#include <X11/extensions/XTest.h>
#include <X11/keysym.h>
-#define NUM_PAGES 25
+CanonImage *page_images[MAX_PAGES];
+int npages;
+static Window id;
static Display *disp;
+static struct timeval tv_startup;
static KeyCode keycode(KeySym sym) {
return XKeysymToKeycode(disp,sym);
}
-static CanonImage *screenshot_now(Window id) {
+static void check_pclose(FILE *f, char *cmd) {
+ int r;
+ eassert(!ferror(f));
+ r= fgetc(f); eassert(r==EOF); eassert(feof(f));
+ r= pclose(f); eassert(r>=0); eassert(WIFEXITED(r) && !WEXITSTATUS(r));
+ free(cmd);
+}
+
+#if 0
+static CanonImage *screenshot_now(void) {
char *cmd;
CanonImage *ci;
int r;
eassert(r>=0);
FILE *f= popen(cmd,"r"); eassert(f);
ci= file_read_image(f);
- r= fgetc(f); eassert(r==EOF); eassert(feof(f));
- r= pclose(f); eassert(r>=0); eassert(WIFEXITED(r) && !WEXITSTATUS(r));
- free(cmd);
+ check_pclose(f, cmd);
return ci;
}
+#endif
+
+static void screenshot_startup(void) {
+ int r;
+ disp= XOpenDisplay(0); eassert(disp);
+ r= gettimeofday(&tv_startup,0); eassert(!r);
+}
+
+#if 0
+static CanonImage *single_page(void) {
+ int r;
+ r= XRaiseWindow(disp, id); eassert(r);
+ r= XSync(disp, False); eassert(r);
+ return screenshot_now();
+}
+#endif
+
+/*---------- pager ----------*/
+
+typedef struct {
+ size_t len;
+ unsigned char d[];
+} Snapshot;
+
+static size_t snapshot_alloc= 1024;
+static double last_input;
+static const double min_update_allowance= 0.5;
+
+static double timestamp(void) {
+ struct timeval tv;
+ int r;
+
+ r= gettimeofday(&tv,0); eassert(!r);
+ double t= (tv.tv_sec - tv_startup.tv_sec) +
+ (tv.tv_usec - tv_startup.tv_usec) * 1e-6;
+ fprintf(stderr,"%f\n",t);
+ return t;
+}
+static void delay(double need_sleep) {
+ int r;
+ fprintf(stderr,"PAGING delay %f\n",need_sleep);
+ r= usleep(need_sleep * 1e6); eassert(!r);
+}
+
+static void sync_after_input(void) {
+ int r;
+ r= XSync(disp, False); eassert(r);
+ last_input= timestamp();
+}
+
+static void send_key(KeySym sym) {
+ XTestFakeKeyEvent(disp, keycode(sym),1, 10);
+ XTestFakeKeyEvent(disp, keycode(sym),0, 10);
+}
+
+static void send_pgup_many(void) {
+ int i;
+ for (i=0; i<25; i++)
+ send_key(XK_Prior);
+ fprintf(stderr,"PAGING PageUp x %d\n",i);
+ sync_after_input();
+}
+static void send_pgdown(void) {
+ send_key(XK_Next);
+ fprintf(stderr,"PAGING PageDown\n");
+ sync_after_input();
+}
+
+static void snapshot(Snapshot **output) {
+ char *cmd;
+ int r;
+
+ free(*output); *output=0;
+
+ fprintf(stderr,"PAGING snapshot\n");
+
+ r= asprintf(&cmd, "xwd -silent -id 0x%lx", (unsigned long)id); eassert(r>=0);
+ FILE *f= popen(cmd,"r"); eassert(f);
+
+ int need_alloc=1;
+ size_t used=0;
+ for (;;) {
+ size_t allow= snapshot_alloc - used;
+ if (!allow) {
+ snapshot_alloc <<= 1;
+ need_alloc= 1;
+ fprintf(stderr,"PAGING snapshot grow %ld\n", (long)snapshot_alloc);
+ continue;
+ }
+ if (need_alloc) {
+ *output= realloc(*output, sizeof(**output) + snapshot_alloc);
+ eassert(*output);
+ need_alloc= 0;
+ }
+ size_t got= fread((*output)->d, 1, allow, f);
+ if (got==0) break;
+ used += got;
+ }
+ check_pclose(f,cmd);
+
+ (*output)->len= used;
+ snapshot_alloc= used+1;
+ *output= realloc(*output, sizeof(**output) + snapshot_alloc);
+ eassert(*output);
+
+ fprintf(stderr,"PAGING snapshot len=%ld\n", (long)used);
+}
+
+static int identical(const Snapshot *a, const Snapshot *b) {
+ return !(memcmp(a, b, sizeof(*a)) ||
+ memcmp(a->d, b->d, a->len));
+}
+
+static void wait_for_stability(Snapshot **output,
+ const Snapshot *previously,
+ void (*with_keypress)(void)) {
+ Snapshot *last=0;
+ /* waits longer if we're going to return an image identical to previously
+ * if previously==0, all images are considered identical to it */
+
+ fprintf(stderr,"PAGING wait_for_stability"
+ " last_input=%f previously=%p\n",
+ last_input, previously);
+
+ for (;;) {
+ double at_snapshot= timestamp();
+ double need_sleep= min_update_allowance - (at_snapshot - last_input);
+ if (need_sleep > 0) { delay(need_sleep); continue; }
+
+ snapshot(output);
+
+ if (!with_keypress &&
+ !(previously && identical(*output,previously))) {
+ fprintf(stderr,"PAGING wait_for_stability simple\n");
+ break;
+ }
+
+ if (last && identical(*output,last)) {
+ fprintf(stderr,"PAGING wait_for_stability stabilised\n");
+ break;
+ }
+
+ fprintf(stderr,"PAGING wait_for_stability retry\n");
+
+ free(last); last=*output; *output=0;
+
+ if (with_keypress)
+ with_keypress();
-static void read_pages(Window id) {
+ delay(0.5);
+ }
+
+ free(last);
+ fprintf(stderr,"PAGING wait_for_stability done.\n");
+}
+
+static void raise_and_set_focus(void) {
int r;
XWindowAttributes attr;
int xpos,ypos, evbase,errbase,majver,minver;
unsigned width,height,bd,depth;
Window dummy;
- disp= XOpenDisplay(0); eassert(disp);
+ fprintf(stderr,"PAGING raise_and_set_focus\n");
r= XTestQueryExtension(disp, &evbase,&errbase,&majver,&minver);
eassert(r==True);
int screen= XScreenNumberOfScreen(attr.screen);
XTestFakeMotionEvent(disp,screen, xpos, ypos, 0);
- XTestFakeButtonEvent(disp,1,1, 0);
+ XTestFakeButtonEvent(disp,1,1, 50);
XTestFakeButtonEvent(disp,1,0, 50);
- XTestFakeKeyEvent(disp, keycode(XK_Next),1, 50);
- XTestFakeKeyEvent(disp, keycode(XK_Next),0, 50);
-
- r= XSync(disp, False); eassert(r);
+ sync_after_input();
+ fprintf(stderr,"PAGING raise_and_set_focus done.\n");
}
+
+
+static void read_pages(void) {
+ Snapshot *current=0, *last=0;
+
+ raise_and_set_focus();
+
+ /* page to the top - keep pressing page up until the image stops changing */
+ wait_for_stability(&last,0, send_pgup_many);
+
+ /* now to actually page down */
+ for (;;) {
+ fprintf(stderr,"PAGING page %d\n",npages);
+ //eassert(npages < MAX_PAGES);
+ //page_images[npages++]=
+
+ wait_for_stability(¤t,last, 0);
+ if (npages && /* first pagedown doesn't do much */
+ identical(current,last)) {
+ free(current);
+ break;
+ }
+
+ free(last); last=current; current=0;
+
+ send_pgdown();
+ npages++;
+ }
+ fprintf(stderr,"PAGING all done.\n");
+}
+
int main(int argc, char **argv) {
- Window id;
- CanonImage *ci;
+ screenshot_startup();
id= strtoul(*++argv,0,0);
- read_pages(id);
- ci= screenshot_now(id);
+
+ read_pages();
return 0;
}
+
~yarrgweb / ypp-sc-tools.main.git / blobdiff