/* 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 #include #include "gdk/gdkkeysyms.h" #include "gtkmain.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 3 #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 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_INDEX(t, index) ((index) < (t)->gap_position ? (t)->text[index] : \ (t)->text[(index) + (t)->gap_size]) #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_finalize (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); /* 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 gint gtk_text_selection_clear (GtkWidget *widget, GdkEventSelection *event); static gint gtk_text_selection_request (GtkWidget *widget, GdkEventSelection *event); static gint gtk_text_selection_notify (GtkWidget *widget, GdkEventSelection *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); static TextProperty* new_text_property (GdkFont* font, GdkColor* fore, GdkColor* back, guint length); /* Display */ 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_char_line_expose (GtkText* text, gchar key, guint old_pixels); static void delete_char_line_expose (GtkText* text, gchar key, 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); static void find_cursor_at_line (GtkText* text, const LineParams* start_line, gint pixel_height); static void mouse_click_1 (GtkText* text, GdkEventButton *event); /* 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); /* #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; /**********************************************************************/ /* 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_widget_get_type (), &text_info); } return text_type; } static void gtk_text_class_init (GtkTextClass *class) { GtkObjectClass *object_class; GtkWidgetClass *widget_class; object_class = (GtkObjectClass*) class; widget_class = (GtkWidgetClass*) class; parent_class = gtk_type_class (gtk_widget_get_type ()); object_class->finalize = gtk_text_finalize; 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; widget_class->selection_clear_event = gtk_text_selection_clear; widget_class->selection_request_event = gtk_text_selection_request; widget_class->selection_notify_event = gtk_text_selection_notify; } 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->is_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) { g_return_if_fail (text != NULL); g_return_if_fail (GTK_IS_TEXT (text)); text->is_editable = (editable != FALSE); } 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) { g_return_if_fail (text != NULL); g_return_if_fail (GTK_IS_TEXT (text)); g_assert (GTK_WIDGET_REALIZED (text)); if (fore == NULL) fore = &text->widget.style->fg[GTK_STATE_NORMAL]; if (back == NULL) back = &text->widget.style->bg[GTK_STATE_NORMAL]; /* This must be because we need to have the style set up. */ g_assert (GTK_WIDGET_REALIZED(text)); if (length < 0) length = strlen (chars); if (length == 0) return; 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); } 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) { 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; move_gap_to_point (text); text->gap_size += nchars; delete_text_property (text, nchars); return TRUE; } static void gtk_text_finalize (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)); if (text->vadj) gtk_object_unref (GTK_OBJECT (text->vadj)); GTK_OBJECT_CLASS(parent_class)->finalize (object); } static void gtk_text_realize (GtkWidget *widget) { GtkText *text; GdkWindowAttr attributes; gint attributes_mask; g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_TEXT (widget)); text = (GtkText*) 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 its handled specially */ if (!text->widget.style->bg_pixmap[GTK_STATE_NORMAL]) gdk_window_set_background (text->widget.window, &text->widget.style->bg[GTK_STATE_NORMAL]); if (!text->widget.style->bg_pixmap[GTK_STATE_NORMAL]) gdk_window_set_background (text->text_area, &text->widget.style->bg[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->fg[GTK_STATE_NORMAL]); init_properties (text); gdk_window_show (text->text_area); } 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) { gint ythick = TEXT_BORDER_ROOM + text->widget.style->klass->ythickness; gint xthick = TEXT_BORDER_ROOM + text->widget.style->klass->xthickness; gint width, height; gint xorig, yorig; gint x, y; gdk_window_get_size (text->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 (text->widget.window, text->gc, text->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)) { TDEBUG (("in gtk_text_draw_focus\n")); x = 0; y = 0; width = widget->allocation.width; height = widget->allocation.height; if (widget->style->bg_pixmap[GTK_STATE_NORMAL]) { gint ythick = TEXT_BORDER_ROOM + widget->style->klass->ythickness; gint xthick = TEXT_BORDER_ROOM + widget->style->klass->xthickness; /* top rect */ clear_focus_area (text, 0, 0, width, ythick); /* right rect */ clear_focus_area (text, 0, ythick, xthick, height - 2 * ythick); /* left rect */ clear_focus_area (text, width - xthick, ythick, xthick, height - 2 * ythick); /* bottom rect */ clear_focus_area (text, 0, height - ythick, width, ythick); } if (GTK_WIDGET_HAS_FOCUS (widget)) { x += 1; y += 1; width -= 2; height -= 2; gdk_draw_rectangle (widget->window, widget->style->fg_gc[GTK_STATE_NORMAL], FALSE, 0, 0, widget->allocation.width - 1, widget->allocation.height - 1); } else { gdk_draw_rectangle (widget->window, widget->style->white_gc, FALSE, x + 2, y + 2, width - 1 - 2, height - 1 - 2); } gtk_draw_shadow (widget->style, widget->window, GTK_STATE_NORMAL, GTK_SHADOW_IN, x, y, width, height); } 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; g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_TEXT (widget)); g_return_if_fail (allocation != NULL); text = GTK_TEXT (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); 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_button_press (GtkWidget *widget, GdkEventButton *event) { GtkText *text; 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 (!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 (GTK_TEXT (widget), FALSE); mouse_click_1 (GTK_TEXT (widget), event); draw_cursor (GTK_TEXT (widget), FALSE); /* start selection */ break; case GDK_2BUTTON_PRESS: /* select word */ break; case GDK_3BUTTON_PRESS: /* select line */ break; default: break; } } else if (event->type == GDK_BUTTON_PRESS) { if (event->button == 2) { /* insert selection. */ } else { /* start selection */ } } return FALSE; } static gint gtk_text_button_release (GtkWidget *widget, GdkEventButton *event) { GtkText *text; 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->button != 2) { gtk_grab_remove (widget); text = GTK_TEXT (widget); /* stop selecting. */ } return FALSE; } static gint gtk_text_motion_notify (GtkWidget *widget, GdkEventMotion *event) { GtkText *text; gint x; 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; if (event->is_hint || (text->text_area != event->window)) gdk_window_get_pointer (text->text_area, &x, NULL, NULL); /* update selection */ return FALSE; } static void gtk_text_insert_1_at_point (GtkText* text, char key) { gtk_text_insert (text, MARK_CURRENT_FONT (&text->point), MARK_CURRENT_FORE (&text->point), MARK_CURRENT_BACK (&text->point), &key, 1); insert_char_line_expose (text, key, total_line_height (text, text->current_line, 1)); } static void gtk_text_backward_delete_1_at_point (GtkText* text, char key) { gtk_text_backward_delete (text, 1); delete_char_line_expose (text, key, total_line_height (text, text->current_line, 1)); } static void gtk_text_forward_delete_1_at_point (GtkText* text, char key) { gtk_text_forward_delete (text, 1); delete_char_line_expose (text, key, total_line_height (text, text->current_line, 1)); } static gint gtk_text_key_press (GtkWidget *widget, GdkEventKey *event) { GtkText *text; 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); if (!return_val) { key = event->keyval; return_val = TRUE; if (text->is_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: break; } } else { text->point = find_mark (text, text->cursor_mark.index); 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 (!text->has_cursor || text->cursor_mark.index == 0) break; gtk_text_backward_delete_1_at_point (text, key); break; case GDK_Delete: if (!text->has_cursor || LAST_INDEX (text, text->cursor_mark)) break; gtk_text_forward_delete_1_at_point (text, key); 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; default: if (!text->has_cursor) break; if ((event->keyval >= 0x20) && (event->keyval <= 0x7e)) { return_val = TRUE; if (event->state & GDK_CONTROL_MASK) { if ((key >= 'A') && (key <= 'Z')) key -= 'A' - 'a'; if ((key >= 'a') && (key <= 'z') && text->control_keys[(int) (key - 'a')]) (* text->control_keys[(int) (key - 'a')]) (text); } else if (event->state & GDK_MOD1_MASK) { g_message ("alt key"); if ((key >= 'A') && (key <= 'Z')) key -= 'A' - 'a'; if ((key >= 'a') && (key <= 'z') && text->alt_keys[(int) (key - 'a')]) (* text->alt_keys[(int) (key - 'a')]) (text); } else { gtk_text_insert_1_at_point (text, key); } } else { return_val = FALSE; } break; } } } 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); 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); 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 && 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; } 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 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 -= 1; end->index -= 1; 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_char_line_expose (GtkText* text, gchar key, guint old_pixels) { gint pixel_height; guint new_pixels = 0; gint old_line_count = 1 + (key == LINE_DELIM); GdkRectangle rect; GList* new_line = NULL; gint width, height; text->cursor_virtual_x = 0; undraw_cursor (text, FALSE); correct_cache_delete (text, old_line_count); 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_line_count); 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); draw_cursor (text, FALSE); if (old_pixels != new_pixels) process_exposes (text); TEXT_ASSERT (text); TEXT_SHOW(text); } static void correct_cache_insert (GtkText* text) { GList* cache = text->current_line; for (; cache; cache = cache->next) { GtkPropertyMark *start = &CACHE_DATA(cache).start; GtkPropertyMark *end = &CACHE_DATA(cache).end; if (start->index >= text->point.index) { if (start->property == text->point.property) move_mark_n(start, 1); else start->index += 1; } if (end->index >= text->point.index) { if (end->property == text->point.property) move_mark_n(end, 1); else end->index += 1; } /*TEXT_ASSERT_MARK(text, start, "start");*/ /*TEXT_ASSERT_MARK(text, end, "end");*/ } } static void insert_char_line_expose (GtkText* text, gchar key, guint old_pixels) { gint pixel_height; guint new_pixels = 0; guint new_line_count = 1 + (key == LINE_DELIM); GdkRectangle rect; GList* new_line = NULL; gint width, height; text->cursor_virtual_x = 0; undraw_cursor (text, FALSE); correct_cache_insert (text); TEXT_SHOW_ADJ (text, text->vadj, "vadj"); pixel_height = pixel_height_of(text, text->current_line) - LINE_HEIGHT(CACHE_DATA(text->current_line)); new_line = 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_line, 1); text->current_line = new_line; new_pixels = total_line_height (text, new_line, 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); 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, fore, back, 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) { 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 (text->widget.style->font, &text->widget.style->fg[GTK_STATE_NORMAL], &text->widget.style->bg[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; } static void find_line_containing_point (GtkText* text, guint point) { 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 ( ( (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"); 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 (FALSE); /* 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 = 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; 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, 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 = TEXT_INDEX (text, mark.index); if (!isspace(ch)) text->cursor_char = ch; else text->cursor_char = 0; } static void find_cursor (GtkText* text) { if (!text->has_cursor) return; find_line_containing_point (text, text->cursor_mark.index); 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)); } static void mouse_click_1_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; guint char_width = find_char_width(text, &mark, &tab_mark); guint pixel_width = LINE_START_PIXEL (*lp) + (char_width+1)/2; text->cursor_pos_y = line_pixel_height; for (;;) { gchar ch = 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 mouse_click_1 (GtkText* text, GdkEventButton *event) { if (text->is_editable) { 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 (event->y < pixel_height || !cache->next) { mouse_click_1_at_line (text, &CACHE_DATA(cache), pixel_height, event->x); find_cursor (text); 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) && 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) || TEXT_INDEX(text, mark.index) == LINE_DELIM) break; undraw_cursor (text, FALSE); text->cursor_mark = mark; find_cursor (text); 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); draw_cursor (text, FALSE); } /**********************************************************************/ /* 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) { GdkEventButton button; button.x = text->cursor_pos_x; button.y = first_visible_line_height (text); mouse_click_1 (text, &button); } } 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) { GdkEventButton button; button.x = text->cursor_pos_x; button.y = last_visible_line_height(text); mouse_click_1 (text, &button); } } 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 = 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; } } 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; 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] = 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 && MARK_CURRENT_BACK (&mark)) { gdk_gc_set_foreground (text->gc, MARK_CURRENT_BACK (&mark)); gdk_draw_rectangle (text->text_area, text->gc, TRUE, 0, pixel_start_height, running_offset, LINE_HEIGHT (*lp)); } 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); 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); if (MARK_CURRENT_BACK (&mark)) { gdk_gc_set_foreground (text->gc, MARK_CURRENT_BACK (&mark)); gdk_draw_rectangle (text->text_area, text->gc, TRUE, running_offset, pixel_start_height, pixel_width, LINE_HEIGHT(*lp)); } gdk_gc_set_foreground (text->gc, MARK_CURRENT_FORE (&mark)); gdk_draw_text (text->text_area, MARK_CURRENT_FONT (&mark), text->gc, running_offset, pixel_height, (gchar*) buffer, len); running_offset += pixel_width; advance_tab_mark_n (text, &tab_mark, len); } else { len = 1; if (MARK_CURRENT_BACK (&mark)) { 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_gc_set_foreground (text->gc, MARK_CURRENT_BACK (&mark)); gdk_draw_rectangle (text->text_area, text->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, &text->widget.style->fg[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) { TDEBUG (("in undraw_cursor\n")); if (absolute) text->cursor_drawn_level = 0; if (text->has_cursor && (text->cursor_drawn_level ++ == 0)) { GdkFont* font; g_assert(text->cursor_mark.property); font = MARK_CURRENT_FONT(&text->cursor_mark); if (text->widget.style->bg_pixmap[GTK_STATE_NORMAL]) { 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 { if (MARK_CURRENT_BACK (&text->cursor_mark)) gdk_gc_set_foreground (text->gc, MARK_CURRENT_BACK (&text->cursor_mark)); else gdk_gc_set_foreground (text->gc, &text->widget.style->bg[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); } 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) { TDEBUG (("in draw_cursor\n")); if (absolute) text->cursor_drawn_level = 1; if (text->has_cursor && (--text->cursor_drawn_level == 0)) { GdkFont* font; g_assert (text->cursor_mark.property); font = MARK_CURRENT_FONT (&text->cursor_mark); gdk_gc_set_foreground (text->gc, &text->widget.style->fg[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) { if (text->widget.style->bg_pixmap[GTK_STATE_NORMAL]) { gint width, height; gint x = area->x, y = area->y; gint xorig, yorig; gdk_window_get_size (text->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, text->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->widget)) { 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 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); } /**********************************************************************/ /* Selection */ /**********************************************************************/ static gint gtk_text_selection_clear (GtkWidget *widget, GdkEventSelection *event) { #if 0 GtkEntry *entry; g_return_val_if_fail (widget != NULL, FALSE); g_return_val_if_fail (GTK_IS_ENTRY (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); entry = GTK_ENTRY (widget); if (entry->have_selection) { entry->have_selection = FALSE; gtk_entry_queue_draw (entry); } #endif return FALSE; } static gint gtk_text_selection_request (GtkWidget *widget, GdkEventSelection *event) { #if 0 GtkEntry *entry; gint selection_start_pos; gint selection_end_pos; g_return_val_if_fail (widget != NULL, FALSE); g_return_val_if_fail (GTK_IS_ENTRY (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); entry = GTK_ENTRY (widget); if (entry->selection_start_pos != entry->selection_end_pos) { selection_start_pos = MIN (entry->selection_start_pos, entry->selection_end_pos); selection_end_pos = MAX (entry->selection_start_pos, entry->selection_end_pos); gdk_selection_set (event->requestor, event->selection, event->property, event->time, (guchar*) &entry->text[selection_start_pos], selection_end_pos - selection_start_pos); } #endif return FALSE; } static gint gtk_text_selection_notify (GtkWidget *widget, GdkEventSelection *event) { #if 0 GtkEntry *entry; gchar *data; gint tmp_pos; gint reselect; g_return_val_if_fail (widget != NULL, FALSE); g_return_val_if_fail (GTK_IS_ENTRY (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); entry = GTK_ENTRY (widget); gdk_selection_get (widget->window, (guchar**) &data); reselect = FALSE; if (entry->selection_start_pos != entry->selection_end_pos) { reselect = TRUE; gtk_delete_selection (entry); } tmp_pos = entry->current_pos; gtk_entry_insert_text (entry, data, strlen (data), &tmp_pos); if (reselect) { reselect = entry->have_selection; gtk_select_region (entry, entry->current_pos, tmp_pos); entry->have_selection = reselect; } entry->current_pos = tmp_pos; gtk_entry_queue_draw (entry); #endif return FALSE; } /**********************************************************************/ /* 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", 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; /* 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