postscript(GtkGS * gs, gint * pages) +{ + GtkGSDocSink *sink; + gchar *doc; + gboolean free_pages = FALSE; + + if(pages == NULL) { + if(!gs->structured_doc) { + FILE *f; + struct stat sb; + + if(stat(GTK_GS_GET_PS_FILE(gs), &sb)) + return NULL; + doc = g_new(gchar, sb.st_size); + if(!doc) + return NULL; + f = fopen(GTK_GS_GET_PS_FILE(gs), "r"); + if(NULL != f && fread(doc, sb.st_size, 1, f) != 1) { + g_free(doc); + doc = NULL; + } + if(NULL != f) + fclose(f); + return doc; + } + else { + int i, n = gtk_gs_get_page_count(gs); + pages = g_new0(gint, n); + for(i = 0; i < n; i++) + pages[i] = TRUE; + free_pages = TRUE; + } + } + + sink = gtk_gs_doc_sink_new(); + + if(GTK_GS_IS_PDF(gs)) { + gchar *tmpn = g_strconcat(g_get_tmp_dir(), "/ggvXXXXXX", NULL); + gchar *cmd, *fname; + int tmpfd; + + if((tmpfd = mkstemp(tmpn)) < 0) { + g_free(tmpn); + return NULL; + } + close(tmpfd); + fname = ggv_quote_filename(gs->gs_filename_unc ? + gs->gs_filename_unc : gs->gs_filename); + cmd = g_strdup_printf(gtk_gs_defaults_get_convert_pdf_cmd(), tmpn, fname); + g_free(fname); + if((system(cmd) == 0) && ggv_file_readable(tmpn)) { + GtkWidget *tmp_gs; + tmp_gs = gtk_gs_new_from_file(NULL, NULL, tmpn); + if(NULL != tmp_gs) { + if(GTK_GS(tmp_gs)->loaded) + pscopydoc(sink, tmpn, GTK_GS(tmp_gs)->doc, pages); + gtk_widget_destroy(tmp_gs); + } + } + g_free(cmd); + g_free(tmpn); + } + else { + /* Use uncompressed file if necessary */ + pscopydoc(sink, GTK_GS_GET_PS_FILE(gs), gs->doc, pages); + } + if(free_pages) + g_free(pages); + doc = gtk_gs_doc_sink_get_buffer(sink); + gtk_gs_doc_sink_free(sink); + return doc; +} + +void +gtk_gs_set_adjustments(GtkGS * gs, GtkAdjustment * hadj, GtkAdjustment * vadj) +{ + g_return_if_fail(gs != NULL); + g_return_if_fail(GTK_IS_GS(gs)); + if(hadj) + g_return_if_fail(GTK_IS_ADJUSTMENT(hadj)); + else + hadj = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 1.0, 0.0, 0.0, 1.0)); + if(vadj) + g_return_if_fail(GTK_IS_ADJUSTMENT(vadj)); + else + vadj = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 1.0, 0.0, 0.0, 1.0)); + + if(gs->hadj && (gs->hadj != hadj)) { + g_signal_handlers_disconnect_matched(G_OBJECT(gs->hadj), + G_SIGNAL_MATCH_DATA, + 0, 0, NULL, NULL, gs); + gtk_object_unref(GTK_OBJECT(gs->hadj)); + } + if(gs->vadj && (gs->vadj != vadj)) { + g_signal_handlers_disconnect_matched(G_OBJECT(gs->vadj), + G_SIGNAL_MATCH_DATA, + 0, 0, NULL, NULL, gs); + gtk_object_unref(GTK_OBJECT(gs->vadj)); + } + if(gs->hadj != hadj) { + hadj->lower = 0.0; + hadj->upper = 1.0; + hadj->value = 0.0; + hadj->page_size = 1.0; + hadj->page_increment = 1.0; + gs->hadj = hadj; + gtk_object_ref(GTK_OBJECT(gs->hadj)); + gtk_object_sink(GTK_OBJECT(gs->hadj)); + + g_signal_connect(G_OBJECT(hadj), "value_changed", + G_CALLBACK(gtk_gs_value_adjustment_changed), + (gpointer) gs); + } + if(gs->vadj != vadj) { + vadj->lower = 0.0; + vadj->upper = 1.0; + vadj->value = 0.0; + vadj->page_size = 1.0; + vadj->page_increment = 1.0; + gs->vadj = vadj; + gtk_object_ref(GTK_OBJECT(gs->vadj)); + gtk_object_sink(GTK_OBJECT(gs->vadj)); + + g_signal_connect(G_OBJECT(vadj), "value_changed", + G_CALLBACK(gtk_gs_value_adjustment_changed), + (gpointer) gs); + } + if(GTK_WIDGET_REALIZED(gs)) + gtk_gs_munge_adjustments(gs); +} + + +void +gtk_gs_set_scroll_step(GtkGS * gs, gfloat scroll_step) +{ + gs->scroll_step = scroll_step; +} + +gfloat +gtk_gs_get_scroll_step(GtkGS * gs) +{ + return gs->scroll_step; +} + +void +gtk_gs_set_zoom_mode(GtkGS * gs, GtkGSZoomMode zoom_mode) +{ + if(zoom_mode != gs->zoom_mode) { + gs->zoom_mode = zoom_mode; + gtk_gs_set_zoom(gs, 1.0); + } +} + +GtkGSZoomMode +gtk_gs_get_zoom_mode(GtkGS * gs) +{ + return gs->zoom_mode; +} + +void +gtk_gs_set_available_size(GtkGS * gs, guint avail_w, guint avail_h) +{ + gs->avail_w = avail_w; + gs->avail_h = avail_h; + if(gs->zoom_mode != GTK_GS_ZOOM_ABSOLUTE) { + gtk_gs_set_zoom(gs, 0.0); + } +} |