event_source.cc revision effb81e5f8246d0db0270817048dc992db66e9fb
1a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 2a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)// found in the LICENSE file. 4a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 5a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#include "ui/events/event_source.h" 6a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 7effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch#include <algorithm> 8effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 9a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#include "ui/events/event_processor.h" 10effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch#include "ui/events/event_rewriter.h" 11a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 12a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)namespace ui { 13a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 14effb81e5f8246d0db0270817048dc992db66e9fbBen MurdochEventSource::EventSource() {} 15effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 16effb81e5f8246d0db0270817048dc992db66e9fbBen MurdochEventSource::~EventSource() {} 17effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 18effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochvoid EventSource::AddEventRewriter(EventRewriter* rewriter) { 19effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch DCHECK(rewriter); 20effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch DCHECK(rewriter_list_.end() == 21effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch std::find(rewriter_list_.begin(), rewriter_list_.end(), rewriter)); 22effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch rewriter_list_.push_back(rewriter); 23effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 24effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 25effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochvoid EventSource::RemoveEventRewriter(EventRewriter* rewriter) { 26effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch EventRewriterList::iterator find = 27effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch std::find(rewriter_list_.begin(), rewriter_list_.end(), rewriter); 28effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (find != rewriter_list_.end()) 29effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch rewriter_list_.erase(find); 30effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 31effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 325d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)EventDispatchDetails EventSource::SendEventToProcessor(Event* event) { 33effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch scoped_ptr<Event> rewritten_event; 34effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch EventRewriteStatus status = EVENT_REWRITE_CONTINUE; 35effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch EventRewriterList::const_iterator it = rewriter_list_.begin(), 36effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch end = rewriter_list_.end(); 37effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch for (; it != end; ++it) { 38effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch status = (*it)->RewriteEvent(*event, &rewritten_event); 39effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (status == EVENT_REWRITE_DISCARD) { 40effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch CHECK(!rewritten_event); 41effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch return EventDispatchDetails(); 42effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 43effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (status == EVENT_REWRITE_CONTINUE) { 44effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch CHECK(!rewritten_event); 45effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch continue; 46effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 47effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch break; 48effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 49effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch CHECK((it == end && !rewritten_event) || rewritten_event); 50effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch EventDispatchDetails details = 51effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch DeliverEventToProcessor(rewritten_event ? rewritten_event.get() : event); 52effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (details.dispatcher_destroyed) 53effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch return details; 54effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 55effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch while (status == EVENT_REWRITE_DISPATCH_ANOTHER) { 56effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch scoped_ptr<Event> new_event; 57effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch status = (*it)->NextDispatchEvent(*rewritten_event, &new_event); 58effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (status == EVENT_REWRITE_DISCARD) 59effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch return EventDispatchDetails(); 60effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch CHECK_NE(EVENT_REWRITE_CONTINUE, status); 61effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch CHECK(new_event); 62effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch details = DeliverEventToProcessor(new_event.get()); 63effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (details.dispatcher_destroyed) 64effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch return details; 65effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch rewritten_event.reset(new_event.release()); 66effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 67effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch return EventDispatchDetails(); 68effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 69effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 70effb81e5f8246d0db0270817048dc992db66e9fbBen MurdochEventDispatchDetails EventSource::DeliverEventToProcessor(Event* event) { 71a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) EventProcessor* processor = GetEventProcessor(); 72a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) CHECK(processor); 735d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return processor->OnEventFromSource(event); 74a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 75a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 76a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} // namespace ui 77