export slides as PNG files

reporting/markslider.py

@@ -218,6 +218,10 @@ Keyboard shortcuts:
                      help="Execute commands in `! or `> tags at show time with Enter key. WARNING: Potentially very dangerous to run others' slides with this switch!")
     parser.add_argument("-E",action="store_true",dest="execute_read",default=False,
                      help="Execute commands in $> tags at file read time. WARNING: Potentially very dangerous to run others' slides with this switch!")
+    parser.add_argument("--exit",action="store_true",dest="exit_last",default=False,
+                     help="Exit after last slide.")
+    parser.add_argument("--export",action="store",dest="screenshots",default=False,
+                        type=str, help="Take screenshots of the slideshow in the given folder.")
     parser.add_argument("-m",action="store_true",dest="autocolor",default=False,
                      help="Color by markdown structure.")
     parser.add_argument("--no-color","-n",action="store_false",dest="color",default=True,
@@ -240,6 +244,10 @@ Keyboard shortcuts:
                      help="File to show")
     opts=parser.parse_args()
     opts.slideShow=not not opts.slideTimer
+    if opts.screenshots:
+        opts.slideShow=True
+        opts.slideTimer=1
+        opts.exit_last=True
     return opts
 
 def page_print(reader,opts,offset):
@@ -279,6 +287,7 @@ def page_print(reader,opts,offset):
             break
         r+=row_lines+1
         sys.stdout.write("\n")
+    sys.stdout.flush()
     return
 
 def menu_print(reader,opts):
@@ -338,6 +347,9 @@ def browser(opts,filename):
             if opts.menu:
                 menu_print(reader,opts)
             sys.stdout.write(bc.pos(opts.size[0], opts.size[1]))
+            sys.stdout.flush()
+            if opts.screenshots:
+                take_screenshot(reader,opts)
             while 1:
                 if opts.slideTimer and opts.slideShow:
                     signal.signal(signal.SIGALRM, timeouthandler)
@@ -345,6 +357,9 @@ def browser(opts,filename):
                 inkey=getkeypress()
                 signal.alarm(0)
                 if not inkey and opts.slideShow:
+                    if opts.exit_last:
+                        if reader.page+1==reader.pages:
+                            return
                     reader.inc_page_no(1,True)
                     offset=(0,0)
                     break
@@ -353,6 +368,9 @@ def browser(opts,filename):
                     #print('Exited in: ')
                     return                
                 if inkey in [67,54,32]: # PGDN or space
+                    if opts.exit_last:
+                        if reader.page+1==reader.pages:
+                            return
                     reader.inc_page_no(1)
                     offset=(0, 0)
                 if inkey in [68,53,127]:
@@ -385,6 +403,7 @@ def browser(opts,filename):
                     launch(reader,opts,offset)
                 break
         
+        
     except IOError:
         pass
     except KeyboardInterrupt:
@@ -472,6 +491,14 @@ def launch(reader,opts,offset):
                         shell=True)
         return
     return 
+    
+def take_screenshot(reader,opts):
+    out_file=os.path.join(opts.screenshots,"slide%03d.png"%(reader.page+1))
+    if not os.path.exists(opts.screenshots):
+        os.mkdir(opts.screenshots)
+    subprocess.call("sleep 0.5; import -window $WINDOWID '%s'"%(out_file,), 
+                        stdout=subprocess.PIPE,stderr=subprocess.PIPE,
+                        shell=True)
 bc=ansi.code()
 getch=getch()
 opts=setup_options()