ppapi/examples/file_chooser/file_chooser.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
   6 #include "ppapi/c/pp_input_event.h"
   7 #include "ppapi/cpp/completion_callback.h"
   8 #include "ppapi/cpp/dev/file_chooser_dev.h"
   9 #include "ppapi/cpp/file_ref.h"
  10 #include "ppapi/cpp/input_event.h"
  11 #include "ppapi/cpp/module.h"
  12 #include "ppapi/cpp/private/instance_private.h"
  13 #include "ppapi/cpp/private/var_private.h"
  14 #include "ppapi/utility/completion_callback_factory.h"
  15
  16 class MyInstance : public pp::InstancePrivate {
  17  public:
  18   MyInstance(PP_Instance instance)
  19       : pp::InstancePrivate(instance) {
  20     callback_factory_.Initialize(this);
  21     RequestInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
  22   }
  23
  24   virtual bool HandleInputEvent(const pp::InputEvent& event) {
  25     switch (event.GetType()) {
  26       case PP_INPUTEVENT_TYPE_MOUSEDOWN: {
  27         pp::MouseInputEvent mouse_event(event);
  28         if (mouse_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT)
  29           ShowFileChooser(false);
  30         else if (mouse_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_RIGHT)
  31           ShowFileChooser(true);
  32         else
  33           return false;
  34
  35         return true;
  36       }
  37       default:
  38         return false;
  39     }
  40   }
  41
  42  private:
  43   void ShowFileChooser(bool multi_select) {
  44     RecreateConsole();
  45
  46     PP_FileChooserMode_Dev mode =
  47         (multi_select ? PP_FILECHOOSERMODE_OPENMULTIPLE
  48                       : PP_FILECHOOSERMODE_OPEN);
  49     std::string accept_types = (multi_select ? "" : "text/plain");
  50
  51     chooser_ = pp::FileChooser_Dev(this, mode, accept_types);
  52     chooser_.Show(callback_factory_.NewCallbackWithOutput(
  53         &MyInstance::ShowSelectedFileNames));
  54   }
  55
  56   void ShowSelectedFileNames(int32_t result,
  57                              const std::vector<pp::FileRef>& files) {
  58     if (result != PP_OK)
  59       return;
  60     for (size_t i = 0; i < files.size(); i++)
  61       Log(files[i].GetName());
  62   }
  63
  64   void RecreateConsole() {
  65     pp::VarPrivate doc = GetWindowObject().GetProperty("document");
  66     pp::VarPrivate body = doc.GetProperty("body");
  67     if (!console_.is_undefined())
  68       body.Call("removeChild", console_);
  69
  70     console_ = doc.Call("createElement", "pre");
  71     console_.SetProperty("id", "console");
  72     console_.GetProperty("style").SetProperty("backgroundColor", "lightgray");
  73     body.Call("appendChild", console_);
  74   }
  75
  76   void Log(const pp::Var& var) {
  77     pp::VarPrivate doc = GetWindowObject().GetProperty("document");
  78     console_.Call("appendChild", doc.Call("createTextNode", var));
  79     console_.Call("appendChild", doc.Call("createTextNode", "\n"));
  80   }
  81
  82   pp::FileChooser_Dev chooser_;
  83
  84   pp::CompletionCallbackFactory<MyInstance> callback_factory_;
  85   pp::VarPrivate console_;
  86 };
  87
  88 class MyModule : public pp::Module {
  89  public:
  90   MyModule() : pp::Module() {}
  91   virtual ~MyModule() {}
  92
  93   virtual pp::Instance* CreateInstance(PP_Instance instance) {
  94     return new MyInstance(instance);
  95   }
  96 };
  97
  98 namespace pp {
  99
 100 // Factory function for your specialization of the Module object.
 101 Module* CreateModule() {
 102   return new MyModule();
 103 }
 104
 105 }  // namespace pp