Merge pull request #21 from rubysolo/master

Added new sample in which steps are not all known in advance, new waitWhileSelector() method

@@ -904,6 +904,23 @@
             return this.waitFor(function(self) {
                 return self.exists(selector);
             }, then, onTimeout, timeout);
+        },
+
+        /**
+         * Waits until an element matching the provided CSS3 selector does not exist in
+         * remote DOM to process a next step.
+         *
+         * @param  String    selector   A CSS3 selector
+         * @param  Function  then       The next step to perform (optional)
+         * @param  Function  onTimeout  A callback function to call on timeout (optional)
+         * @param  Number    timeout    The max amount of time to wait, in milliseconds (optional)
+         * @return Casper
+         */
+        waitWhileSelector: function(selector, then, onTimeout, timeout) {
+            timeout = timeout ? timeout : this.defaultWaitTimeout;
+            return this.waitFor(function(self) {
+                return ! self.exists(selector);
+            }, then, onTimeout, timeout);
         }
     };
 

+# get multiple pages of google search results
+#
+#   usage:  phantomjs googlepagination.coffee my search terms
+#
+#   (all arguments will be used as the query)
+#
+phantom.injectJs('casper.js')
+
+links = []
+casper = new phantom.Casper
+
+casper.start 'http://google.com', ->
+  @fill 'form[name=f]',  q: phantom.args.join(' '), true
+  @click 'input[value="Google Search"]'
+
+casper.then ->
+  # google's being all ajaxy, wait for results to load...
+  @waitForSelector 'table#nav', ->
+    processPage = (cspr) ->
+      currentPage = Number cspr.evaluate(-> document.querySelector('table#nav td.cur').innerText), 10
+      currentPage = 1 if currentPage == 0
+      cspr.capture "google-results-p#{ currentPage }.png"
+
+      # don't go too far down the rabbit hole
+      return if currentPage >= 5
+
+      cspr.evaluate ->
+        if nextLink = document.querySelector('table#nav td.cur').nextElementSibling?.querySelector('a')
+          nextLink.setAttribute 'id', 'next-page-of-results'
+
+      nextPage = 'a#next-page-of-results'
+      if cspr.exists nextPage
+        cspr.echo 'requesting next page...'
+        cspr.thenClick(nextPage).then(processPage)
+      else
+        cspr.echo "that's all, folks."
+
+    processPage(casper)
+
+casper.run -> @exit()