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screen.c
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#include "config.h"
#include <X11/Xft/Xft.h>
#include <gdk/gdkpango.h>
#include <gdk/gdkx.h>
#include <gtk/gtk.h>
#include <glib/gmacros.h>
#include <fontconfig/fontconfig.h>
#ifdef HAVE_XKB
#include <X11/XKBlib.h>
#include <X11/Xlib.h>
#endif
#include "screen.h"
#include "screen-private.h"
#include "screen-xft.h"
#include "glyphcache.h"
#define TEMU_SCREEN_UPDATE_DELAY_MS 5
static void temu_screen_resize(TemuScreen *screen, gint width, gint height);
/*
* object/memory management
*/
static void temu_screen_init(TemuScreen *screen);
static void temu_screen_destroy(GtkObject *object);
static void temu_screen_realize(GtkWidget *widget);
static void temu_screen_unrealize(GtkWidget *widget);
static void temu_screen_size_request(GtkWidget *widget, GtkRequisition *requisition);
static void temu_screen_size_allocate(GtkWidget *widget, GtkAllocation *allocation);
static gboolean temu_screen_expose(GtkWidget *widget, GdkEventExpose *event);
static gboolean temu_screen_button_press_event(GtkWidget *widget, GdkEventButton *event);
static gboolean temu_screen_button_motion_event(GtkWidget *widget, GdkEventMotion *event);
static gboolean temu_screen_button_release_event(GtkWidget *widget, GdkEventButton *event);
static void temu_screen_fill_rect_internal(TemuScreen *screen, gint x, gint y, gint width, gint height, const temu_cell_t *cell);
static void temu_screen_invalidate_cell(TemuScreen *screen, gint x, gint y);
static void temu_screen_apply_updates(TemuScreen *screen);
static void temu_screen_class_init(TemuScreenClass *klass)
{
// GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
// gobject_class = G_OBJECT_CLASS(klass);
widget_class = GTK_WIDGET_CLASS(klass);
GTK_OBJECT_CLASS (klass)->destroy = temu_screen_destroy;
widget_class->realize = temu_screen_realize;
widget_class->unrealize = temu_screen_unrealize;
widget_class->size_request = temu_screen_size_request;
widget_class->size_allocate = temu_screen_size_allocate;
widget_class->expose_event = temu_screen_expose;
widget_class->button_press_event = temu_screen_button_press_event;
widget_class->button_release_event = temu_screen_button_release_event;
widget_class->motion_notify_event = temu_screen_button_motion_event;
}
GType temu_screen_get_type(void)
{
static GtkType temu_screen_type = 0;
static const GTypeInfo temu_screen_info = {
sizeof(TemuScreenClass),
(GBaseInitFunc)NULL,
(GBaseFinalizeFunc)NULL,
(GClassInitFunc)temu_screen_class_init,
(GClassFinalizeFunc)NULL,
(gconstpointer)NULL,
sizeof(TemuScreen),
0,
(GInstanceInitFunc)temu_screen_init,
(GTypeValueTable*)NULL,
};
if (temu_screen_type == 0) {
temu_screen_type = g_type_register_static(
GTK_TYPE_WIDGET,
"TemuScreen",
&temu_screen_info,
0
);
}
return temu_screen_type;
}
GtkWidget *temu_screen_new(void)
{
return GTK_WIDGET(g_object_new(temu_screen_get_type(), NULL));
}
static void temu_screen_init(TemuScreen *screen)
{
GtkWidget *widget = GTK_WIDGET(screen);
TemuScreenPrivate *priv;
GTK_WIDGET_SET_FLAGS(widget, GTK_CAN_FOCUS);
gtk_widget_set_redraw_on_allocate(widget, FALSE);
priv = screen->priv = g_malloc0(sizeof(*screen->priv));
/* default attributes */
priv->resize_cell.ch.glyph = L' ';
priv->resize_cell.attr.fg = TEMU_SCREEN_FG_DEFAULT;
priv->resize_cell.attr.bg = TEMU_SCREEN_BG_DEFAULT;
/* updates */
priv->moves.next = priv->moves.prev = &priv->moves;
priv->moves_free = NULL;
/* cell screen */
/*memset(&priv->screen_attr, 0, sizeof(temu_scr_attr_t));*/
priv->scroll_top = 0;
priv->scroll_offset = 0;
priv->view_offset = 0;
priv->width = 0;
priv->height = 0;
priv->lines = NULL;
priv->visible_height = 24;
temu_screen_resize(screen, 80, 24);
/* on-screen */
screen->font_width = 0;
screen->font_height = 0;
/* selections */
priv->selected = FALSE;
priv->select_x = priv->select_y = 0;
/* options */
priv->double_buffered = TRUE;
priv->fontdesc = pango_font_description_from_string("Fixed 14");
}
static void temu_screen_realize(GtkWidget *widget)
{
const guint8 colors[TEMU_SCREEN_MAX_COLORS][3] = {
{ 0, 0, 0 },
{ 170, 0, 0 },
{ 0, 170, 0 },
{ 170, 85, 0 },
{ 0, 0, 170 },
{ 170, 0, 170 },
{ 0, 170, 170 },
{ 170, 170, 170 },
{ 85, 85, 85 },
{ 255, 85, 85 },
{ 85, 255, 85 },
{ 255, 255, 85 },
{ 85, 85, 255 },
{ 255, 85, 255 },
{ 85, 255, 255 },
{ 255, 255, 255 },
#include "256colors.h"
{ 255, 255, 255 },
};
TemuScreen *screen = TEMU_SCREEN(widget);
TemuScreenPrivate *priv = screen->priv;
GdkWindowAttr attributes;
gint attributes_mask;
GdkRectangle *urect;
GdkPixmap *cursor_dot_pm;
GdkDisplay *display = gtk_widget_get_display(widget);
GdkVisual *visual = gtk_widget_get_visual(widget);
GdkColormap *colormap = gtk_widget_get_colormap(widget);
gint i;
GTK_WIDGET_UNSET_FLAGS(widget, GTK_DOUBLE_BUFFERED);
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 = visual;
attributes.colormap = colormap;
attributes.event_mask = gtk_widget_get_events(widget);
attributes.event_mask |= GDK_EXPOSURE_MASK
| GDK_KEY_PRESS_MASK
| GDK_KEY_RELEASE_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_POINTER_MOTION_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, widget);
gdk_window_move_resize(
widget->window,
widget->allocation.x,
widget->allocation.y,
widget->allocation.width,
widget->allocation.height
);
gdk_window_show(widget->window);
cursor_dot_pm = gdk_pixmap_create_from_data(widget->window,
"\0", 1, 1, 1,
&widget->style->black,
&widget->style->black);
priv->cursor_bar = gdk_cursor_new_for_display(display, GDK_XTERM);
priv->cursor_dot = gdk_cursor_new_from_pixmap(cursor_dot_pm, cursor_dot_pm,
&widget->style->black,
&widget->style->black,
0, 0);
gdk_window_set_cursor(widget->window, priv->cursor_bar);
priv->cursor_current = priv->cursor_bar;
g_object_unref (cursor_dot_pm);
if (priv->double_buffered) {
priv->pixmap = gdk_pixmap_new(
widget->window,
widget->allocation.width,
widget->allocation.height,
-1
);
} else {
priv->pixmap = g_object_ref(widget->window);
}
GTK_WIDGET_SET_FLAGS(widget, GTK_REALIZED);
{
GdkColor black = { .red = 0, .green = 0, .blue = 0 };
priv->gc = gdk_gc_new(widget->window);
gdk_rgb_find_color(
gdk_drawable_get_colormap(widget->window),
&black
);
gdk_gc_set_foreground(priv->gc, &black);
}
priv->xftdraw = XftDrawCreate(
GDK_DISPLAY_XDISPLAY(display),
GDK_DRAWABLE_XID(priv->pixmap),
GDK_VISUAL_XVISUAL(visual),
GDK_COLORMAP_XCOLORMAP(colormap)
);
for (i = 0; i < TEMU_SCREEN_MAX_COLORS; i++) {
XRenderColor rcolor = {
.red = (colors[i][0] << 8) | colors[i][0],
.green = (colors[i][1] << 8) | colors[i][1],
.blue = (colors[i][2] << 8) | colors[i][2],
.alpha = 0xffff
};
XftColorAllocValue(
GDK_DISPLAY_XDISPLAY(display),
GDK_VISUAL_XVISUAL(visual),
GDK_COLORMAP_XCOLORMAP(colormap),
&rcolor,
&priv->color[i]
);
priv->gdk_color[i].red = rcolor.red;
priv->gdk_color[i].green = rcolor.green;
priv->gdk_color[i].blue = rcolor.blue;
gdk_rgb_find_color(colormap, &priv->gdk_color[i]);
}
temu_screen_set_font_description(screen, priv->fontdesc);
urect = &priv->update_rect;
urect->x = urect->y = 0;
urect->width = priv->width;
urect->height = priv->height;
temu_screen_apply_updates(screen);
gtk_widget_queue_draw(widget);
}
static void temu_screen_unrealize(GtkWidget *widget)
{
TemuScreen *screen = TEMU_SCREEN(widget);
TemuScreenPrivate *priv = screen->priv;
gint i;
GdkDisplay *display = gtk_widget_get_display(widget);
GdkVisual *visual = gtk_widget_get_visual(widget);
GdkColormap *colormap = gtk_widget_get_colormap(widget);
if (priv->idle_id) {
g_source_remove(priv->idle_id);
priv->idle_id = 0;
}
if (widget->window) {
gdk_window_hide(widget->window);
gdk_window_destroy(widget->window);
widget->window = NULL;
}
if (priv->xftdraw) {
XftDrawDestroy(priv->xftdraw);
for (i = 0; i < TEMU_SCREEN_MAX_COLORS; i++) {
XftColorFree(
GDK_DISPLAY_XDISPLAY(display),
GDK_VISUAL_XVISUAL(visual),
GDK_COLORMAP_XCOLORMAP(colormap),
&priv->color[i]
);
}
priv->xftdraw = NULL;
}
if (priv->cursor_bar) {
gdk_cursor_unref (priv->cursor_bar);
priv->cursor_bar = NULL;
}
if (priv->cursor_dot) {
gdk_cursor_unref (priv->cursor_dot);
priv->cursor_dot = NULL;
}
if (priv->pixmap) {
g_object_unref(priv->pixmap);
priv->pixmap = NULL;
}
if (priv->gcache) {
glyph_cache_destroy(priv->gcache);
priv->gcache = NULL;
}
if (priv->gc) {
g_object_unref(G_OBJECT(priv->gc));
priv->gc = NULL;
}
GTK_WIDGET_UNSET_FLAGS(widget, GTK_REALIZED);
}
static void temu_screen_destroy(GtkObject *object)
{
GtkWidget *widget;
GtkWidgetClass *widget_class;
TemuScreen *screen;
TemuScreenPrivate *priv;
gint i;
widget = GTK_WIDGET(object);
screen = TEMU_SCREEN(object);
priv = screen->priv;
if (!priv)
goto destroy_chain;
printf("Destroying priv %p for screen %p\n", priv, screen);
/* cell screen */
for (i = 0; i < priv->height; i++)
g_free(priv->lines[i].c);
g_free(priv->lines);
{
gpointer move;
while ((move = g_trash_stack_pop(&priv->moves_free))) {
g_slice_free(TScreenMove, move);
}
}
{
TScreenMove *move, *next;
for (move = priv->moves.next; move && move != &priv->moves; move = next) {
next = move->next;
g_slice_free(TScreenMove, move);
}
}
if (priv->update_region)
gdk_region_destroy(priv->update_region);
/* options */
pango_font_description_free(priv->fontdesc);
/* on-screen/realized */
temu_screen_unrealize(widget);
g_free(priv);
screen->priv = NULL;
destroy_chain:
widget_class = g_type_class_peek(GTK_TYPE_WIDGET);
if (GTK_OBJECT_CLASS(widget_class)->destroy) {
(GTK_OBJECT_CLASS(widget_class))->destroy(object);
}
}
static void temu_screen_size_request(GtkWidget *widget, GtkRequisition *requisition)
{
TemuScreen *screen;
TemuScreenPrivate *priv;
screen = TEMU_SCREEN(widget);
priv = screen->priv;
requisition->width = priv->width * screen->font_width;
requisition->height = priv->visible_height * screen->font_height;
}
static void temu_screen_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
{
TemuScreen *screen;
TemuScreenPrivate *priv;
glong width, height;
if (!GTK_WIDGET_REALIZED(widget))
return;
screen = TEMU_SCREEN(widget);
priv = screen->priv;
if (!screen->font_width || !screen->font_height) {
width = height = 0;
} else {
width = allocation->width / screen->font_width;
height = allocation->height / screen->font_height;
}
priv->visible_height = height;
temu_screen_resize(screen, width, height);
widget->allocation = *allocation;
gdk_window_move_resize(
widget->window,
allocation->x,
allocation->y,
allocation->width,
allocation->height
);
}
/*
* Selections
*/
/* They're implemented like this, because it's easier to handle
scrolling and such. */
void temu_screen_select_clear(TemuScreen *screen)
{
TemuScreenPrivate *priv = screen->priv;
gint y, x;
if (!priv->selected)
return;
for (y = 0; y < priv->height; y++) {
if (!priv->lines[y].attr.selected)
continue;
priv->lines[y].attr.selected = 0;
for (x = 0; x < priv->width; x++) {
priv->lines[y].c[x].attr.selected = 0;
temu_screen_invalidate_cell(screen, x, y);
}
}
priv->selected = FALSE;
temu_screen_apply_updates(screen);
}
gboolean temu_screen_isbreak (TemuScreen *screen, temu_cell_t c0, temu_cell_t c1)
{
if (c0.attr.wide)
return FALSE;
if (g_unichar_type (c0.ch.glyph) == g_unichar_type (c1.ch.glyph))
return FALSE;
if (g_unichar_isalnum (c0.ch.glyph) && g_unichar_isalnum(c1.ch.glyph))
return FALSE;
return TRUE;
}
void temu_screen_select(TemuScreen *screen, gint fx, gint fy, gint tx, gint ty, gint clicks) {
GtkWidget *widget = GTK_WIDGET(screen);
TemuScreenPrivate *priv = screen->priv;
gint lines, buf_len;
gint x, y;
gchar *buffer, *p;
GtkClipboard *clipboard;
g_return_if_fail(fx >= 0 && fx < priv->width && fy >= 0 && fy < priv->visible_height);
g_return_if_fail(tx >= 0 && tx < priv->width && ty >= 0 && ty < priv->visible_height);
g_assert(clicks < 3);
temu_screen_select_clear(screen);
if (ty < fy) {
gint tmp;
tmp = fx; fx = tx; tx = tmp;
tmp = fy; fy = ty; ty = tmp;
} else if (ty == fy && tx < fx) {
gint tmp;
tmp = fx; fx = tx; tx = tmp;
}
lines = ty - fy + 1;
fy = (fy + priv->scroll_offset + priv->view_offset + priv->height) % priv->height;
ty = (ty + priv->scroll_offset + priv->view_offset + priv->height) % priv->height;
switch (clicks) {
case 0: /* 1 click - character selection */
break;
case 1: /* 2 clicks - word selection */
while (fx > 0 && !temu_screen_isbreak (screen, priv->lines[fy].c[fx - 1], priv->lines[fy].c[fx]))
fx--;
break;
case 2: /* 3 clicks - line selection */
fx = 0;
break;
}
if (fx > priv->lines[fy].len) {
fx = priv->lines[fy].len;
}
/* Slurp up whole double-width char at start */
if (fx > 0 && priv->lines[fy].c[fx-1].attr.wide) {
fx--;
}
switch (clicks) {
case 0: /* 1 click - character selection */
break;
case 1: /* 2 clicks - word selection */
while (tx < (priv->lines[ty].len-1) && !temu_screen_isbreak (screen, priv->lines[ty].c[tx], priv->lines[ty].c[tx + 1]))
tx++;
break;
case 2: /* 3 clicks - line selection */
tx = priv->width - 1;
break;
}
if (tx >= priv->lines[ty].len) {
tx = priv->width - 1;
}
/* Slurp up whole double-width char at end */
if (tx < (priv->width-1) && priv->lines[ty].c[tx].attr.wide) {
tx++;
}
buf_len = lines*priv->width*6 /* utf-8 chars, overkill alloc :x */
+lines /* newlines for non-wrapped lines */
+1; /* NUL */
p = buffer = g_alloca(buf_len);
for (y = fy, x = fx; y != ty || x <= tx; ) {
if (!( (p - buffer + 6 + 1) < (buf_len) )) {
g_assert((p - buffer + 6 + 1) < (buf_len));
}
if (x < priv->lines[y].len
&& (x <= 0 || !priv->lines[y].c[x-1].attr.wide)
&& g_unichar_validate(priv->lines[y].c[x].ch.glyph)) {
p += g_unichar_to_utf8(priv->lines[y].c[x].ch.glyph, p);
}
priv->lines[y].c[x].attr.selected = 1;
temu_screen_invalidate_cell(screen, x, y);
x++;
if (x >= priv->width) {
/*
* Behold, great evil.
*
* Don't copy trailing spaces of a line, at least not if we copy
* the newline.
*
* This really should happen above in the whole end of line check
* stuff, but I can't be bothered right now, maybe later.
*/
if (!priv->lines[y].attr.wrapped) {
while (*--p == ' ');
*++p = '\n';
p++;
}
if (y == ty)
break;
x = 0;
priv->lines[y].attr.selected = 1;
y = (y + 1) % priv->height;
}
}
priv->lines[ty].attr.selected = 1;
*p = '\0';
if (GTK_WIDGET_REALIZED(widget)) {
clipboard = gtk_clipboard_get_for_display(gtk_widget_get_display(widget), GDK_SELECTION_PRIMARY);
} else {
clipboard = gtk_clipboard_get(GDK_SELECTION_PRIMARY); /* wing it */
}
gtk_clipboard_set_text(clipboard, buffer, p - buffer);
strncpy(priv->cur_selection, buffer, MIN(p - buffer, sizeof(priv->cur_selection) - 1));
priv->cur_selection[sizeof(priv->cur_selection) - 1] = '\0';
priv->selected = TRUE;
temu_screen_apply_updates(screen);
}
void temu_screen_show_pointer (TemuScreen *screen)
{
TemuScreenPrivate *priv = screen->priv;
if (priv->cursor_current != priv->cursor_bar) {
gdk_window_set_cursor (GTK_WIDGET(screen)->window, priv->cursor_bar);
priv->cursor_current = priv->cursor_bar;
}
}
void temu_screen_hide_pointer (TemuScreen *screen)
{
TemuScreenPrivate *priv = screen->priv;
if (priv->cursor_current != priv->cursor_dot) {
gdk_window_set_cursor (GTK_WIDGET(screen)->window, priv->cursor_dot);
priv->cursor_current = priv->cursor_dot;
}
}
static gboolean temu_screen_button_press_event(GtkWidget *widget, GdkEventButton *event)
{
TemuScreen *screen = TEMU_SCREEN(widget);
TemuScreenPrivate *priv = screen->priv;
GTimeVal time;
temu_screen_show_pointer (screen);
if ((event->button != 1 && event->button != 3)
|| event->type != GDK_BUTTON_PRESS)
return FALSE;
g_get_current_time (&time);
// XXX: Assumes that time never goes backwards.
time.tv_sec -= priv->last_click.tv_sec;
time.tv_usec -= priv->last_click.tv_usec;
if (time.tv_usec < 0) {
time.tv_sec--;
time.tv_usec += 1000000;
}
g_get_current_time (&priv->last_click);
if (time.tv_sec || time.tv_usec >= 250000)
priv->clicks = 0;
else
priv->clicks++;
priv->clicks %= 3;
temu_screen_select_clear(screen);
if (event->button == 1) {
priv->select_x = event->x / screen->font_width;
priv->select_y = event->y / screen->font_height;
if (priv->clicks)
temu_screen_select(screen, priv->select_x, priv->select_y, priv->select_x, priv->select_y, priv->clicks);
} else {
gint tx, ty;
if (priv->select_x == -1)
return FALSE;
tx = event->x / screen->font_width;
if (tx < 0) tx = 0;
else if (tx >= priv->width) tx = priv->width-1;
ty = event->y / screen->font_height;
if (ty < 0) ty = 0;
else if (ty >= priv->visible_height) ty = priv->visible_height-1;
temu_screen_select(screen, priv->select_x, priv->select_y, tx, ty, priv->clicks);
}
return TRUE;
}
static gboolean temu_screen_button_motion_event(GtkWidget *widget, GdkEventMotion *event)
{
TemuScreen *screen = TEMU_SCREEN(widget);
TemuScreenPrivate *priv = screen->priv;
gint tx, ty;
temu_screen_show_pointer (screen);
if (!(event->state & GDK_BUTTON1_MASK))
return FALSE;
if (priv->select_x == -1)
return FALSE;
tx = event->x / screen->font_width;
if (tx < 0) tx = 0;
else if (tx >= priv->width) tx = priv->width-1;
ty = event->y / screen->font_height;
if (ty < 0) ty = 0;
else if (ty >= priv->visible_height) ty = priv->visible_height-1;
temu_screen_select(
screen,
priv->select_x, priv->select_y,
tx, ty, priv->clicks
);
return TRUE;
}
static gboolean temu_screen_button_release_event(GtkWidget *widget, GdkEventButton *event)
{
temu_screen_show_pointer (TEMU_SCREEN(widget));
return TRUE;
}
/*
* Internal low-level screen management
*/
/* resize */
static void temu_screen_resize(TemuScreen *screen, gint width, gint height)
{
GtkWidget *widget = GTK_WIDGET(screen);
TemuScreenPrivate *priv = screen->priv;
gint old_width, old_height;
gint min_top;
gint i;
old_width = priv->width;
old_height = priv->height;
height = height * 6;
if (old_height != height) {
priv->height = height;
priv->lines = g_realloc(priv->lines, height * sizeof(*priv->lines));
for (i = old_height; i < height; i++) {
memset (&priv->lines[i], 0, sizeof (priv->lines[i]));
memset (&priv->lines[i].attr, 0, sizeof(temu_line_attr_t));
priv->lines[i].len = 0;
priv->lines[i].c = g_malloc0(priv->width*sizeof(*priv->lines[i].c));
}
#if 1
if (priv->height > old_height) {
// printf("priv->height %d, old_height %d, x 0, y %d, w %d, h %d\n", priv->height, old_height, old_height, priv->width, (priv->height - old_height));
temu_screen_fill_rect_internal(
screen,
0, old_height,
priv->width, (priv->height - old_height),
&priv->resize_cell
);
}
#endif
}
if (old_width != width) {
priv->width = width;
for (i = 0; i < priv->height; i++) {
priv->lines[i].c = g_realloc(priv->lines[i].c, width*sizeof(*priv->lines[i].c));
}
#if 1
temu_screen_fill_rect_internal(
screen,
old_width, 0,
(priv->width - old_width), priv->height,
&priv->resize_cell
);
#endif
}
/* Update top of scroll buffer */
min_top = priv->scroll_offset + priv->visible_height;
if (priv->scroll_top <= priv->scroll_offset)
min_top -= priv->height;
if (min_top > priv->scroll_top)
priv->scroll_top = (min_top + priv->height) % priv->height;
/* Resize the back buffer */
if (priv->double_buffered && GTK_WIDGET_REALIZED(widget)) {
GdkPixmap *new_pixmap;
new_pixmap = gdk_pixmap_new(
widget->window,
priv->width * screen->font_width,
priv->visible_height * screen->font_height,
-1
);
gdk_draw_drawable(
new_pixmap,
priv->gc,
priv->pixmap,
0, 0, 0, 0,
priv->width * screen->font_width,
priv->visible_height * screen->font_height
);
g_object_unref(priv->pixmap);
priv->pixmap = new_pixmap;
XftDrawChange(priv->xftdraw, GDK_DRAWABLE_XID(priv->pixmap));
}
printf("Resized! %dx%d -> %dx%d, visible_height %d, scroll_top %d, scroll_offset %d\n", old_width, old_height, priv->width, priv->height, priv->visible_height, priv->scroll_top, priv->scroll_offset);
}
/* updates */
static void temu_screen_rect_scale(TemuScreen *screen, GdkRectangle *rect)
{
rect->x *= screen->font_width;
rect->y *= screen->font_height;
rect->width *= screen->font_width;
rect->height *= screen->font_height;
}
static gboolean temu_screen_idle_func(gpointer data)
{
TemuScreen *screen = TEMU_SCREEN(data);
TemuScreenPrivate *priv = screen->priv;
GtkWidget *widget = GTK_WIDGET(screen);
priv->idle_id = 0;
if (!widget->window)
return FALSE;
if (priv->update_region || priv->moves.next != &priv->moves) {
GdkEvent event;
event.expose.type = GDK_EXPOSE;
event.expose.window = g_object_ref(widget->window);
event.expose.count = 0;
event.expose.region = gdk_region_new();
temu_screen_expose (widget, &event.expose);
gdk_region_destroy(event.expose.region);
g_object_unref(widget->window);
}
return FALSE;
}
static void temu_screen_schedule_update(TemuScreen *screen)
{
TemuScreenPrivate *priv = screen->priv;
if (!priv->idle_id)
priv->idle_id = g_timeout_add_full(
G_PRIORITY_LOW,
TEMU_SCREEN_UPDATE_DELAY_MS,
temu_screen_idle_func,
screen,
NULL
);
}
static void temu_screen_invalidate_cell(TemuScreen *screen, gint x, gint y)
{
TemuScreenPrivate *priv = screen->priv;
y -= priv->scroll_offset + priv->view_offset;
while (y < 0) y += priv->height;
while (y >= priv->height) y -= priv->height;
if (!priv->update_rect.width) {
priv->update_rect.x = x;
priv->update_rect.y = y;
priv->update_rect.width = 1;
priv->update_rect.height = 1;
return;
}
if (x < priv->update_rect.x) {
priv->update_rect.width += priv->update_rect.x - x;
priv->update_rect.x = x;
} else if (x >= (priv->update_rect.x + priv->update_rect.width)) {
priv->update_rect.width = (x - priv->update_rect.x + 1);
}
if (y < priv->update_rect.y) {
priv->update_rect.height += priv->update_rect.y - y;
priv->update_rect.y = y;
} else if (y >= (priv->update_rect.y + priv->update_rect.height)) {
priv->update_rect.height = (y - priv->update_rect.y + 1);
}
}
static void temu_screen_apply_updates(TemuScreen *screen)
{
TemuScreenPrivate *priv = screen->priv;
GdkRectangle *urect = &priv->update_rect;
if (!urect->width)
return;
temu_screen_rect_scale(screen, urect);
if (!priv->update_region)
priv->update_region = gdk_region_new();
gdk_region_union_with_rect(priv->update_region, urect);
temu_screen_schedule_update(screen);
/**/
urect->width = 0;
}
static gboolean temu_screen_batch_move(TemuScreen *screen, GdkRectangle *rect, gint dx, gint dy)
{
TemuScreenPrivate *priv = screen->priv;
TScreenMove *prev = priv->moves.prev;
GdkRectangle clear_rect;
gint sw = priv->width * screen->font_width;
gint sh = priv->height * screen->font_height;
if (
(prev->base.x == rect->x) &&
(prev->base.y == rect->y) &&
(prev->base.width == rect->width) &&
(prev->base.height == rect->height)
) {
/* Yay, we can batch it! */
if (dx < 0)
prev->rect.x -= dx;
prev->rect.width -= abs(dx);
if (dy < 0)
prev->rect.y -= dy;
prev->rect.height -= abs(dy);
prev->dx += dx;
prev->dy += dy;
return TRUE;
}
/* Make sure this rect scrolls the -entire- region */
if (dx) {
if (prev->rect.x < rect->x)
return FALSE;
if ((prev->rect.x+prev->rect.width) > (rect->x+rect->width))
return FALSE;
}
if (dy) {
if (prev->rect.y < rect->y)
return FALSE;
if ((prev->rect.y+prev->rect.height) > (rect->y+rect->height))
return FALSE;
}
/* This junk basically checks to see if either stuff got scrolled
off (and thus, does not matter), or this new region encompases
the old one (and thus, scrolls the scrolled stuff) */