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gtk2/gtk/gtktext.c
Owen Taylor ab30a02e5f - Show selection correctly when starting selection with arrows 
Sun Mar  8 15:53:33 1998  Owen Taylor  <owt1@cornell.edu>

	* gtk/gtktext.c:

	- Show selection correctly when starting selection with arrows

	- Display pixmap background only when not editable

	- Redraw focus area more carefully to prevent flashing (and
	  make style of drawing consistent with Entry)

	* gtk/gtktreeitem.c: ref colormaps for pixmap by colormap
	  storage.

	* gtk/gtkrc.c: Store a separate style for each RcStyle for
	  each colormap, so we can handle background pixmaps
	  correctly, which need to be per-colormap. (Leaks
	  colormaps...)

	  Parse text color style entries correctly.

	* gtk/testgtk.c: insert text without fg color
	  gtk/testgtkrc: move "*" after rest, so the other class styles
	                 take effect

        * gdk/gdkwindow.c gdk/gdk.c gdk/gdkprivate.h: Send DND events
	  safely, in case drop window disappears. (Performance hit
	  because XSync()'s are necessary)

	* gdk/gdk.h gdk/gdkpixmap.c: Added
	  gdk_pixmap_colormap_create_from_xpm[_d] to allow creating
	  pixmaps from xpm's before you have a GdkWindow.
1998-03-08 21:47:14 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ctype.h>
#include <string.h>
#include "gdk/gdkkeysyms.h"
#ifdef USE_XIM
#include "gdk/gdkx.h"
#endif
#include "gtkmain.h"
#include "gtkselection.h"
#include "gtksignal.h"
#include "gtktext.h"
#include "line-wrap.xbm"
#include "line-arrow.xbm"
#define INITIAL_BUFFER_SIZE 1024
#define INITIAL_LINE_CACHE_SIZE 256
#define MIN_GAP_SIZE 256
#define LINE_DELIM '\n'
#define MIN_TEXT_WIDTH_LINES 20
#define MIN_TEXT_HEIGHT_LINES 10
#define TEXT_BORDER_ROOM 1
#define LINE_WRAP_ROOM 8 /* The bitmaps are 6 wide. */
#define DEFAULT_TAB_STOP_WIDTH 4
#define SCROLL_PIXELS 5
#define KEY_SCROLL_PIXELS 10
#define SCROLL_TIME 100
#define SET_PROPERTY_MARK(m, p, o) do { \
(m)->property = (p); \
(m)->offset = (o); \
} while (0)
#define MARK_CURRENT_PROPERTY(mark) ((TextProperty*)(mark)->property->data)
#define MARK_NEXT_PROPERTY(mark) ((TextProperty*)(mark)->property->next->data)
#define MARK_PREV_PROPERTY(mark) ((TextProperty*)((mark)->property->prev ? \
(mark)->property->prev->data \
: NULL))
#define MARK_PREV_LIST_PTR(mark) ((mark)->property->prev)
#define MARK_LIST_PTR(mark) ((mark)->property)
#define MARK_NEXT_LIST_PTR(mark) ((mark)->property->next)
#define MARK_OFFSET(mark) ((mark)->offset)
#define MARK_PROPERTY_LENGTH(mark) (MARK_CURRENT_PROPERTY(mark)->length)
#define MARK_CURRENT_FONT(mark) (((TextProperty*)(mark)->property->data)->font->gdk_font)
#define MARK_CURRENT_FORE(mark) (&((TextProperty*)(mark)->property->data)->fore_color)
#define MARK_CURRENT_BACK(mark) (&((TextProperty*)(mark)->property->data)->back_color)
#define MARK_CURRENT_TEXT_FONT(m) (((TextProperty*)(m)->property->data)->font)
#define TEXT_LENGTH(t) ((t)->text_end - (t)->gap_size)
#define FONT_HEIGHT(f) ((f)->ascent + (f)->descent)
#define LINE_HEIGHT(l) ((l).font_ascent + (l).font_descent)
#define LINE_CONTAINS(l, i) ((l).start.index <= (i) && (l).end.index >= (i))
#define LINE_STARTS_AT(l, i) ((l).start.index == (i))
#define LINE_START_PIXEL(l) ((l).tab_cont.pixel_offset)
#define LAST_INDEX(t, m) ((m).index == TEXT_LENGTH(t))
#define CACHE_DATA(c) (*(LineParams*)(c)->data)
typedef struct _TextFont TextFont;
typedef struct _TextProperty TextProperty;
typedef struct _TabStopMark TabStopMark;
typedef struct _PrevTabCont PrevTabCont;
typedef struct _FetchLinesData FetchLinesData;
typedef struct _LineParams LineParams;
typedef struct _SetVerticalScrollData SetVerticalScrollData;
typedef gint (*LineIteratorFunction) (GtkText* text, LineParams* lp, void* data);
typedef enum
{
FetchLinesPixels,
FetchLinesCount
} FLType;
struct _SetVerticalScrollData {
gint pixel_height;
gint last_didnt_wrap;
gint last_line_start;
GtkPropertyMark mark;
};
struct _TextFont
{
/* The actual font. */
GdkFont *gdk_font;
gint16 char_widths[256];
};
struct _TextProperty
{
/* Font. */
TextFont* font;
/* Background Color. */
GdkColor back_color;
/* Foreground Color. */
GdkColor fore_color;
/* Length of this property. */
guint length;
};
struct _TabStopMark
{
GList* tab_stops; /* Index into list containing the next tab position. If
* NULL, using default widths. */
gint to_next_tab;
};
struct _PrevTabCont
{
guint pixel_offset;
TabStopMark tab_start;
};
struct _FetchLinesData
{
GList* new_lines;
FLType fl_type;
gint data;
gint data_max;
};
struct _LineParams
{
guint font_ascent;
guint font_descent;
guint pixel_width;
guint displayable_chars;
guint wraps : 1;
PrevTabCont tab_cont;
PrevTabCont tab_cont_next;
GtkPropertyMark start;
GtkPropertyMark end;
};
static void gtk_text_class_init (GtkTextClass *klass);
static void gtk_text_init (GtkText *text);
static void gtk_text_destroy (GtkObject *object);
static void gtk_text_realize (GtkWidget *widget);
static void gtk_text_unrealize (GtkWidget *widget);
static void gtk_text_draw_focus (GtkWidget *widget);
static void gtk_text_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_text_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_text_adjustment (GtkAdjustment *adjustment,
GtkText *text);
static void gtk_text_disconnect (GtkAdjustment *adjustment,
GtkText *text);
static void gtk_text_insert_text (GtkEditable *editable,
const gchar *new_text,
gint new_text_length,
gint *position);
static void gtk_text_delete_text (GtkEditable *editable,
gint start_pos,
gint end_pos);
static void gtk_text_update_text (GtkEditable *editable,
gint start_pos,
gint end_pos);
static gchar *gtk_text_get_chars (GtkEditable *editable,
gint start,
gint end);
static void gtk_text_set_selection (GtkEditable *editable,
gint start,
gint end);
/* Event handlers */
static void gtk_text_draw (GtkWidget *widget,
GdkRectangle *area);
static gint gtk_text_expose (GtkWidget *widget,
GdkEventExpose *event);
static gint gtk_text_button_press (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_text_button_release (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_text_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gint gtk_text_key_press (GtkWidget *widget,
GdkEventKey *event);
static gint gtk_text_focus_in (GtkWidget *widget,
GdkEventFocus *event);
static gint gtk_text_focus_out (GtkWidget *widget,
GdkEventFocus *event);
static void move_gap_to_point (GtkText* text);
static void make_forward_space (GtkText* text, guint len);
static void insert_text_property (GtkText* text, GdkFont* font,
GdkColor *fore, GdkColor* back, guint len);
static void delete_text_property (GtkText* text, guint len);
static void init_properties (GtkText *text);
static guint pixel_height_of (GtkText* text, GList* cache_line);
/* Property Movement and Size Computations */
static void advance_mark (GtkPropertyMark* mark);
static void decrement_mark (GtkPropertyMark* mark);
static void advance_mark_n (GtkPropertyMark* mark, gint n);
static void decrement_mark_n (GtkPropertyMark* mark, gint n);
static void move_mark_n (GtkPropertyMark* mark, gint n);
static GtkPropertyMark find_mark (GtkText* text, guint mark_position);
static GtkPropertyMark find_mark_near (GtkText* text, guint mark_position, const GtkPropertyMark* near);
static void find_line_containing_point (GtkText* text, guint point,
gboolean scroll);
static TextProperty* new_text_property (GdkFont* font, GdkColor* fore, GdkColor* back, guint length);
/* Display */
static void compute_lines_pixels (GtkText* text, gint char_count,
guint *lines, guint *pixels);
static gint total_line_height (GtkText* text,
GList* line,
gint line_count);
static LineParams find_line_params (GtkText* text,
const GtkPropertyMark *mark,
const PrevTabCont *tab_cont,
PrevTabCont *next_cont);
static void recompute_geometry (GtkText* text);
static void insert_expose (GtkText* text, guint old_pixels, gint nchars, guint new_line_count);
static void delete_expose (GtkText* text,
gint nchars,
guint old_lines,
guint old_pixels);
static void clear_area (GtkText *text, GdkRectangle *area);
static void draw_line (GtkText* text,
gint pixel_height,
LineParams* lp);
static void draw_line_wrap (GtkText* text,
guint height);
static void draw_cursor (GtkText* text, gint absolute);
static void undraw_cursor (GtkText* text, gint absolute);
static gint drawn_cursor_min (GtkText* text);
static gint drawn_cursor_max (GtkText* text);
static void expose_text (GtkText* text, GdkRectangle *area, gboolean cursor);
/* Search and Placement. */
static void find_cursor (GtkText* text,
gboolean scroll);
static void find_cursor_at_line (GtkText* text,
const LineParams* start_line,
gint pixel_height);
static void find_mouse_cursor (GtkText* text, gint x, gint y);
/* Scrolling. */
static void adjust_adj (GtkText* text, GtkAdjustment* adj);
static void scroll_up (GtkText* text, gint diff);
static void scroll_down (GtkText* text, gint diff);
static void scroll_int (GtkText* text, gint diff);
static void process_exposes (GtkText *text);
/* Cache Management. */
static GList* remove_cache_line (GtkText* text, GList* list);
/* Key Motion. */
static void move_cursor_buffer_ver (GtkText *text, int dir);
static void move_cursor_page_ver (GtkText *text, int dir);
static void move_cursor_ver (GtkText *text, int count);
static void move_cursor_hor (GtkText *text, int count);
static void gtk_text_move_forward_character (GtkText *text);
static void gtk_text_move_backward_character (GtkText *text);
static void gtk_text_move_forward_word (GtkText *text);
static void gtk_text_move_backward_word (GtkText *text);
static void gtk_text_move_beginning_of_line (GtkText *text);
static void gtk_text_move_end_of_line (GtkText *text);
static void gtk_text_delete_forward_character (GtkText *text);
static void gtk_text_delete_backward_character (GtkText *text);
static void gtk_text_delete_forward_word (GtkText *text);
static void gtk_text_delete_backward_word (GtkText *text);
static void gtk_text_delete_line (GtkText *text);
static void gtk_text_delete_to_line_end (GtkText *text);
static void gtk_text_select_word (GtkText *text);
static void gtk_text_select_line (GtkText *text);
/* #define DEBUG_GTK_TEXT */
#if defined(DEBUG_GTK_TEXT) && defined(__GNUC__)
/* Debugging utilities. */
static void gtk_text_assert_mark (GtkText *text,
GtkPropertyMark *mark,
GtkPropertyMark *before,
GtkPropertyMark *after,
const gchar *msg,
const gchar *where,
gint line);
static void gtk_text_assert (GtkText *text,
const gchar *msg,
gint line);
static void gtk_text_show_cache_line (GtkText *text, GList *cache,
const char* what, const char* func, gint line);
static void gtk_text_show_cache (GtkText *text, const char* func, gint line);
static void gtk_text_show_adj (GtkText *text,
GtkAdjustment *adj,
const char* what,
const char* func,
gint line);
static void gtk_text_show_props (GtkText* test,
const char* func,
int line);
#define TDEBUG(args) g_print args
#define TEXT_ASSERT(text) gtk_text_assert (text,__PRETTY_FUNCTION__,__LINE__)
#define TEXT_ASSERT_MARK(text,mark,msg) gtk_text_assert_mark (text,mark, \
__PRETTY_FUNCTION__,msg,__LINE__)
#define TEXT_SHOW(text) gtk_text_show_cache (text, __PRETTY_FUNCTION__,__LINE__)
#define TEXT_SHOW_LINE(text,line,msg) gtk_text_show_cache_line (text,line,msg,\
__PRETTY_FUNCTION__,__LINE__)
#define TEXT_SHOW_ADJ(text,adj,msg) gtk_text_show_adj (text,adj,msg, \
__PRETTY_FUNCTION__,__LINE__)
#else
#define TDEBUG(args)
#define TEXT_ASSERT(text)
#define TEXT_ASSERT_MARK(text,mark,msg)
#define TEXT_SHOW(text)
#define TEXT_SHOW_LINE(text,line,msg)
#define TEXT_SHOW_ADJ(text,adj,msg)
#endif
/* Memory Management. */
static GMemChunk *params_mem_chunk = NULL;
static GMemChunk *text_property_chunk = NULL;
static GtkWidgetClass *parent_class = NULL;
static GtkTextFunction control_keys[26] =
{
(GtkTextFunction)gtk_text_move_beginning_of_line, /* a */
(GtkTextFunction)gtk_text_move_backward_character, /* b */
gtk_editable_copy_clipboard, /* c */
(GtkTextFunction)gtk_text_delete_forward_character, /* d */
(GtkTextFunction)gtk_text_move_end_of_line, /* e */
(GtkTextFunction)gtk_text_move_forward_character, /* f */
NULL, /* g */
(GtkTextFunction)gtk_text_delete_backward_character, /* h */
NULL, /* i */
NULL, /* j */
(GtkTextFunction)gtk_text_delete_to_line_end, /* k */
NULL, /* l */
NULL, /* m */
NULL, /* n */
NULL, /* o */
NULL, /* p */
NULL, /* q */
NULL, /* r */
NULL, /* s */
NULL, /* t */
(GtkTextFunction)gtk_text_delete_line, /* u */
gtk_editable_paste_clipboard, /* v */
(GtkTextFunction)gtk_text_delete_backward_word, /* w */
gtk_editable_cut_clipboard, /* x */
NULL, /* y */
NULL, /* z */
};
static GtkTextFunction alt_keys[26] =
{
NULL, /* a */
(GtkTextFunction)gtk_text_move_backward_word, /* b */
NULL, /* c */
(GtkTextFunction)gtk_text_delete_forward_word, /* d */
NULL, /* e */
(GtkTextFunction)gtk_text_move_forward_word, /* f */
NULL, /* g */
NULL, /* h */
NULL, /* i */
NULL, /* j */
NULL, /* k */
NULL, /* l */
NULL, /* m */
NULL, /* n */
NULL, /* o */
NULL, /* p */
NULL, /* q */
NULL, /* r */
NULL, /* s */
NULL, /* t */
NULL, /* u */
NULL, /* v */
NULL, /* w */
NULL, /* x */
NULL, /* y */
NULL, /* z */
};
/**********************************************************************/
/* Widget Crap */
/**********************************************************************/
guint
gtk_text_get_type ()
{
static guint text_type = 0;
if (!text_type)
{
GtkTypeInfo text_info =
{
"GtkText",
sizeof (GtkText),
sizeof (GtkTextClass),
(GtkClassInitFunc) gtk_text_class_init,
(GtkObjectInitFunc) gtk_text_init,
(GtkArgSetFunc) NULL,
(GtkArgGetFunc) NULL,
};
text_type = gtk_type_unique (gtk_editable_get_type (), &text_info);
}
return text_type;
}
static void
gtk_text_class_init (GtkTextClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkEditableClass *editable_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
editable_class = (GtkEditableClass*) class;
parent_class = gtk_type_class (gtk_editable_get_type ());
object_class->destroy = gtk_text_destroy;
widget_class->realize = gtk_text_realize;
widget_class->unrealize = gtk_text_unrealize;
widget_class->draw_focus = gtk_text_draw_focus;
widget_class->size_request = gtk_text_size_request;
widget_class->size_allocate = gtk_text_size_allocate;
widget_class->draw = gtk_text_draw;
widget_class->expose_event = gtk_text_expose;
widget_class->button_press_event = gtk_text_button_press;
widget_class->button_release_event = gtk_text_button_release;
widget_class->motion_notify_event = gtk_text_motion_notify;
widget_class->key_press_event = gtk_text_key_press;
widget_class->focus_in_event = gtk_text_focus_in;
widget_class->focus_out_event = gtk_text_focus_out;
editable_class->insert_text = gtk_text_insert_text;
editable_class->delete_text = gtk_text_delete_text;
editable_class->update_text = gtk_text_update_text;
editable_class->get_chars = gtk_text_get_chars;
editable_class->set_selection = gtk_text_set_selection;
}
static void
gtk_text_init (GtkText *text)
{
GTK_WIDGET_SET_FLAGS (text, GTK_CAN_FOCUS);
text->text = g_new (guchar, INITIAL_BUFFER_SIZE);
text->text_len = INITIAL_BUFFER_SIZE;
if (!params_mem_chunk)
params_mem_chunk = g_mem_chunk_new ("LineParams",
sizeof (LineParams),
256 * sizeof (LineParams),
G_ALLOC_AND_FREE);
text->default_tab_width = 4;
text->tab_stops = NULL;
text->tab_stops = g_list_prepend (text->tab_stops, (void*)8);
text->tab_stops = g_list_prepend (text->tab_stops, (void*)8);
text->line_wrap = TRUE;
text->timer = 0;
GTK_EDITABLE(text)->editable = FALSE;
}
GtkWidget*
gtk_text_new (GtkAdjustment *hadj,
GtkAdjustment *vadj)
{
GtkText *text;
text = gtk_type_new (gtk_text_get_type ());
gtk_text_set_adjustments (text, hadj, vadj);
return GTK_WIDGET (text);
}
void
gtk_text_set_editable (GtkText *text,
gint editable)
{
GtkWidget *widget;
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
widget = GTK_WIDGET (text);
GTK_EDITABLE(text)->editable = (editable != FALSE);
if (editable)
draw_cursor (text, TRUE);
else
undraw_cursor (text, TRUE);
if (GTK_WIDGET_DRAWABLE (widget) &&
widget->style->bg_pixmap[GTK_STATE_NORMAL])
{
gdk_window_clear (widget->window); /* just the border */
gtk_widget_queue_draw (widget);
}
}
void
gtk_text_set_adjustments (GtkText *text,
GtkAdjustment *hadj,
GtkAdjustment *vadj)
{
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
if (text->hadj && (text->hadj != hadj))
{
gtk_signal_disconnect_by_data (GTK_OBJECT (text->hadj), text);
gtk_object_unref (GTK_OBJECT (text->hadj));
}
if (text->vadj && (text->vadj != vadj))
{
gtk_signal_disconnect_by_data (GTK_OBJECT (text->vadj), text);
gtk_object_unref (GTK_OBJECT (text->vadj));
}
if (!hadj)
hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
if (!vadj)
vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
if (text->hadj != hadj)
{
text->hadj = hadj;
gtk_object_ref (GTK_OBJECT (text->hadj));
gtk_object_sink (GTK_OBJECT (text->hadj));
gtk_signal_connect (GTK_OBJECT (text->hadj), "changed",
(GtkSignalFunc) gtk_text_adjustment,
text);
gtk_signal_connect (GTK_OBJECT (text->hadj), "value_changed",
(GtkSignalFunc) gtk_text_adjustment,
text);
gtk_signal_connect (GTK_OBJECT (text->hadj), "disconnect",
(GtkSignalFunc) gtk_text_disconnect,
text);
}
if (text->vadj != vadj)
{
text->vadj = vadj;
gtk_object_ref (GTK_OBJECT (text->vadj));
gtk_object_sink (GTK_OBJECT (text->vadj));
gtk_signal_connect (GTK_OBJECT (text->vadj), "changed",
(GtkSignalFunc) gtk_text_adjustment,
text);
gtk_signal_connect (GTK_OBJECT (text->vadj), "value_changed",
(GtkSignalFunc) gtk_text_adjustment,
text);
gtk_signal_connect (GTK_OBJECT (text->vadj), "disconnect",
(GtkSignalFunc) gtk_text_disconnect,
text);
}
}
void
gtk_text_set_point (GtkText *text,
guint index)
{
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
g_return_if_fail (index >= 0 && index <= TEXT_LENGTH (text));
text->point = find_mark (text, index);
}
guint
gtk_text_get_point (GtkText *text)
{
g_return_val_if_fail (text != NULL, 0);
g_return_val_if_fail (GTK_IS_TEXT (text), 0);
return text->point.index;
}
guint
gtk_text_get_length (GtkText *text)
{
g_return_val_if_fail (text != NULL, 0);
g_return_val_if_fail (GTK_IS_TEXT (text), 0);
return TEXT_LENGTH (text);
}
void
gtk_text_freeze (GtkText *text)
{
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
text->freeze = TRUE;
}
void
gtk_text_thaw (GtkText *text)
{
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
text->freeze = FALSE;
if (GTK_WIDGET_DRAWABLE (text))
{
recompute_geometry (text);
gtk_widget_queue_draw (GTK_WIDGET (text));
}
}
void
gtk_text_insert (GtkText *text,
GdkFont *font,
GdkColor *fore,
GdkColor *back,
const char *chars,
gint length)
{
gint i;
GtkEditable *editable = GTK_EDITABLE (text);
gint new_line_count = 1;
guint old_height = 0;
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
/* This must be because we need to have the style set up. */
g_assert (GTK_WIDGET_REALIZED(text));
if (fore == NULL)
fore = &GTK_WIDGET (text)->style->text[GTK_STATE_NORMAL];
if (back == NULL)
back = &GTK_WIDGET (text)->style->base[GTK_STATE_NORMAL];
if (length < 0)
length = strlen (chars);
if (length == 0)
return;
if (!text->freeze && (text->line_start_cache != NULL))
{
find_line_containing_point (text, text->point.index, TRUE);
old_height = total_line_height (text, text->current_line, 1);
for (i=0; i<length; i++)
if (chars[i] == '\n')
new_line_count++;
}
if (text->point.index < text->first_line_start_index)
text->first_line_start_index += length;
if (text->point.index < editable->selection_start_pos)
editable->selection_start_pos += length;
if (text->point.index < editable->selection_end_pos)
editable->selection_end_pos += length;
move_gap_to_point (text);
if (font == NULL)
font = GTK_WIDGET (text)->style->font;
make_forward_space (text, length);
memcpy (text->text + text->gap_position, chars, length);
insert_text_property (text, font, fore, back, length);
text->gap_size -= length;
text->gap_position += length;
advance_mark_n (&text->point, length);
if (!text->freeze && (text->line_start_cache != NULL))
insert_expose (text, old_height, length, new_line_count);
}
gint
gtk_text_backward_delete (GtkText *text,
guint nchars)
{
g_return_val_if_fail (text != NULL, 0);
g_return_val_if_fail (GTK_IS_TEXT (text), 0);
if (nchars > text->point.index || nchars <= 0)
return FALSE;
gtk_text_set_point (text, text->point.index - nchars);
return gtk_text_forward_delete (text, nchars);
}
gint
gtk_text_forward_delete (GtkText *text,
guint nchars)
{
guint old_lines, old_height;
GtkEditable *editable = GTK_EDITABLE (text);
g_return_val_if_fail (text != NULL, 0);
g_return_val_if_fail (GTK_IS_TEXT (text), 0);
if (text->point.index + nchars > TEXT_LENGTH (text) || nchars <= 0)
return FALSE;
if (!text->freeze && (text->line_start_cache != NULL))
{
find_line_containing_point (text, text->point.index, TRUE);
compute_lines_pixels (text, nchars, &old_lines, &old_height);
}
if (text->point.index < text->first_line_start_index)
{
if (text->point.index >= text->first_line_start_index - nchars)
{
text->first_line_start_index = text->point.index;
while ((text->first_line_start_index > 0) &&
(GTK_TEXT_INDEX (text, text->first_line_start_index - 1) != LINE_DELIM))
text->first_line_start_index -= 1;
}
else
text->first_line_start_index -= nchars;
}
if (text->point.index < editable->selection_start_pos)
editable->selection_start_pos -= nchars;
if (text->point.index < editable->selection_end_pos)
editable->selection_end_pos -= nchars;
move_gap_to_point (text);
text->gap_size += nchars;
delete_text_property (text, nchars);
if (!text->freeze && (text->line_start_cache != NULL))
delete_expose (text, nchars, old_lines, old_height);
return TRUE;
}
static gchar *
gtk_text_get_chars (GtkEditable *editable,
gint start_pos,
gint end_pos)
{
GtkText *text;
gchar *retval;
gchar *p;
guint n, nchars;
if (end_pos < 0)
end_pos = TEXT_LENGTH (text);
g_return_val_if_fail (editable != NULL, NULL);
g_return_val_if_fail (GTK_IS_TEXT (editable), NULL);
text = GTK_TEXT (editable);
if (end_pos > TEXT_LENGTH (text))
return NULL;
nchars = end_pos - start_pos;
retval = g_new (gchar, nchars+1);
p = retval;
if (start_pos < text->gap_position)
{
n = MIN (text->gap_position - start_pos, nchars);
memcpy (p, &text->text[start_pos], n);
p += n;
start_pos += n;
nchars -= n;
}
if (start_pos+nchars >= text->gap_position)
{
memcpy (p,
text->text + MAX (text->gap_position + text->gap_size,
start_pos + text->gap_size),
nchars);
p += nchars;
}
*p = 0;
return retval;
}
static void
gtk_text_destroy (GtkObject *object)
{
GtkText *text;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_TEXT (object));
text = (GtkText *)object;
if (text->hadj)
{
gtk_object_unref (GTK_OBJECT (text->hadj));
text->hadj = NULL;
}
if (text->vadj)
{
gtk_object_unref (GTK_OBJECT (text->vadj));
text->vadj = NULL;
}
if (text->timer)
{
gtk_timeout_remove (text->timer);
text->timer = 0;
}
GTK_OBJECT_CLASS(parent_class)->destroy (object);
}
static void
gtk_text_realize (GtkWidget *widget)
{
GtkText *text;
GtkEditable *editable;
GdkWindowAttr attributes;
gint attributes_mask;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_TEXT (widget));
text = GTK_TEXT (widget);
editable = GTK_EDITABLE (widget);
GTK_WIDGET_SET_FLAGS (text, 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);
attributes.event_mask |= (GDK_EXPOSURE_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON_MOTION_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_KEY_PRESS_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
gdk_window_set_user_data (widget->window, text);
attributes.x = (widget->style->klass->xthickness + TEXT_BORDER_ROOM);
attributes.y = (widget->style->klass->ythickness + TEXT_BORDER_ROOM);
attributes.width = widget->allocation.width - attributes.x * 2;
attributes.height = widget->allocation.height - attributes.y * 2;
text->text_area = gdk_window_new (widget->window, &attributes, attributes_mask);
gdk_window_set_user_data (text->text_area, text);
widget->style = gtk_style_attach (widget->style, widget->window);
/* Can't call gtk_style_set_background here because it's handled specially */
gdk_window_set_background (widget->window, &widget->style->base[GTK_STATE_NORMAL]);
gdk_window_set_background (text->text_area, &widget->style->base[GTK_STATE_NORMAL]);
text->line_wrap_bitmap = gdk_bitmap_create_from_data (text->text_area,
(gchar*) line_wrap_bits,
line_wrap_width,
line_wrap_height);
text->line_arrow_bitmap = gdk_bitmap_create_from_data (text->text_area,
(gchar*) line_arrow_bits,
line_arrow_width,
line_arrow_height);
text->gc = gdk_gc_new (text->text_area);
gdk_gc_set_exposures (text->gc, TRUE);
gdk_gc_set_foreground (text->gc, &widget->style->text[GTK_STATE_NORMAL]);
#ifdef USE_XIM
if (gdk_im_ready ())
{
GdkPoint spot;
GdkRectangle rect;
gint width, height;
GdkEventMask mask;
GdkIMStyle style;
GdkIMStyle supported_style = GdkIMPreeditNone | GdkIMPreeditNothing |
GdkIMPreeditPosition |
GdkIMStatusNone | GdkIMStatusNothing;
if (widget->style && widget->style->font->type != GDK_FONT_FONTSET)
supported_style &= ~GdkIMPreeditPosition;
style = gdk_im_decide_style (supported_style);
switch (style & GdkIMPreeditMask)
{
case GdkIMPreeditPosition:
if (widget->style && widget->style->font->type != GDK_FONT_FONTSET)
{
g_warning ("over-the-spot style requires fontset");
break;
}
gdk_window_get_size (text->text_area, &width, &height);
rect.x = 0;
rect.y = 0;
rect.width = width;
rect.height = height;
spot.x = 0;
spot.y = height;
editable->ic = gdk_ic_new (text->text_area, text->text_area,
style,
"spotLocation", &spot,
"area", &rect,
"fontSet", GDK_FONT_XFONT (widget->style->font),
NULL);
break;
default:
editable->ic = gdk_ic_new (text->text_area, text->text_area,
style, NULL);
}
if (editable->ic == NULL)
g_warning ("Can't create input context.");
else
{
GdkColormap *colormap;
mask = gdk_window_get_events (text->text_area);
mask |= gdk_ic_get_events (editable->ic);
gdk_window_set_events (text->text_area, mask);
if ((colormap = gtk_widget_get_colormap (widget)) !=
gtk_widget_get_default_colormap ())
{
gdk_ic_set_attr (editable->ic, "preeditAttributes",
"colorMap", GDK_COLORMAP_XCOLORMAP (colormap),
NULL);
}
}
}
#endif
init_properties (text);
gdk_window_show (text->text_area);
if (editable->selection_start_pos != editable->selection_end_pos)
gtk_editable_claim_selection (editable, TRUE, GDK_CURRENT_TIME);
}
static void
gtk_text_unrealize (GtkWidget *widget)
{
GtkText *text;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_TEXT (widget));
text = GTK_TEXT (widget);
gdk_window_set_user_data (text->text_area, NULL);
gdk_window_destroy (text->text_area);
text->text_area = NULL;
gdk_gc_destroy (text->gc);
text->gc = NULL;
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
clear_focus_area (GtkText *text, gint area_x, gint area_y, gint area_width, gint area_height)
{
GtkWidget *widget = GTK_WIDGET (text);
gint ythick = TEXT_BORDER_ROOM + widget->style->klass->ythickness;
gint xthick = TEXT_BORDER_ROOM + widget->style->klass->xthickness;
gint width, height;
gint xorig, yorig;
gint x, y;
gdk_window_get_size (widget->style->bg_pixmap[GTK_STATE_NORMAL], &width, &height);
yorig = - text->first_onscreen_ver_pixel + ythick;
xorig = - text->first_onscreen_hor_pixel + xthick;
while (yorig > 0)
yorig -= height;
while (xorig > 0)
xorig -= width;
for (y = area_y; y < area_y + area_height; )
{
gint yoff = (y - yorig) % height;
gint yw = MIN(height - yoff, (area_y + area_height) - y);
for (x = area_x; x < area_x + area_width; )
{
gint xoff = (x - xorig) % width;
gint xw = MIN(width - xoff, (area_x + area_width) - x);
gdk_draw_pixmap (widget->window,
text->gc,
widget->style->bg_pixmap[GTK_STATE_NORMAL],
xoff,
yoff,
x,
y,
xw,
yw);
x += width - xoff;
}
y += height - yoff;
}
}
static void
gtk_text_draw_focus (GtkWidget *widget)
{
GtkText *text;
gint width, height;
gint x, y;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_TEXT (widget));
text = GTK_TEXT (widget);
if (GTK_WIDGET_DRAWABLE (widget))
{
gint ythick = widget->style->klass->ythickness;
gint xthick = widget->style->klass->xthickness;
gint xextra = TEXT_BORDER_ROOM;
gint yextra = TEXT_BORDER_ROOM;
TDEBUG (("in gtk_text_draw_focus\n"));
x = 0;
y = 0;
width = widget->allocation.width;
height = widget->allocation.height;
if (GTK_WIDGET_HAS_FOCUS (widget))
{
x += 1;
y += 1;
width -= 2;
height -= 2;
xextra -= 1;
yextra -= 1;
gdk_draw_rectangle (widget->window,
widget->style->fg_gc[GTK_STATE_NORMAL],
FALSE, 0, 0,
widget->allocation.width - 1,
widget->allocation.height - 1);
}
gtk_draw_shadow (widget->style, widget->window,
GTK_STATE_NORMAL, GTK_SHADOW_IN,
x, y, width, height);
x += xthick;
y += ythick;
width -= 2 * xthick;
height -= 2 * ythick;
if (widget->style->bg_pixmap[GTK_STATE_NORMAL] &&
!GTK_EDITABLE (text)->editable)
{
/* top rect */
clear_focus_area (text, x, y, width, yextra);
/* left rect */
clear_focus_area (text, x, y + yextra,
xextra, y + height - 2 * yextra);
/* right rect */
clear_focus_area (text, x + width - xextra, y + yextra,
xextra, height - 2 * ythick);
/* bottom rect */
clear_focus_area (text, x, x + height - yextra, width, yextra);
}
else if (!GTK_WIDGET_HAS_FOCUS (widget))
{
gdk_draw_rectangle (widget->window,
widget->style->base_gc[GTK_STATE_NORMAL], FALSE,
x, y,
width - 1,
height - 1);
}
}
else
{
TDEBUG (("in gtk_text_draw_focus (undrawable !!!)\n"));
}
}
static void
gtk_text_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
gint xthickness;
gint ythickness;
gint char_height;
gint char_width;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_TEXT (widget));
g_return_if_fail (requisition != NULL);
xthickness = widget->style->klass->xthickness + TEXT_BORDER_ROOM;
ythickness = widget->style->klass->ythickness + TEXT_BORDER_ROOM;
char_height = MIN_TEXT_HEIGHT_LINES * (widget->style->font->ascent +
widget->style->font->descent);
char_width = MIN_TEXT_WIDTH_LINES * (gdk_text_width (widget->style->font,
"ABCDEFGHIJKLMNOPQRSTUVWXYZ",
26)
/ 26);
requisition->width = char_width + xthickness * 2;
requisition->height = char_height + ythickness * 2;
}
static void
gtk_text_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkText *text;
GtkEditable *editable;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_TEXT (widget));
g_return_if_fail (allocation != NULL);
text = GTK_TEXT (widget);
editable = GTK_EDITABLE (widget);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gdk_window_move_resize (text->text_area,
widget->style->klass->xthickness + TEXT_BORDER_ROOM,
widget->style->klass->ythickness + TEXT_BORDER_ROOM,
widget->allocation.width - (widget->style->klass->xthickness +
TEXT_BORDER_ROOM) * 2,
widget->allocation.height - (widget->style->klass->ythickness +
TEXT_BORDER_ROOM) * 2);
#ifdef USE_XIM
if (editable->ic && (gdk_ic_get_style (editable->ic) & GdkIMPreeditPosition))
{
gint width, height;
GdkRectangle rect;
gdk_window_get_size (text->text_area, &width, &height);
rect.x = 0;
rect.y = 0;
rect.width = width;
rect.height = height;
gdk_ic_set_attr (editable->ic, "preeditAttributes", "area", &rect, NULL);
}
#endif
recompute_geometry (text);
}
}
static void
gtk_text_draw (GtkWidget *widget,
GdkRectangle *area)
{
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_TEXT (widget));
g_return_if_fail (area != NULL);
if (GTK_WIDGET_DRAWABLE (widget))
{
expose_text (GTK_TEXT (widget), area, TRUE);
gtk_widget_draw_focus (widget);
}
}
static gint
gtk_text_expose (GtkWidget *widget,
GdkEventExpose *event)
{
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->window == GTK_TEXT (widget)->text_area)
{
TDEBUG (("in gtk_text_expose (expose)\n"));
expose_text (GTK_TEXT (widget), &event->area, TRUE);
}
else if (event->count == 0)
{
TDEBUG (("in gtk_text_expose (focus)\n"));
gtk_widget_draw_focus (widget);
}
return FALSE;
}
static gint
gtk_text_scroll_timeout (gpointer data)
{
GtkText *text;
GdkEventMotion event;
gint x, y;
GdkModifierType mask;
g_return_val_if_fail (GTK_IS_TEXT (data), FALSE);
text = GTK_TEXT (data);
text->timer = 0;
gdk_window_get_pointer (text->text_area, &x, &y, &mask);
if (!(mask & (GDK_BUTTON1_MASK | GDK_BUTTON3_MASK)))
return FALSE;
event.is_hint = 0;
event.x = x;
event.y = y;
event.state = mask;
gtk_text_motion_notify (GTK_WIDGET (text), &event);
return FALSE;
}
static gint
gtk_text_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkText *text;
GtkEditable *editable;
static GdkAtom ctext_atom = GDK_NONE;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (ctext_atom == GDK_NONE)
ctext_atom = gdk_atom_intern ("COMPOUND_TEXT", FALSE);
text = GTK_TEXT (widget);
editable = GTK_EDITABLE (widget);
if (!GTK_WIDGET_HAS_FOCUS (widget))
gtk_widget_grab_focus (widget);
if (event->type == GDK_BUTTON_PRESS && event->button != 2)
gtk_grab_add (widget);
if (event->button == 1)
{
switch (event->type)
{
case GDK_BUTTON_PRESS:
undraw_cursor (text, FALSE);
find_mouse_cursor (text, event->x, event->y);
draw_cursor (text, FALSE);
/* Set it now, so we display things right. We'll unset it
* later if things don't work out */
editable->has_selection = TRUE;
gtk_text_set_selection (GTK_EDITABLE(text),
text->cursor_mark.index,
text->cursor_mark.index);
break;
case GDK_2BUTTON_PRESS:
gtk_text_select_word (text);
break;
case GDK_3BUTTON_PRESS:
gtk_text_select_line (text);
break;
default:
break;
}
}
else if (event->type == GDK_BUTTON_PRESS)
{
if ((event->button == 2) && editable->editable)
{
if (editable->selection_start_pos == editable->selection_end_pos ||
editable->has_selection)
{
undraw_cursor (text, FALSE);
find_mouse_cursor (text, event->x, event->y);
draw_cursor (text, FALSE);
}
gtk_selection_convert (widget, GDK_SELECTION_PRIMARY,
ctext_atom, event->time);
}
else
{
undraw_cursor (text, FALSE);
find_mouse_cursor (text, event->x, event->y);
draw_cursor (text, FALSE);
gtk_text_set_selection (GTK_EDITABLE(text),
text->cursor_mark.index,
text->cursor_mark.index);
editable->has_selection = FALSE;
if (gdk_selection_owner_get (GDK_SELECTION_PRIMARY) == widget->window)
gtk_selection_owner_set (NULL, GDK_SELECTION_PRIMARY, event->time);
}
}
return FALSE;
}
static gint
gtk_text_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkText *text;
GtkEditable *editable;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
text = GTK_TEXT (widget);
if (text->timer)
{
gtk_timeout_remove (text->timer);
text->timer = 0;
}
if (event->button == 1)
{
text = GTK_TEXT (widget);
editable = GTK_EDITABLE (widget);
gtk_grab_remove (widget);
editable->has_selection = FALSE;
if (editable->selection_start_pos != editable->selection_end_pos)
{
if (gtk_selection_owner_set (widget,
GDK_SELECTION_PRIMARY,
event->time))
editable->has_selection = TRUE;
else
gtk_text_update_text (editable, editable->selection_start_pos,
editable->selection_end_pos);
}
else
{
if (gdk_selection_owner_get (GDK_SELECTION_PRIMARY) == widget->window)
gtk_selection_owner_set (NULL, GDK_SELECTION_PRIMARY, event->time);
}
}
else if (event->button == 3)
{
gtk_grab_remove (widget);
}
undraw_cursor (text, FALSE);
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
return FALSE;
}
static gint
gtk_text_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkText *text;
gint x, y;
gint height;
GdkModifierType mask;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
text = GTK_TEXT (widget);
x = event->x;
y = event->y;
mask = event->state;
if (event->is_hint || (text->text_area != event->window))
{
gdk_window_get_pointer (text->text_area, &x, &y, &mask);
}
if (!(mask & (GDK_BUTTON1_MASK | GDK_BUTTON3_MASK)))
return FALSE;
gdk_window_get_size (text->text_area, NULL, &height);
if ((y < 0) || (y > height))
{
if (text->timer == 0)
{
text->timer = gtk_timeout_add (SCROLL_TIME,
gtk_text_scroll_timeout,
text);
if (y < 0)
scroll_int (text, y/2);
else
scroll_int (text, (y - height)/2);
}
else
return FALSE;
}
undraw_cursor (GTK_TEXT (widget), FALSE);
find_mouse_cursor (GTK_TEXT (widget), x, y);
draw_cursor (GTK_TEXT (widget), FALSE);
gtk_text_set_selection (GTK_EDITABLE(text),
GTK_EDITABLE(text)->selection_start_pos,
text->cursor_mark.index);
return FALSE;
}
static void
gtk_text_insert_1_at_point (GtkText* text, gchar key)
{
gtk_text_insert (text,
MARK_CURRENT_FONT (&text->point),
MARK_CURRENT_FORE (&text->point),
MARK_CURRENT_BACK (&text->point),
&key, 1);
}
static void
gtk_text_insert_text (GtkEditable *editable,
const gchar *new_text,
gint new_text_length,
gint *position)
{
GtkText *text = GTK_TEXT (editable);
gtk_text_set_point (text, *position);
gtk_text_insert (text,
MARK_CURRENT_FONT (&text->point),
MARK_CURRENT_FORE (&text->point),
MARK_CURRENT_BACK (&text->point),
new_text, new_text_length);
*position = text->point.index;
}
static void
gtk_text_delete_text (GtkEditable *editable,
gint start_pos,
gint end_pos)
{
GtkText *text = GTK_TEXT (editable);
gtk_text_set_point (text, start_pos);
if (end_pos < 0)
end_pos = TEXT_LENGTH (text);
gtk_text_forward_delete (text, end_pos - start_pos);
}
static gint
gtk_text_key_press (GtkWidget *widget,
GdkEventKey *event)
{
GtkText *text;
GtkEditable *editable;
gchar key;
gint return_val;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
return_val = FALSE;
text = GTK_TEXT (widget);
editable = GTK_EDITABLE (widget);
key = event->keyval;
return_val = TRUE;
if (GTK_EDITABLE(text)->editable == FALSE)
{
switch (event->keyval)
{
case GDK_Home: scroll_int (text, -text->vadj->value); break;
case GDK_End: scroll_int (text, +text->vadj->upper); break;
case GDK_Page_Up: scroll_int (text, -text->vadj->page_increment); break;
case GDK_Page_Down: scroll_int (text, +text->vadj->page_increment); break;
case GDK_Up: scroll_int (text, -KEY_SCROLL_PIXELS); break;
case GDK_Down: scroll_int (text, +KEY_SCROLL_PIXELS); break;
default:
return_val = FALSE;
break;
}
}
else
{
gint extend_selection;
gint extend_start;
text->point = find_mark (text, text->cursor_mark.index);
extend_selection = event->state & GDK_SHIFT_MASK;
extend_start = FALSE;
if (extend_selection)
{
editable->has_selection = TRUE;
if (editable->selection_start_pos == editable->selection_end_pos)
{
editable->selection_start_pos = text->point.index;
editable->selection_end_pos = text->point.index;
}
extend_start = (text->point.index == editable->selection_start_pos);
}
switch (event->keyval)
{
case GDK_Home: move_cursor_buffer_ver (text, -1); break;
case GDK_End: move_cursor_buffer_ver (text, +1); break;
case GDK_Page_Up: move_cursor_page_ver (text, -1); break;
case GDK_Page_Down: move_cursor_page_ver (text, +1); break;
case GDK_Up: move_cursor_ver (text, -1); break;
case GDK_Down: move_cursor_ver (text, +1); break;
case GDK_Left: move_cursor_hor (text, -1); break;
case GDK_Right: move_cursor_hor (text, +1); break;
case GDK_BackSpace:
if (editable->selection_start_pos != editable->selection_end_pos)
{
gtk_editable_delete_selection (editable);
break;
}
if (text->has_cursor && text->cursor_mark.index != 0)
{
if (event->state & GDK_CONTROL_MASK)
gtk_text_delete_backward_word (text);
else
gtk_text_backward_delete (text, 1);
}
break;
case GDK_Delete:
if (editable->selection_start_pos != editable->selection_end_pos)
{
gtk_editable_delete_selection (editable);
break;
}
if (text->has_cursor && !LAST_INDEX(text, text->cursor_mark))
{
if (event->state & GDK_CONTROL_MASK)
gtk_text_delete_forward_word (text);
else
gtk_text_forward_delete (text, 1);
}
break;
case GDK_Tab:
if (!text->has_cursor)
break;
gtk_text_insert_1_at_point (text, '\t');
break;
case GDK_Return:
if (!text->has_cursor)
break;
gtk_text_insert_1_at_point (text, '\n');
break;
case GDK_Escape:
/* Don't insert literally */
return_val = FALSE;
break;
default:
return_val = FALSE;
if (!text->has_cursor)
break;
if (event->state & GDK_CONTROL_MASK)
{
if ((key >= 'A') && (key <= 'Z'))
key -= 'A' - 'a';
if ((key >= 'a') && (key <= 'z') && control_keys[(int) (key - 'a')])
{
(* control_keys[(int) (key - 'a')]) (editable, event->time);
return_val = TRUE;
}
break;
}
else if (event->state & GDK_MOD1_MASK)
{
if ((key >= 'A') && (key <= 'Z'))
key -= 'A' - 'a';
if ((key >= 'a') && (key <= 'z') && alt_keys[(int) (key - 'a')])
{
(* alt_keys[(int) (key - 'a')]) (editable, event->time);
return_val = TRUE;
}
break;
}
else if (event->length > 0)
{
extend_selection = FALSE;
if (event->length == 1)
{
gtk_editable_delete_selection (editable);
gtk_text_insert_1_at_point (text, event->string[0]);
gtk_editable_changed (editable);
}
return_val = TRUE;
}
else
return_val = FALSE;
}
if (return_val)
{
if (extend_selection)
{
if (editable->current_pos < editable->selection_start_pos)
gtk_text_set_selection (editable, editable->current_pos,
editable->selection_end_pos);
else if (editable->current_pos > editable->selection_end_pos)
gtk_text_set_selection (editable, editable->selection_start_pos,
editable->current_pos);
else
{
if (extend_start)
gtk_text_set_selection (editable, editable->current_pos,
editable->selection_end_pos);
else
gtk_text_set_selection (editable, editable->selection_start_pos,
editable->current_pos);
}
}
else
gtk_text_set_selection (editable, 0, 0);
gtk_editable_claim_selection (editable,
editable->selection_start_pos != editable->selection_end_pos,
event->time);
}
}
return return_val;
}
static gint
gtk_text_focus_in (GtkWidget *widget,
GdkEventFocus *event)
{
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
TDEBUG (("in gtk_text_focus_in\n"));
GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
gtk_widget_draw_focus (widget);
#ifdef USE_XIM
if (GTK_EDITABLE(widget)->ic)
gdk_im_begin (GTK_EDITABLE(widget)->ic, GTK_TEXT(widget)->text_area);
#endif
draw_cursor (GTK_TEXT(widget), TRUE);
return FALSE;
}
static gint
gtk_text_focus_out (GtkWidget *widget,
GdkEventFocus *event)
{
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
TDEBUG (("in gtk_text_focus_out\n"));
GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
gtk_widget_draw_focus (widget);
undraw_cursor (GTK_TEXT(widget), TRUE);
#ifdef USE_XIM
gdk_im_end ();
#endif
return FALSE;
}
static void
gtk_text_adjustment (GtkAdjustment *adjustment,
GtkText *text)
{
g_return_if_fail (adjustment != NULL);
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
if (adjustment == text->hadj)
{
g_warning ("horizontal scrolling not implemented");
}
else
{
gint diff = ((gint)adjustment->value) - text->last_ver_value;
if (diff != 0)
{
undraw_cursor (text, FALSE);
if (diff > 0)
scroll_down (text, diff);
else /* if (diff < 0) */
scroll_up (text, diff);
draw_cursor (text, FALSE);
text->last_ver_value = adjustment->value;
}
}
}
static void
gtk_text_disconnect (GtkAdjustment *adjustment,
GtkText *text)
{
g_return_if_fail (adjustment != NULL);
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
g_return_if_fail (text != NULL);
g_return_if_fail (GTK_IS_TEXT (text));
if (adjustment == text->hadj)
text->hadj = NULL;
if (adjustment == text->vadj)
text->vadj = NULL;
}
static GtkPropertyMark
find_this_line_start_mark (GtkText* text, guint point_position, const GtkPropertyMark* near)
{
GtkPropertyMark mark;
mark = find_mark_near (text, point_position, near);
while (mark.index > 0 &&
GTK_TEXT_INDEX (text, mark.index - 1) != LINE_DELIM)
decrement_mark (&mark);
return mark;
}
static void
init_tab_cont (GtkText* text, PrevTabCont* tab_cont)
{
tab_cont->pixel_offset = 0;
tab_cont->tab_start.tab_stops = text->tab_stops;
tab_cont->tab_start.to_next_tab = (gulong) text->tab_stops->data;
if (!tab_cont->tab_start.to_next_tab)
tab_cont->tab_start.to_next_tab = text->default_tab_width;
}
static void
line_params_iterate (GtkText* text,
const GtkPropertyMark* mark0,
const PrevTabCont* tab_mark0,
gint8 alloc,
void* data,
LineIteratorFunction iter)
/* mark0 MUST be a real line start. if ALLOC, allocate line params
* from a mem chunk. DATA is passed to ITER_CALL, which is called
* for each line following MARK, iteration continues unless ITER_CALL
* returns TRUE. */
{
GtkPropertyMark mark = *mark0;
PrevTabCont tab_conts[2];
LineParams *lp, lpbuf;
gint tab_cont_index = 0;
if (tab_mark0)
tab_conts[0] = *tab_mark0;
else
init_tab_cont (text, tab_conts);
for (;;)
{
if (alloc)
lp = g_chunk_new (LineParams, params_mem_chunk);
else
lp = &lpbuf;
*lp = find_line_params (text, &mark, tab_conts + tab_cont_index,
tab_conts + (tab_cont_index + 1) % 2);
if ((*iter) (text, lp, data))
return;
if (LAST_INDEX (text, lp->end))
break;
mark = lp->end;
advance_mark (&mark);
tab_cont_index = (tab_cont_index + 1) % 2;
}
}
static gint
fetch_lines_iterator (GtkText* text, LineParams* lp, void* data)
{
FetchLinesData *fldata = (FetchLinesData*) data;
fldata->new_lines = g_list_prepend (fldata->new_lines, lp);
switch (fldata->fl_type)
{
case FetchLinesCount:
if (!text->line_wrap || !lp->wraps)
fldata->data += 1;
if (fldata->data >= fldata->data_max)
return TRUE;
break;
case FetchLinesPixels:
fldata->data += LINE_HEIGHT(*lp);
if (fldata->data >= fldata->data_max)
return TRUE;
break;
}
return FALSE;
}
static GList*
fetch_lines (GtkText* text,
const GtkPropertyMark* mark0,
const PrevTabCont* tab_cont0,
FLType fl_type,
gint data)
{
FetchLinesData fl_data;
fl_data.new_lines = NULL;
fl_data.data = 0;
fl_data.data_max = data;
fl_data.fl_type = fl_type;
line_params_iterate (text, mark0, tab_cont0, TRUE, &fl_data, fetch_lines_iterator);
return g_list_reverse (fl_data.new_lines);
}
static void
fetch_lines_backward (GtkText* text)
{
GList* new_lines = NULL, *new_line_start;
GtkPropertyMark mark = find_this_line_start_mark (text,
CACHE_DATA(text->line_start_cache).start.index - 1,
&CACHE_DATA(text->line_start_cache).start);
new_line_start = new_lines = fetch_lines (text, &mark, NULL, FetchLinesCount, 1);
while (new_line_start->next)
new_line_start = new_line_start->next;
new_line_start->next = text->line_start_cache;
text->line_start_cache->prev = new_line_start;
}
static void
fetch_lines_forward (GtkText* text, gint line_count)
{
GtkPropertyMark mark;
GList* line = text->line_start_cache;
while(line->next)
line = line->next;
mark = CACHE_DATA(line).end;
if (LAST_INDEX (text, mark))
return;
advance_mark(&mark);
line->next = fetch_lines (text, &mark, &CACHE_DATA(line).tab_cont_next, FetchLinesCount, line_count);
if (line->next)
line->next->prev = line;
}
/* Compute the number of lines, and vertical pixels for n characters
* starting from the point
*/
static void
compute_lines_pixels (GtkText* text, gint char_count,
guint *lines, guint *pixels)
{
GList *line = text->current_line;
*lines = 0;
*pixels = 0;
/* If char_count == 0, that means we're joining two lines in a
* deletion, so add in the values for the next line as well
*/
for (; line && char_count >= 0; line = line->next)
{
*pixels += LINE_HEIGHT(CACHE_DATA(line));
if (line == text->current_line)
char_count -= CACHE_DATA(line).end.index - text->point.index + 1;
else
char_count -= CACHE_DATA(line).end.index -CACHE_DATA(line).start.index + 1;
if (!text->line_wrap || !CACHE_DATA(line).wraps)
*lines += 1;
else
if (char_count < 0)
char_count = 0; /* force another loop */
if (!line->next)
fetch_lines_forward (text, 1);
}
}
static gint
total_line_height (GtkText* text, GList* line, gint line_count)
{
gint height = 0;
for (; line && line_count > 0; line = line->next)
{
height += LINE_HEIGHT(CACHE_DATA(line));
if (!text->line_wrap || !CACHE_DATA(line).wraps)
line_count -= 1;
if (!line->next)
fetch_lines_forward (text, line_count);
}
return height;
}
static void
swap_lines (GtkText* text, GList* old, GList* new, gint old_line_count)
{
if (old == text->line_start_cache)
{
GList* last;
for (; old_line_count > 0; old_line_count -= 1)
{
while (text->line_start_cache &&
text->line_wrap &&
CACHE_DATA(text->line_start_cache).wraps)
remove_cache_line(text, text->line_start_cache);
remove_cache_line(text, text->line_start_cache);
}
last = g_list_last (new);
last->next = text->line_start_cache;
if (text->line_start_cache)
text->line_start_cache->prev = last;
text->line_start_cache = new;
}
else
{
GList *last;
g_assert (old->prev);
last = old->prev;
for (; old_line_count > 0; old_line_count -= 1)
{
while (old && text->line_wrap && CACHE_DATA(old).wraps)
old = remove_cache_line (text, old);
old = remove_cache_line (text, old);
}
last->next = new;
new->prev = last;
last = g_list_last (new);
last->next = old;
if (old)
old->prev = last;
}
}
static void
correct_cache_delete (GtkText* text, gint nchars, gint lines)
{
GList* cache = text->current_line;
gint i;
for (i = 0; cache && i < lines; i += 1, cache = cache->next)
/* nothing */;
for (; cache; cache = cache->next)
{
GtkPropertyMark *start = &CACHE_DATA(cache).start;
GtkPropertyMark *end = &CACHE_DATA(cache).end;
start->index -= nchars;
end->index -= nchars;
if (start->property == text->point.property)
start->offset = start->index - (text->point.index - text->point.offset);
if (end->property == text->point.property)
end->offset = end->index - (text->point.index - text->point.offset);
/*TEXT_ASSERT_MARK(text, start, "start");*/
/*TEXT_ASSERT_MARK(text, end, "end");*/
}
}
static void
delete_expose (GtkText* text, gint nchars, guint old_lines, guint old_pixels)
{
gint pixel_height;
guint new_pixels = 0;
GdkRectangle rect;
GList* new_line = NULL;
gint width, height;
text->cursor_virtual_x = 0;
undraw_cursor (text, FALSE);
correct_cache_delete (text, nchars, old_lines);
pixel_height = pixel_height_of(text, text->current_line) -
LINE_HEIGHT(CACHE_DATA(text->current_line));
if (CACHE_DATA(text->current_line).start.index == text->point.index)
CACHE_DATA(text->current_line).start = text->point;
new_line = fetch_lines (text,
&CACHE_DATA(text->current_line).start,
&CACHE_DATA(text->current_line).tab_cont,
FetchLinesCount,
1);
swap_lines (text, text->current_line, new_line, old_lines);
text->current_line = new_line;
new_pixels = total_line_height (text, new_line, 1);
gdk_window_get_size (text->text_area, &width, &height);
if (old_pixels != new_pixels)
{
gdk_draw_pixmap (text->text_area,
text->gc,
text->text_area,
0,
pixel_height + old_pixels,
0,
pixel_height + new_pixels,
width,
height);
text->vadj->upper += new_pixels;
text->vadj->upper -= old_pixels;
adjust_adj (text, text->vadj);
}
rect.x = 0;
rect.y = pixel_height;
rect.width = width;
rect.height = new_pixels;
expose_text (text, &rect, FALSE);
gtk_text_draw_focus ( (GtkWidget *) text);
text->cursor_mark = text->point;
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
if (old_pixels != new_pixels)
process_exposes (text);
TEXT_ASSERT (text);
TEXT_SHOW(text);
}
/* note, the point has already been moved forward */
static void
correct_cache_insert (GtkText* text, gint nchars)
{
GList* cache = text->current_line->next;
for (; cache; cache = cache->next)
{
GtkPropertyMark *start = &CACHE_DATA(cache).start;
GtkPropertyMark *end = &CACHE_DATA(cache).end;
if (start->index >= text->point.index - nchars)
{
if (start->property == text->point.property)
move_mark_n(start, nchars);
else
start->index += nchars;
}
if (end->index >= text->point.index - nchars)
{
if (end->property == text->point.property)
move_mark_n(end, nchars);
else
end->index += nchars;
}
/*TEXT_ASSERT_MARK(text, start, "start");*/
/*TEXT_ASSERT_MARK(text, end, "end");*/
}
}
static void
insert_expose (GtkText* text, guint old_pixels, gint nchars,
guint new_line_count)
{
gint pixel_height;
guint new_pixels = 0;
GdkRectangle rect;
GList* new_lines = NULL;
gint width, height;
text->cursor_virtual_x = 0;
undraw_cursor (text, FALSE);
correct_cache_insert (text, nchars);
TEXT_SHOW_ADJ (text, text->vadj, "vadj");
pixel_height = pixel_height_of(text, text->current_line) -
LINE_HEIGHT(CACHE_DATA(text->current_line));
new_lines = fetch_lines (text,
&CACHE_DATA(text->current_line).start,
&CACHE_DATA(text->current_line).tab_cont,
FetchLinesCount,
new_line_count);
swap_lines (text, text->current_line, new_lines, 1);
text->current_line = new_lines;
new_pixels = total_line_height (text, new_lines, new_line_count);
gdk_window_get_size (text->text_area, &width, &height);
if (old_pixels != new_pixels)
{
gdk_draw_pixmap (text->text_area,
text->gc,
text->text_area,
0,
pixel_height + old_pixels,
0,
pixel_height + new_pixels,
width,
height + (old_pixels - new_pixels) - pixel_height);
text->vadj->upper += new_pixels;
text->vadj->upper -= old_pixels;
adjust_adj (text, text->vadj);
}
rect.x = 0;
rect.y = pixel_height;
rect.width = width;
rect.height = new_pixels;
expose_text (text, &rect, FALSE);
gtk_text_draw_focus ( (GtkWidget *) text);
text->cursor_mark = text->point;
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
if (old_pixels != new_pixels)
process_exposes (text);
TEXT_SHOW_ADJ (text, text->vadj, "vadj");
TEXT_ASSERT (text);
TEXT_SHOW(text);
}
static guint
font_hash (gpointer font)
{
return gdk_font_id ((GdkFont*) font);
}
static TextFont*
get_text_font (GdkFont* gfont)
{
static GHashTable *font_cache_table = NULL;
TextFont* tf;
gpointer lu;
gint i;
if (!font_cache_table)
font_cache_table = g_hash_table_new (font_hash, (GCompareFunc) gdk_font_equal);
lu = g_hash_table_lookup (font_cache_table, gfont);
if (lu)
return (TextFont*)lu;
tf = g_new (TextFont, 1);
tf->gdk_font = gfont;
for(i = 0; i < 256; i += 1)
tf->char_widths[i] = gdk_char_width (gfont, (char)i);
g_hash_table_insert (font_cache_table, gfont, tf);
return tf;
}
static gint
text_properties_equal (TextProperty* prop, GdkFont* font, GdkColor *fore, GdkColor *back)
{
return prop->font == get_text_font(font) &&
gdk_color_equal(&prop->fore_color, fore) &&
gdk_color_equal(&prop->back_color, back);
}
static TextProperty*
new_text_property (GdkFont* font, GdkColor* fore, GdkColor* back, guint length)
{
TextProperty *prop;
if (text_property_chunk == NULL)
{
text_property_chunk = g_mem_chunk_new ("text property mem chunk",
sizeof(TextProperty),
1024*sizeof(TextProperty),
G_ALLOC_ONLY);
}
prop = g_chunk_new(TextProperty, text_property_chunk);
prop->font = get_text_font (font);
prop->fore_color = *fore;
if (back)
prop->back_color = *back;
prop->length = length;
return prop;
}
/* Flop the memory between the point and the gap around like a
* dead fish. */
static void
move_gap_to_point (GtkText* text)
{
if (text->gap_position < text->point.index)
{
gint diff = text->point.index - text->gap_position;
g_memmove (text->text + text->gap_position,
text->text + text->gap_position + text->gap_size,
diff);
text->gap_position = text->point.index;
}
else if (text->gap_position > text->point.index)
{
gint diff = text->gap_position - text->point.index;
g_memmove (text->text + text->point.index + text->gap_size,
text->text + text->point.index,
diff);
text->gap_position = text->point.index;
}
}
/* Increase the gap size. */
static void
make_forward_space (GtkText* text, guint len)
{
if (text->gap_size < len)
{
guint sum = MAX(2*len, MIN_GAP_SIZE) + text->text_end;
if (sum >= text->text_len)
{
guint i = 1;
while (i <= sum) i <<= 1;
text->text = (guchar*)g_realloc(text->text, i);
}
g_memmove (text->text + text->gap_position + text->gap_size + 2*len,
text->text + text->gap_position + text->gap_size,
text->text_end - (text->gap_position + text->gap_size));
text->text_end += len*2;
text->gap_size += len*2;
}
}
/* Inserts into the text property list a list element that guarantees
* that for len characters following the point, text has the correct
* property. does not move point. adjusts text_properties_point and
* text_properties_point_offset relative to the current value of
* point. */
static void
insert_text_property (GtkText* text, GdkFont* font,
GdkColor *fore, GdkColor* back, guint len)
{
GtkPropertyMark *mark = &text->point;
TextProperty* forward_prop = MARK_CURRENT_PROPERTY(mark);
TextProperty* backward_prop = MARK_PREV_PROPERTY(mark);
if (MARK_OFFSET(mark) == 0)
{
/* Point is on the boundary of two properties.
* If it is the same as either, grow, else insert
* a new one. */
if (text_properties_equal(forward_prop, font, fore, back))
{
/* Grow the property in front of us. */
MARK_PROPERTY_LENGTH(mark) += len;
}
else if (backward_prop &&
text_properties_equal(backward_prop, font, fore, back))
{
/* Grow property behind us, point property and offset
* change. */
SET_PROPERTY_MARK (&text->point,
MARK_PREV_LIST_PTR (mark),
backward_prop->length);
backward_prop->length += len;
}
else
{
/* Splice a new property into the list. */
GList* new_prop = g_list_alloc();
new_prop->next = MARK_LIST_PTR(mark);
new_prop->prev = MARK_PREV_LIST_PTR(mark);
new_prop->next->prev = new_prop;
if (new_prop->prev)
new_prop->prev->next = new_prop;
new_prop->data = new_text_property (font, fore, back, len);
SET_PROPERTY_MARK (mark, new_prop, 0);
}
}
else
{
/* In the middle of forward_prop, if properties are equal,
* just add to its length, else split it into two and splice
* in a new one. */
if (text_properties_equal (forward_prop, font, fore, back))
{
forward_prop->length += len;
}
else
{
GList* new_prop = g_list_alloc();
GList* new_prop_forward = g_list_alloc();
gint old_length = forward_prop->length;
GList* next = MARK_NEXT_LIST_PTR(mark);
/* Set the new lengths according to where they are split. Construct
* two new properties. */
forward_prop->length = MARK_OFFSET(mark);
new_prop_forward->data = new_text_property(forward_prop->font->gdk_font,
&forward_prop->fore_color,
&forward_prop->back_color,
old_length - forward_prop->length);
new_prop->data = new_text_property(font, fore, back, len);
/* Now splice things in. */
MARK_NEXT_LIST_PTR(mark) = new_prop;
new_prop->prev = MARK_LIST_PTR(mark);
new_prop->next = new_prop_forward;
new_prop_forward->prev = new_prop;
new_prop_forward->next = next;
if (next)
next->prev = new_prop_forward;
SET_PROPERTY_MARK (mark, new_prop, 0);
}
}
while (text->text_properties_end->next)
text->text_properties_end = text->text_properties_end->next;
while (text->text_properties->prev)
text->text_properties = text->text_properties->prev;
}
static void
delete_text_property (GtkText* text, guint nchars)
{
/* Delete nchars forward from point. */
TextProperty *prop;
GList *tmp;
gint is_first;
for(; nchars; nchars -= 1)
{
prop = MARK_CURRENT_PROPERTY(&text->point);
prop->length -= 1;
if (prop->length == 0)
{
tmp = MARK_LIST_PTR (&text->point);
is_first = tmp == text->text_properties;
MARK_LIST_PTR (&text->point) = g_list_remove_link (tmp, tmp);
text->point.offset = 0;
g_mem_chunk_free (text_property_chunk, prop);
prop = MARK_CURRENT_PROPERTY (&text->point);
if (is_first)
text->text_properties = MARK_LIST_PTR (&text->point);
g_assert (prop->length != 0);
}
else if (prop->length == text->point.offset)
{
MARK_LIST_PTR (&text->point) = MARK_NEXT_LIST_PTR (&text->point);
text->point.offset = 0;
}
}
}
static void
init_properties (GtkText *text)
{
GtkWidget *widget = (GtkWidget *)text;
if (!text->text_properties)
{
text->text_properties = g_list_alloc();
text->text_properties->next = NULL;
text->text_properties->prev = NULL;
text->text_properties->data = new_text_property (widget->style->font,
&widget->style->text[GTK_STATE_NORMAL],
&widget->style->base[GTK_STATE_NORMAL],
1);
text->text_properties_end = text->text_properties;
SET_PROPERTY_MARK (&text->point, text->text_properties, 0);
text->point.index = 0;
}
}
/**********************************************************************/
/* Property Movement */
/**********************************************************************/
static void
move_mark_n (GtkPropertyMark* mark, gint n)
{
if (n > 0)
advance_mark_n(mark, n);
else if (n < 0)
decrement_mark_n(mark, -n);
}
static void
advance_mark_n (GtkPropertyMark* mark, gint n)
{
gint i;
g_assert (n > 0);
for (i = 0; i < n; i += 1)
advance_mark (mark);
}
static void
advance_mark (GtkPropertyMark* mark)
{
TextProperty* prop = MARK_CURRENT_PROPERTY (mark);
mark->index += 1;
if (prop->length > mark->offset + 1)
mark->offset += 1;
else
{
mark->property = MARK_NEXT_LIST_PTR (mark);
mark->offset = 0;
}
}
static void
decrement_mark (GtkPropertyMark* mark)
{
mark->index -= 1;
if (mark->offset > 0)
mark->offset -= 1;
else
{
mark->property = MARK_PREV_LIST_PTR (mark);
mark->offset = MARK_CURRENT_PROPERTY (mark)->length - 1;
}
}
static void
decrement_mark_n (GtkPropertyMark* mark, gint n)
{
gint i;
g_assert (n > 0);
for (i = 0; i < n; i += 1)
decrement_mark (mark);
}
static GtkPropertyMark
find_mark (GtkText* text, guint mark_position)
{
return find_mark_near (text, mark_position, &text->point);
}
/* This can be optimized in two ways.
* First, advances can be made in units of the current TextProperty
* length, when possible. This will reduce computation and function
* call overhead.
*
* You can also start from the end, what a drag.
*/
static GtkPropertyMark
find_mark_near (GtkText* text, guint mark_position, const GtkPropertyMark* near)
{
gint diffa;
gint diffb;
GtkPropertyMark mark;
if (!near)
diffa = mark_position + 1;
else
diffa = mark_position - near->index;
diffb = mark_position;
if (diffa < 0)
diffa = -diffa;
if (diffa <= diffb)
{
mark = *near;
}
else
{
mark.index = 0;
mark.property = text->text_properties;
mark.offset = 0;
}
if (mark.index > mark_position)
{
while (mark.index > mark_position)
decrement_mark (&mark);
}
else
{
while (mark_position > mark.index)
advance_mark (&mark);
}
return mark;
}
/* This routine must be called with scroll == FALSE, only when
* point is at least partially on screen
*/
static void
find_line_containing_point (GtkText* text, guint point,
gboolean scroll)
{
GList* cache;
gint height;
text->current_line = NULL;
if (!text->line_start_cache->next)
{
/* @@@ Its visible, right? */
text->current_line = text->line_start_cache;
return;
}
while ( ( scroll && (text->first_cut_pixels != 0) &&
(CACHE_DATA(text->line_start_cache->next).start.index > point) ) ||
( (text->first_cut_pixels == 0) &&
(CACHE_DATA(text->line_start_cache).start.index > point) ) )
{
scroll_int (text, - SCROLL_PIXELS);
g_assert (text->line_start_cache->next);
}
TEXT_SHOW (text);
gdk_window_get_size (text->text_area, NULL, &height);
for (cache = text->line_start_cache; cache; cache = cache->next)
{
guint lph;
if (CACHE_DATA(cache).end.index >= point ||
LAST_INDEX(text, CACHE_DATA(cache).end))
{
text->current_line = cache; /* LOOK HERE, this proc has an
* important side effect. */
return;
}
TEXT_SHOW_LINE (text, cache, "cache");
if (cache->next == NULL)
fetch_lines_forward (text, 1);
if (scroll)
{
lph = pixel_height_of (text, cache->next);
while (lph > height || lph == 0)
{
TEXT_SHOW_LINE (text, cache, "cache");
TEXT_SHOW_LINE (text, cache->next, "cache->next");
scroll_int (text, LINE_HEIGHT(CACHE_DATA(cache->next)));
lph = pixel_height_of (text, cache->next);
}
}
}
g_assert_not_reached (); /* Must set text->current_line here */
}
static guint
pixel_height_of (GtkText* text, GList* cache_line)
{
gint pixels = - text->first_cut_pixels;
GList *cache = text->line_start_cache;
while (TRUE) {
pixels += LINE_HEIGHT (CACHE_DATA(cache));
if (cache->data == cache_line->data)
break;
cache = cache->next;
}
return pixels;
}
/**********************************************************************/
/* Search and Placement */
/**********************************************************************/
static gint
find_char_width (GtkText* text, const GtkPropertyMark *mark, const TabStopMark *tab_mark)
{
gchar ch = GTK_TEXT_INDEX (text, mark->index);
gint16* char_widths = MARK_CURRENT_TEXT_FONT (mark)->char_widths;
if (ch == '\t')
{
return tab_mark->to_next_tab * char_widths[' '];
}
else
{
return char_widths[ch & 0xff];
}
}
static void
advance_tab_mark (GtkText* text, TabStopMark* tab_mark, gchar ch)
{
if (tab_mark->to_next_tab == 1 || ch == '\t')
{
if (tab_mark->tab_stops->next)
{
tab_mark->tab_stops = tab_mark->tab_stops->next;
tab_mark->to_next_tab = (gulong) tab_mark->tab_stops->data;
}
else
{
tab_mark->to_next_tab = text->default_tab_width;
}
}
else
{
tab_mark->to_next_tab -= 1;
}
}
static void
advance_tab_mark_n (GtkText* text, TabStopMark* tab_mark, gint n)
/* No tabs! */
{
while (n--)
advance_tab_mark (text, tab_mark, 0);
}
static void
find_cursor_at_line (GtkText* text, const LineParams* start_line, gint pixel_height)
{
gchar ch;
GtkEditable *editable = (GtkEditable *)text;
GtkPropertyMark mark = start_line->start;
TabStopMark tab_mark = start_line->tab_cont.tab_start;
gint pixel_width = LINE_START_PIXEL (*start_line);
while (mark.index < text->cursor_mark.index)
{
pixel_width += find_char_width (text, &mark, &tab_mark);
advance_tab_mark (text, &tab_mark, GTK_TEXT_INDEX(text, mark.index));
advance_mark (&mark);
}
text->cursor_pos_x = pixel_width;
text->cursor_pos_y = pixel_height;
text->cursor_char_offset = start_line->font_descent;
text->cursor_mark = mark;
ch = GTK_TEXT_INDEX (text, mark.index);
if (!isspace(ch))
text->cursor_char = ch;
else
text->cursor_char = 0;
#ifdef USE_XIM
if (gdk_im_ready() && editable->ic &&
gdk_ic_get_style (editable->ic) & GdkIMPreeditPosition)
{
GdkPoint spot;
spot.x = text->cursor_pos_x;
spot.y = text->cursor_pos_y - text->cursor_char_offset;
if (MARK_CURRENT_FONT (&mark)->type == GDK_FONT_FONTSET)
gdk_ic_set_attr (editable->ic, "preeditAttributes",
"fontSet", GDK_FONT_XFONT (MARK_CURRENT_FONT (&mark)),
NULL);
gdk_ic_set_attr (editable->ic, "preeditAttributes",
"spotLocation", &spot,
"lineSpace", LINE_HEIGHT (*start_line),
"foreground", MARK_CURRENT_FORE (&mark)->pixel,
"background", MARK_CURRENT_BACK (&mark)->pixel,
NULL);
}
#endif
}
static void
find_cursor (GtkText* text, gboolean scroll)
{
if (!text->has_cursor)
return;
find_line_containing_point (text, text->cursor_mark.index, scroll);
g_assert (text->cursor_mark.index >= text->first_line_start_index);
if (text->current_line)
find_cursor_at_line (text,
&CACHE_DATA(text->current_line),
pixel_height_of(text, text->current_line));
GTK_EDITABLE (text)->current_pos = text->cursor_mark.index;
}
static void
find_mouse_cursor_at_line (GtkText *text, const LineParams* lp,
guint line_pixel_height,
gint button_x)
{
GtkPropertyMark mark = lp->start;
TabStopMark tab_mark = lp->tab_cont.tab_start;
gint char_width = find_char_width(text, &mark, &tab_mark);
gint pixel_width = LINE_START_PIXEL (*lp) + (char_width+1)/2;
text->cursor_pos_y = line_pixel_height;
for (;;)
{
gchar ch = GTK_TEXT_INDEX (text, mark.index);
if (button_x < pixel_width || mark.index == lp->end.index)
{
text->cursor_pos_x = pixel_width - (char_width+1)/2;
text->cursor_mark = mark;
text->cursor_char_offset = lp->font_descent;
if (!isspace(ch))
text->cursor_char = ch;
else
text->cursor_char = 0;
break;
}
advance_tab_mark (text, &tab_mark, ch);
advance_mark (&mark);
pixel_width += char_width/2;
char_width = find_char_width (text, &mark, &tab_mark);
pixel_width += (char_width+1)/2;
}
}
static void
find_mouse_cursor (GtkText* text, gint x, gint y)
{
gint pixel_height;
GList* cache = text->line_start_cache;
g_assert (cache);
pixel_height = - text->first_cut_pixels;
text->has_cursor = 1;
for (; cache; cache = cache->next)
{
pixel_height += LINE_HEIGHT(CACHE_DATA(cache));
if (y < pixel_height || !cache->next)
{
find_mouse_cursor_at_line (text, &CACHE_DATA(cache), pixel_height, x);
find_cursor (text, FALSE);
return;
}
}
}
/**********************************************************************/
/* Cache Manager */
/**********************************************************************/
static void
free_cache (GtkText* text)
{
GList* cache = text->line_start_cache;
for (; cache; cache = cache->next)
g_mem_chunk_free (params_mem_chunk, cache->data);
g_list_free (text->line_start_cache);
text->line_start_cache = NULL;
}
static GList*
remove_cache_line (GtkText* text, GList* member)
{
if (member == text->line_start_cache)
{
if (text->line_start_cache)
text->line_start_cache = text->line_start_cache->next;
return text->line_start_cache;
}
else
{
GList *list = member->prev;
list->next = list->next->next;
if (list->next)
list->next->prev = list;
member->next = NULL;
g_mem_chunk_free (params_mem_chunk, member->data);
g_list_free (member);
return list->next;
}
}
/**********************************************************************/
/* Key Motion */
/**********************************************************************/
static void
move_cursor_buffer_ver (GtkText *text, int dir)
{
if (dir > 0)
scroll_int (text, text->vadj->upper);
else
scroll_int (text, - text->vadj->value);
}
static void
move_cursor_page_ver (GtkText *text, int dir)
{
scroll_int (text, dir * text->vadj->page_increment);
}
static void
move_cursor_ver (GtkText *text, int count)
{
gint i;
GtkPropertyMark mark;
gint offset;
if (!text->has_cursor)
{
scroll_int (text, count * KEY_SCROLL_PIXELS);
return;
}
mark = find_this_line_start_mark (text, text->cursor_mark.index, &text->cursor_mark);
offset = text->cursor_mark.index - mark.index;
if (offset > text->cursor_virtual_x)
text->cursor_virtual_x = offset;
if (count < 0)
{
if (mark.index == 0)
return;
decrement_mark (&mark);
mark = find_this_line_start_mark (text, mark.index, &mark);
}
else
{
mark = text->cursor_mark;
while (!LAST_INDEX(text, mark) && GTK_TEXT_INDEX(text, mark.index) != LINE_DELIM)
advance_mark (&mark);
if (LAST_INDEX(text, mark))
return;
advance_mark (&mark);
}
for (i=0; i < text->cursor_virtual_x; i += 1, advance_mark(&mark))
if (LAST_INDEX(text, mark) || GTK_TEXT_INDEX(text, mark.index) == LINE_DELIM)
break;
undraw_cursor (text, FALSE);
text->cursor_mark = mark;
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
}
static void
move_cursor_hor (GtkText *text, int count)
{
/* count should be +-1. */
if (!text->has_cursor)
return;
if ( (count > 0 && text->cursor_mark.index + count > TEXT_LENGTH(text)) ||
(count < 0 && text->cursor_mark.index < (- count)) ||
(count == 0) )
return;
text->cursor_virtual_x = 0;
undraw_cursor (text, FALSE);
move_mark_n (&text->cursor_mark, count);
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
}
static void
gtk_text_move_forward_character (GtkText *text)
{
move_cursor_hor (text, 1);
}
static void
gtk_text_move_backward_character (GtkText *text)
{
move_cursor_hor (text, -1);
}
static void
gtk_text_move_forward_word (GtkText *text)
{
undraw_cursor (text, FALSE);
while (!LAST_INDEX (text, text->cursor_mark) &&
!isalnum (GTK_TEXT_INDEX(text, text->cursor_mark.index)))
advance_mark (&text->cursor_mark);
while (!LAST_INDEX (text, text->cursor_mark) &&
isalnum (GTK_TEXT_INDEX(text, text->cursor_mark.index)))
advance_mark (&text->cursor_mark);
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
}
static void
gtk_text_move_backward_word (GtkText *text)
{
undraw_cursor (text, FALSE);
while ((text->cursor_mark.index > 0) &&
!isalnum (GTK_TEXT_INDEX(text, text->cursor_mark.index-1)))
decrement_mark (&text->cursor_mark);
while ((text->cursor_mark.index > 0) &&
isalnum (GTK_TEXT_INDEX(text, text->cursor_mark.index-1)))
decrement_mark (&text->cursor_mark);
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
}
static void
gtk_text_move_beginning_of_line (GtkText *text)
{
undraw_cursor (text, FALSE);
text->cursor_mark = CACHE_DATA(text->current_line).start;
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
}
static void
gtk_text_move_end_of_line (GtkText *text)
{
undraw_cursor (text, FALSE);
text->cursor_mark = CACHE_DATA(text->current_line).end;
find_cursor (text, TRUE);
draw_cursor (text, FALSE);
}
static void
gtk_text_delete_forward_character (GtkText *text)
{
GtkEditable *editable;
editable = GTK_EDITABLE (text);
if (editable->selection_start_pos != editable->selection_end_pos)
gtk_editable_delete_selection (editable);
else
{
gtk_text_forward_delete (text, 1);
gtk_editable_changed (editable);
}
}
static void
gtk_text_delete_backward_character (GtkText *text)
{
GtkEditable *editable;
editable = GTK_EDITABLE (text);
if (editable->selection_start_pos != editable->selection_end_pos)
gtk_editable_delete_selection (editable);
else
{
gtk_text_backward_delete (text, 1);
gtk_editable_changed (editable);
}
}
static void
gtk_text_delete_forward_word (GtkText *text)
{
guint old_pos;
GtkEditable *editable;
editable = GTK_EDITABLE (text);
if (editable->selection_start_pos != editable->selection_end_pos)
gtk_editable_delete_selection (editable);
else
{
old_pos = text->cursor_mark.index;
gtk_text_move_forward_word (text);
gtk_text_backward_delete (text, old_pos - text->cursor_mark.index);
gtk_editable_changed (editable);
}
}
static void
gtk_text_delete_backward_word (GtkText *text)
{
gint old_pos;
GtkEditable *editable;
editable = GTK_EDITABLE (text);
if (editable->selection_start_pos != editable->selection_end_pos)
gtk_editable_delete_selection (editable);
else
{
old_pos = text->point.index;
gtk_text_move_backward_word (text);
gtk_text_forward_delete (text, text->point.index - old_pos);
gtk_editable_changed (editable);
}
}
static void
gtk_text_delete_line (GtkText *text)
{
gtk_text_set_point (text, CACHE_DATA(text->current_line).start.index);
gtk_text_forward_delete (text,
CACHE_DATA(text->current_line).end.index -
CACHE_DATA(text->current_line).start.index + 1);
gtk_editable_changed (GTK_EDITABLE (text));
}
static void
gtk_text_delete_to_line_end (GtkText *text)
{
gtk_text_forward_delete (text,
MAX(CACHE_DATA(text->current_line).end.index -
text->point.index, 1));
gtk_editable_changed (GTK_EDITABLE (text));
}
static void
gtk_text_select_word (GtkText *text)
{
gint start_pos;
gint end_pos;
GtkEditable *editable;
editable = GTK_EDITABLE (text);
gtk_text_move_backward_word (text);
start_pos = text->cursor_mark.index;
gtk_text_move_forward_word (text);
end_pos = text->cursor_mark.index;
gtk_text_set_selection (editable, start_pos, end_pos);
}
static void
gtk_text_select_line (GtkText *text)
{
gtk_text_set_selection (GTK_EDITABLE (text),
CACHE_DATA(text->current_line).end.index,
CACHE_DATA(text->current_line).start.index);
}
/**********************************************************************/
/* Scrolling */
/**********************************************************************/
static void
adjust_adj (GtkText* text, GtkAdjustment* adj)
{
gint height;
gdk_window_get_size (text->text_area, NULL, &height);
adj->step_increment = MIN (adj->upper, (float) SCROLL_PIXELS);
adj->page_increment = MIN (adj->upper, height - (float) KEY_SCROLL_PIXELS);
adj->page_size = MIN (adj->upper, height);
adj->value = MIN (adj->value, adj->upper - adj->page_size);
adj->value = MAX (adj->value, 0.0);
gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
}
static gint
set_vertical_scroll_iterator (GtkText* text, LineParams* lp, void* data)
{
gint *pixel_count = (gint*) data;
if (text->first_line_start_index == lp->start.index)
text->vadj->value = (float) *pixel_count;
*pixel_count += LINE_HEIGHT (*lp);
return FALSE;
}
static gint
set_vertical_scroll_find_iterator (GtkText* text, LineParams* lp, void* data)
{
SetVerticalScrollData *svdata = (SetVerticalScrollData *) data;
gint return_val;
if (svdata->last_didnt_wrap)
svdata->last_line_start = lp->start.index;
if (svdata->pixel_height <= (gint) text->vadj->value &&
svdata->pixel_height + LINE_HEIGHT(*lp) > (gint) text->vadj->value)
{
svdata->mark = lp->start;
text->first_cut_pixels = (gint)text->vadj->value - svdata->pixel_height;
text->first_onscreen_ver_pixel = svdata->pixel_height;
text->first_line_start_index = svdata->last_line_start;
return_val = TRUE;
}
else
{
svdata->pixel_height += LINE_HEIGHT (*lp);
return_val = FALSE;
}
if (!lp->wraps)
svdata->last_didnt_wrap = TRUE;
else
svdata->last_didnt_wrap = FALSE;
return return_val;
}
static GtkPropertyMark
set_vertical_scroll (GtkText* text)
{
GtkPropertyMark mark = find_mark (text, 0);
SetVerticalScrollData data;
gint height;
gint pixel_count = 0;
gint orig_value;
line_params_iterate (text, &mark, NULL, FALSE, &pixel_count, set_vertical_scroll_iterator);
text->vadj->upper = (float) pixel_count;
orig_value = (gint) text->vadj->value;
gdk_window_get_size (text->text_area, NULL, &height);
text->vadj->step_increment = MIN (text->vadj->upper, (float) SCROLL_PIXELS);
text->vadj->page_increment = MIN (text->vadj->upper, height - (float) KEY_SCROLL_PIXELS);
text->vadj->page_size = MIN (text->vadj->upper, height);
text->vadj->value = MIN (text->vadj->value, text->vadj->upper - text->vadj->page_size);
text->vadj->value = MAX (text->vadj->value, 0.0);
text->last_ver_value = (gint)text->vadj->value;
text->first_cut_pixels = 0;
gtk_signal_emit_by_name (GTK_OBJECT (text->vadj), "changed");
if (text->vadj->value != orig_value)
{
/* We got clipped, and don't really know which line to put first. */
data.pixel_height = 0;
data.last_didnt_wrap = TRUE;
line_params_iterate (text, &mark, NULL,
FALSE, &data,
set_vertical_scroll_find_iterator);
return data.mark;
}
else
{
return find_mark (text, text->first_line_start_index);
}
}
static void
scroll_int (GtkText* text, gint diff)
{
gfloat upper;
text->vadj->value += diff;
upper = text->vadj->upper - text->vadj->page_size;
text->vadj->value = MIN (text->vadj->value, upper);
text->vadj->value = MAX (text->vadj->value, 0.0);
gtk_signal_emit_by_name (GTK_OBJECT (text->vadj), "value_changed");
}
static void
process_exposes (GtkText *text)
{
GdkEvent *event;
/* Make sure graphics expose events are processed before scrolling
* again */
while ((event = gdk_event_get_graphics_expose (text->text_area)) != NULL)
{
gtk_widget_event (GTK_WIDGET (text), event);
if (event->expose.count == 0)
{
gdk_event_free (event);
break;
}
gdk_event_free (event);
}
}
static gint last_visible_line_height (GtkText* text)
{
GList *cache = text->line_start_cache;
gint height;
gdk_window_get_size (text->text_area, NULL, &height);
for (; cache->next; cache = cache->next)
if (pixel_height_of(text, cache->next) > height)
break;
if (cache)
return pixel_height_of(text, cache) - 1;
else
return 0;
}
static gint first_visible_line_height (GtkText* text)
{
if (text->first_cut_pixels)
return pixel_height_of(text, text->line_start_cache) + 1;
else
return 1;
}
static void
scroll_down (GtkText* text, gint diff0)
{
GdkRectangle rect;
gint real_diff = 0;
gint width, height;
text->first_onscreen_ver_pixel += diff0;
while (diff0-- > 0)
{
g_assert (text->line_start_cache &&
text->line_start_cache->next);
if (text->first_cut_pixels < LINE_HEIGHT(CACHE_DATA(text->line_start_cache)) - 1)
{
text->first_cut_pixels += 1;
}
else
{
text->first_cut_pixels = 0;
text->line_start_cache = text->line_start_cache->next;
text->first_line_start_index =
CACHE_DATA(text->line_start_cache).start.index;
if (!text->line_start_cache->next)
fetch_lines_forward (text, 1);
}
real_diff += 1;
}
gdk_window_get_size (text->text_area, &width, &height);
if (height > real_diff)
gdk_draw_pixmap (text->text_area,
text->gc,
text->text_area,
0,
real_diff,
0,
0,
width,
height - real_diff);
rect.x = 0;
rect.y = MAX (0, height - real_diff);
rect.width = width;
rect.height = MIN (height, real_diff);
expose_text (text, &rect, FALSE);
gtk_text_draw_focus ( (GtkWidget *) text);
if (text->current_line)
{
gint cursor_min;
text->cursor_pos_y -= real_diff;
cursor_min = drawn_cursor_min(text);
if (cursor_min < 0)
find_mouse_cursor (text, text->cursor_pos_x,
first_visible_line_height (text));
}
if (height > real_diff)
process_exposes (text);
}
static void
scroll_up (GtkText* text, gint diff0)
{
gint real_diff = 0;
GdkRectangle rect;
gint width, height;
text->first_onscreen_ver_pixel += diff0;
while (diff0++ < 0)
{
g_assert (text->line_start_cache);
if (text->first_cut_pixels > 0)
{
text->first_cut_pixels -= 1;
}
else
{
if (!text->line_start_cache->prev)
fetch_lines_backward (text);
text->line_start_cache = text->line_start_cache->prev;
text->first_line_start_index =
CACHE_DATA(text->line_start_cache).start.index;
text->first_cut_pixels = LINE_HEIGHT(CACHE_DATA(text->line_start_cache)) - 1;
}
real_diff += 1;
}
gdk_window_get_size (text->text_area, &width, &height);
if (height > real_diff)
gdk_draw_pixmap (text->text_area,
text->gc,
text->text_area,
0,
0,
0,
real_diff,
width,
height - real_diff);
rect.x = 0;
rect.y = 0;
rect.width = width;
rect.height = MIN (height, real_diff);
expose_text (text, &rect, FALSE);
gtk_text_draw_focus ( (GtkWidget *) text);
if (text->current_line)
{
gint cursor_max;
gint height;
text->cursor_pos_y += real_diff;
cursor_max = drawn_cursor_max(text);
gdk_window_get_size (text->text_area, NULL, &height);
if (cursor_max >= height)
find_mouse_cursor (text, text->cursor_pos_x,
last_visible_line_height (text));
}
if (height > real_diff)
process_exposes (text);
}
/**********************************************************************/
/* Display Code */
/**********************************************************************/
/* Assumes mark starts a line. Calculates the height, width, and
* displayable character count of a single DISPLAYABLE line. That
* means that in line-wrap mode, this does may not compute the
* properties of an entire line. */
static LineParams
find_line_params (GtkText* text,
const GtkPropertyMark* mark,
const PrevTabCont *tab_cont,
PrevTabCont *next_cont)
{
LineParams lp;
TabStopMark tab_mark = tab_cont->tab_start;
guint max_display_pixels;
gchar ch;
gint ch_width;
GdkFont *font;
gdk_window_get_size (text->text_area, (gint*) &max_display_pixels, NULL);
max_display_pixels -= LINE_WRAP_ROOM;
lp.wraps = 0;
lp.tab_cont = *tab_cont;
lp.start = *mark;
lp.end = *mark;
lp.pixel_width = tab_cont->pixel_offset;
lp.displayable_chars = 0;
lp.font_ascent = 0;
lp.font_descent = 0;
init_tab_cont (text, next_cont);
while (!LAST_INDEX(text, lp.end))
{
g_assert (lp.end.property);
ch = GTK_TEXT_INDEX (text, lp.end.index);
font = MARK_CURRENT_FONT (&lp.end);
if (ch == LINE_DELIM)
{
/* Newline doesn't count in computation of line height, even
* if its in a bigger font than the rest of the line. Unless,
* of course, there are no other characters. */
if (!lp.font_ascent && !lp.font_descent)
{
lp.font_ascent = font->ascent;
lp.font_descent = font->descent;
}
lp.tab_cont_next = *next_cont;
return lp;
}
ch_width = find_char_width (text, &lp.end, &tab_mark);
if (ch_width + lp.pixel_width > max_display_pixels)
{
lp.wraps = 1;
if (text->line_wrap)
{
next_cont->tab_start = tab_mark;
next_cont->pixel_offset = 0;
if (ch == '\t')
{
/* Here's the tough case, a tab is wrapping. */
gint pixels_avail = max_display_pixels - lp.pixel_width;
gint space_width = MARK_CURRENT_TEXT_FONT(&lp.end)->char_widths[' '];
gint spaces_avail = pixels_avail / space_width;
if (spaces_avail == 0)
{
decrement_mark (&lp.end);
}
else
{
advance_tab_mark (text, &next_cont->tab_start, '\t');
next_cont->pixel_offset = space_width * (tab_mark.to_next_tab -
spaces_avail);
lp.displayable_chars += 1;
}
}
else
{
/* Don't include this character, it will wrap. */
decrement_mark (&lp.end);
}
lp.tab_cont_next = *next_cont;
return lp;
}
}
else
{
lp.displayable_chars += 1;
}
lp.font_ascent = MAX (font->ascent, lp.font_ascent);
lp.font_descent = MAX (font->descent, lp.font_descent);
lp.pixel_width += ch_width;
advance_mark(&lp.end);
advance_tab_mark (text, &tab_mark, ch);
}
if (LAST_INDEX(text, lp.start))
{
/* Special case, empty last line. */
font = MARK_CURRENT_FONT (&lp.end);
lp.font_ascent = font->ascent;
lp.font_descent = font->descent;
}
lp.tab_cont_next = *next_cont;
return lp;
}
static void
expand_scratch_buffer (GtkText* text, guint len)
{
if (len >= text->scratch_buffer_len)
{
guint i = 1;
while (i <= len && i < MIN_GAP_SIZE) i <<= 1;
if (text->scratch_buffer)
text->scratch_buffer = g_new (guchar, i);
else
text->scratch_buffer = g_realloc (text->scratch_buffer, i);
text->scratch_buffer_len = i;
}
}
/* Returns a GC to draw a background for the text at a mark,
* or NULL, if the mark's background is NULL
*
* Side effect: modifies text->gc
*/
static GdkGC *
mark_bg_gc (GtkText* text, const GtkPropertyMark *mark)
{
GtkEditable *editable = GTK_EDITABLE(text);
if ((mark->index >= MIN(editable->selection_start_pos, editable->selection_end_pos) &&
mark->index < MAX(editable->selection_start_pos, editable->selection_end_pos)))
{
if (editable->has_selection)
return GTK_WIDGET(text)->style->bg_gc[GTK_STATE_SELECTED];
else
return GTK_WIDGET(text)->style->bg_gc[GTK_STATE_ACTIVE];
}
else if (!gdk_color_equal(MARK_CURRENT_BACK (mark),
&GTK_WIDGET(text)->style->base[GTK_STATE_NORMAL]))
{
gdk_gc_set_foreground (text->gc, MARK_CURRENT_BACK (mark));
return text->gc;
}
return NULL;
}
static void
draw_line (GtkText* text,
gint pixel_start_height,
LineParams* lp)
{
GdkGCValues gc_values;
gint i;
gint len = 0;
guint running_offset = lp->tab_cont.pixel_offset;
guchar* buffer;
GdkGC *fg_gc, *bg_gc;
GtkEditable *editable = GTK_EDITABLE(text);
guint selection_start_pos = MIN (editable->selection_start_pos, editable->selection_end_pos);
guint selection_end_pos = MAX (editable->selection_start_pos, editable->selection_end_pos);
GtkPropertyMark mark = lp->start;
TabStopMark tab_mark = lp->tab_cont.tab_start;
gint pixel_height = pixel_start_height + lp->font_ascent;
guint chars = lp->displayable_chars;
/* First provide a contiguous segment of memory. This makes reading
* the code below *much* easier, and only incurs the cost of copying
* when the line being displayed spans the gap. */
if (mark.index <= text->gap_position &&
mark.index + chars > text->gap_position)
{
expand_scratch_buffer (text, chars);
for (i = 0; i < chars; i += 1)
text->scratch_buffer[i] = GTK_TEXT_INDEX(text, mark.index + i);
buffer = text->scratch_buffer;
}
else
{
if (mark.index >= text->gap_position)
buffer = text->text + mark.index + text->gap_size;
else
buffer = text->text + mark.index;
}
if (running_offset > 0)
{
bg_gc = mark_bg_gc (text, &mark);
if (bg_gc)
gdk_draw_rectangle (text->text_area,
bg_gc,
TRUE,
0,
pixel_start_height,
running_offset,
LINE_HEIGHT (*lp));
else if (!editable->editable &&
GTK_WIDGET (text)->style->bg_pixmap[GTK_STATE_NORMAL])
{
GdkRectangle rect;
rect.x = 0;
rect.y = pixel_start_height;
rect.width = running_offset;
rect.height = LINE_HEIGHT (*lp);
clear_area (text, &rect);
}
}
for (; chars > 0; chars -= len, buffer += len, len = 0)
{
if (buffer[0] != '\t')
{
guchar* next_tab = memchr (buffer, '\t', chars);
gint pixel_width;
GdkFont *font;
len = MIN (MARK_CURRENT_PROPERTY (&mark)->length - mark.offset, chars);
if (next_tab)
len = MIN (len, next_tab - buffer);
if (mark.index < selection_start_pos)
len = MIN (len, selection_start_pos - mark.index);
else if (mark.index < selection_end_pos)
len = MIN (len, selection_end_pos - mark.index);
font = MARK_CURRENT_PROPERTY (&mark)->font->gdk_font;
if (font->type == GDK_FONT_FONT)
{
gdk_gc_set_font (text->gc, font);
gdk_gc_get_values (text->gc, &gc_values);
pixel_width = gdk_text_width (gc_values.font,
(gchar*) buffer, len);
}
else
pixel_width = gdk_text_width (font, (gchar*) buffer, len);
bg_gc = mark_bg_gc (text, &mark);
if (bg_gc)
gdk_draw_rectangle (text->text_area,
bg_gc,
TRUE,
running_offset,
pixel_start_height,
pixel_width,
LINE_HEIGHT(*lp));
else if (!editable->editable &&
GTK_WIDGET (text)->style->bg_pixmap[GTK_STATE_NORMAL])
{
GdkRectangle rect;
rect.x = running_offset;
rect.y = pixel_start_height;
rect.width = pixel_width;
rect.height = LINE_HEIGHT (*lp);
clear_area (text, &rect);
}
if ((mark.index >= selection_start_pos) &&
(mark.index < selection_end_pos))
{
if (editable->has_selection)
fg_gc = GTK_WIDGET(text)->style->fg_gc[GTK_STATE_SELECTED];
else
fg_gc = GTK_WIDGET(text)->style->fg_gc[GTK_STATE_ACTIVE];
}
else
{
gdk_gc_set_foreground (text->gc, MARK_CURRENT_FORE (&mark));
fg_gc = text->gc;
}
gdk_draw_text (text->text_area, MARK_CURRENT_FONT (&mark),
fg_gc,
running_offset,
pixel_height,
(gchar*) buffer,
len);
running_offset += pixel_width;
advance_tab_mark_n (text, &tab_mark, len);
}
else
{
len = 1;
bg_gc = mark_bg_gc (text, &mark);
if (bg_gc)
{
gint pixels_remaining;
gint space_width;
gint spaces_avail;
gdk_window_get_size (text->text_area, &pixels_remaining, NULL);
pixels_remaining -= (LINE_WRAP_ROOM + running_offset);
space_width = MARK_CURRENT_TEXT_FONT(&mark)->char_widths[' '];
spaces_avail = pixels_remaining / space_width;
spaces_avail = MIN (spaces_avail, tab_mark.to_next_tab);
gdk_draw_rectangle (text->text_area,
bg_gc,
TRUE,
running_offset,
pixel_start_height,
spaces_avail * space_width,
LINE_HEIGHT (*lp));
}
running_offset += tab_mark.to_next_tab *
MARK_CURRENT_TEXT_FONT(&mark)->char_widths[' '];
advance_tab_mark (text, &tab_mark, '\t');
}
advance_mark_n (&mark, len);
}
}
static void
draw_line_wrap (GtkText* text, guint height /* baseline height */)
{
gint width;
GdkPixmap *bitmap;
gint bitmap_width;
gint bitmap_height;
if (text->line_wrap)
{
bitmap = text->line_wrap_bitmap;
bitmap_width = line_wrap_width;
bitmap_height = line_wrap_height;
}
else
{
bitmap = text->line_arrow_bitmap;
bitmap_width = line_arrow_width;
bitmap_height = line_arrow_height;
}
gdk_window_get_size (text->text_area, &width, NULL);
width -= LINE_WRAP_ROOM;
gdk_gc_set_stipple (text->gc,
bitmap);
gdk_gc_set_fill (text->gc, GDK_STIPPLED);
gdk_gc_set_foreground (text->gc, &GTK_WIDGET (text)->style->text[GTK_STATE_NORMAL]);
gdk_gc_set_ts_origin (text->gc,
width + 1,
height - bitmap_height - 1);
gdk_draw_rectangle (text->text_area,
text->gc,
TRUE,
width + 1,
height - bitmap_height - 1 /* one pixel above the baseline. */,
bitmap_width,
bitmap_height);
gdk_gc_set_ts_origin (text->gc, 0, 0);
gdk_gc_set_fill (text->gc, GDK_SOLID);
}
static void
undraw_cursor (GtkText* text, gint absolute)
{
GtkEditable *editable = (GtkEditable *)text;
TDEBUG (("in undraw_cursor\n"));
if (absolute)
text->cursor_drawn_level = 0;
if ((text->cursor_drawn_level ++ == 0) &&
text->has_cursor &&
(editable->selection_start_pos == editable->selection_end_pos) &&
GTK_WIDGET_DRAWABLE (text))
{
GdkFont* font;
g_assert(text->cursor_mark.property);
font = MARK_CURRENT_FONT(&text->cursor_mark);
if (GTK_WIDGET (text)->style->bg_pixmap[GTK_STATE_NORMAL] &&
!editable->editable)
{
GdkRectangle rect;
rect.x = text->cursor_pos_x;
rect.y = text->cursor_pos_y - text->cursor_char_offset - font->ascent;
rect.width = 1;
rect.height = font->ascent + 1; /* @@@ I add one here because draw_line is inclusive, right? */
clear_area (text, &rect);
}
else
{
gdk_gc_set_foreground (text->gc, MARK_CURRENT_BACK (&text->cursor_mark));
gdk_draw_line (text->text_area, text->gc, text->cursor_pos_x,
text->cursor_pos_y - text->cursor_char_offset, text->cursor_pos_x,
text->cursor_pos_y - text->cursor_char_offset - font->ascent);
}
if (text->cursor_char)
{
if (font->type == GDK_FONT_FONT)
gdk_gc_set_font (text->gc, font);
gdk_gc_set_foreground (text->gc, MARK_CURRENT_FORE (&text->cursor_mark));
gdk_draw_text (text->text_area, font,
text->gc,
text->cursor_pos_x,
text->cursor_pos_y - text->cursor_char_offset,
&text->cursor_char,
1);
}
}
}
static gint
drawn_cursor_min (GtkText* text)
{
if (text->has_cursor)
{
GdkFont* font;
g_assert(text->cursor_mark.property);
font = MARK_CURRENT_FONT(&text->cursor_mark);
return text->cursor_pos_y - text->cursor_char_offset - font->ascent;
}
else
return 0;
}
static gint
drawn_cursor_max (GtkText* text)
{
if (text->has_cursor)
{
GdkFont* font;
g_assert(text->cursor_mark.property);
font = MARK_CURRENT_FONT(&text->cursor_mark);
return text->cursor_pos_y - text->cursor_char_offset;
}
else
return 0;
}
static void
draw_cursor (GtkText* text, gint absolute)
{
GtkEditable *editable = (GtkEditable *)text;
TDEBUG (("in draw_cursor\n"));
if (absolute)
text->cursor_drawn_level = 1;
if ((--text->cursor_drawn_level == 0) &&
text->has_cursor &&
editable->editable &&
(editable->selection_start_pos == editable->selection_end_pos) &&
GTK_WIDGET_DRAWABLE (text))
{
GdkFont* font;
g_assert (text->cursor_mark.property);
font = MARK_CURRENT_FONT (&text->cursor_mark);
gdk_gc_set_foreground (text->gc, &GTK_WIDGET (text)->style->text[GTK_STATE_NORMAL]);
gdk_draw_line (text->text_area, text->gc, text->cursor_pos_x,
text->cursor_pos_y - text->cursor_char_offset,
text->cursor_pos_x,
text->cursor_pos_y - text->cursor_char_offset - font->ascent);
}
}
static void
clear_area (GtkText *text, GdkRectangle *area)
{
GtkWidget *widget = GTK_WIDGET (text);
if (widget->style->bg_pixmap[GTK_STATE_NORMAL] &&
!GTK_EDITABLE(text)->editable)
{
gint width, height;
gint x = area->x, y = area->y;
gint xorig, yorig;
gdk_window_get_size (widget->style->bg_pixmap[GTK_STATE_NORMAL], &width, &height);
yorig = - text->first_onscreen_ver_pixel;
xorig = - text->first_onscreen_hor_pixel;
for (y = area->y; y < area->y + area->height; )
{
gint yoff = (y - yorig) % height;
gint yw = MIN(height - yoff, (area->y + area->height) - y);
for (x = area->x; x < area->x + area->width; )
{
gint xoff = (x - xorig) % width;
gint xw = MIN(width - xoff, (area->x + area->width) - x);
gdk_draw_pixmap (text->text_area,
text->gc,
widget->style->bg_pixmap[GTK_STATE_NORMAL],
xoff,
yoff,
x,
y,
xw,
yw);
x += width - xoff;
}
y += height - yoff;
}
}
else
gdk_window_clear_area (text->text_area, area->x, area->y, area->width, area->height);
}
static void
expose_text (GtkText* text, GdkRectangle *area, gboolean cursor)
{
GList *cache = text->line_start_cache;
gint pixels = - text->first_cut_pixels;
gint min_y = area->y;
gint max_y = area->y + area->height;
gint height;
gdk_window_get_size (text->text_area, NULL, &height);
max_y = MIN (max_y, height);
TDEBUG (("in expose x=%d y=%d w=%d h=%d\n", area->x, area->y, area->width, area->height));
clear_area (text, area);
for (; pixels < height; cache = cache->next)
{
if (pixels < max_y && (pixels + LINE_HEIGHT(CACHE_DATA(cache))) >= min_y)
{
draw_line (text, pixels, &CACHE_DATA(cache));
if (CACHE_DATA(cache).wraps)
draw_line_wrap (text, pixels + CACHE_DATA(cache).font_ascent);
}
if (cursor && text->has_cursor && GTK_WIDGET_HAS_FOCUS (text))
{
if (CACHE_DATA(cache).start.index <= text->cursor_mark.index &&
CACHE_DATA(cache).end.index >= text->cursor_mark.index)
draw_cursor (text, TRUE);
}
pixels += LINE_HEIGHT(CACHE_DATA(cache));
if (!cache->next)
{
fetch_lines_forward (text, 1);
if (!cache->next)
break;
}
}
}
static void
gtk_text_update_text (GtkEditable *editable,
gint start_pos,
gint end_pos)
{
GtkText *text = GTK_TEXT (editable);
GList *cache = text->line_start_cache;
gint pixels = - text->first_cut_pixels;
GdkRectangle area;
gint width;
gint height;
if (end_pos < 0)
end_pos = TEXT_LENGTH (text);
gdk_window_get_size (text->text_area, &width, &height);
area.x = 0;
area.y = -1;
area.width = width;
area.height = 0;
TDEBUG (("in expose span start=%d stop=%d\n", start_pos, end_pos));
for (; pixels < height; cache = cache->next)
{
if (CACHE_DATA(cache).start.index < end_pos)
{
if (CACHE_DATA(cache).end.index >= start_pos)
{
if (area.y < 0)
area.y = pixels;
area.height = pixels + LINE_HEIGHT(CACHE_DATA(cache)) - area.y;
}
}
else
break;
pixels += LINE_HEIGHT(CACHE_DATA(cache));
if (!cache->next)
{
fetch_lines_forward (text, 1);
if (!cache->next)
break;
}
}
if (area.y >= 0)
expose_text (text, &area, TRUE);
}
static void
recompute_geometry (GtkText* text)
{
GtkPropertyMark start_mark;
gint height;
gint width;
free_cache (text);
start_mark = set_vertical_scroll (text);
gdk_window_get_size (text->text_area, &width, &height);
text->line_start_cache = fetch_lines (text,
&start_mark,
NULL,
FetchLinesPixels,
height + text->first_cut_pixels);
find_cursor (text, TRUE);
}
/**********************************************************************/
/* Selection */
/**********************************************************************/
void
gtk_text_set_selection (GtkEditable *editable,
gint start,
gint end)
{
GtkText *text = GTK_TEXT (editable);
guint start1, end1, start2, end2;
if (end < 0)
end = TEXT_LENGTH (text);
start1 = MIN(start,end);
end1 = MAX(start,end);
start2 = MIN(editable->selection_start_pos, editable->selection_end_pos);
end2 = MAX(editable->selection_start_pos, editable->selection_end_pos);
if (start2 < start1)
{
guint tmp;
tmp = start1; start1 = start2; start2 = tmp;
tmp = end1; end1 = end2; end2 = tmp;
}
undraw_cursor (text, FALSE);
editable->selection_start_pos = start;
editable->selection_end_pos = end;
draw_cursor (text, FALSE);
/* Expose only what changed */
if (start1 < start2)
gtk_text_update_text (editable, start1, MIN(end1, start2));
if (end2 > end1)
gtk_text_update_text (editable, MAX(end1, start2), end2);
else if (end2 < end1)
gtk_text_update_text (editable, end2, end1);
}
/**********************************************************************/
/* Debug */
/**********************************************************************/
#ifdef DEBUG_GTK_TEXT
static void
gtk_text_show_cache_line (GtkText *text, GList *cache,
const char* what, const char* func, gint line)
{
LineParams *lp = &CACHE_DATA(cache);
gint i;
if (cache == text->line_start_cache)
g_print ("Line Start Cache: ");
if (cache == text->current_line)
g_print("Current Line: ");
g_print ("%s:%d: cache line %s s=%d,e=%d,lh=%d (",
func,
line,
what,
lp->start.index,
lp->end.index,
LINE_HEIGHT(*lp));
for (i = lp->start.index; i < (lp->end.index + lp->wraps); i += 1)
g_print ("%c", GTK_TEXT_INDEX (text, i));
g_print (")\n");
}
static void
gtk_text_show_cache (GtkText *text, const char* func, gint line)
{
GList *l = text->line_start_cache;
if (!l) {
return;
}
/* back up to the absolute beginning of the line cache */
while (l->prev)
l = l->prev;
g_print ("*** line cache ***\n");
for (; l; l = l->next)
gtk_text_show_cache_line (text, l, "all", func, line);
}
static void
gtk_text_assert_mark (GtkText *text,
GtkPropertyMark *mark,
GtkPropertyMark *before,
GtkPropertyMark *after,
const gchar *msg,
const gchar *where,
gint line)
{
GtkPropertyMark correct_mark = find_mark (text, mark->index);
if (mark->offset != correct_mark.offset ||
mark->property != correct_mark.property)
g_warning ("incorrect %s text property marker in %s:%d, index %d -- bad!", where, msg, line, mark->index);
}
static void
gtk_text_assert (GtkText *text,
const gchar *msg,
gint line)
{
GList* cache = text->line_start_cache;
GtkPropertyMark* before_mark = NULL;
GtkPropertyMark* after_mark = NULL;
gtk_text_show_props (text, msg, line);
for (; cache->prev; cache = cache->prev)
/* nothing */;
g_print ("*** line markers ***\n");
for (; cache; cache = cache->next)
{
after_mark = &CACHE_DATA(cache).end;
gtk_text_assert_mark (text, &CACHE_DATA(cache).start, before_mark, after_mark, msg, "start", line);
before_mark = &CACHE_DATA(cache).start;
if (cache->next)
after_mark = &CACHE_DATA(cache->next).start;
else
after_mark = NULL;
gtk_text_assert_mark (text, &CACHE_DATA(cache).end, before_mark, after_mark, msg, "end", line);
before_mark = &CACHE_DATA(cache).end;
}
}
static void
gtk_text_show_adj (GtkText *text,
GtkAdjustment *adj,
const char* what,
const char* func,
gint line)
{
g_print ("*** adjustment ***\n");
g_print ("%s:%d: %s adjustment l=%.1f u=%.1f v=%.1f si=%.1f pi=%.1f ps=%.1f\n",
func,
line,
what,
adj->lower,
adj->upper,
adj->value,
adj->step_increment,
adj->page_increment,
adj->page_size);
}
static void
gtk_text_show_props (GtkText *text,
const char* msg,
int line)
{
GList* props = text->text_properties;
int proplen = 0;
g_print ("%s:%d: ", msg, line);
for (; props; props = props->next)
{
TextProperty *p = (TextProperty*)props->data;
proplen += p->length;
g_print ("[%d,%p,%p,%p,%p] ", p->length, p, p->font, p->fore_color, p->back_color);
}
g_print ("\n");
if (proplen - 1 != TEXT_LENGTH(text))
g_warning ("incorrect property list length in %s:%d -- bad!", msg, line);
}
#endif
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