third_party/WebKit/Source/bindings/templates/callback_interface.cpp

   1 {% include 'copyright_block.txt' %}
   2 #include "config.h"
   3 {% filter conditional(conditional_string) %}
   4 #include "{{v8_class}}.h"
   5
   6 {% for filename in cpp_includes %}
   7 #include "{{filename}}"
   8 {% endfor %}
   9
  10 namespace blink {
  11
  12 {{v8_class}}::{{v8_class}}(v8::Local<v8::Function> callback, ScriptState* scriptState)
  13     : ActiveDOMCallback(scriptState->executionContext())
  14     , m_scriptState(scriptState)
  15 {
  16     m_callback.set(scriptState->isolate(), callback);
  17 }
  18
  19 {{v8_class}}::~{{v8_class}}()
  20 {
  21 }
  22
  23 DEFINE_TRACE({{v8_class}})
  24 {
  25     {{cpp_class}}::trace(visitor);
  26     ActiveDOMCallback::trace(visitor);
  27 }
  28
  29 {% for method in methods if not method.is_custom %}
  30 {{method.cpp_type}} {{v8_class}}::{{method.name}}({{method.argument_declarations | join(', ')}})
  31 {
  32     {% set return_default = 'return true'
  33            if method.idl_type == 'boolean' else 'return' %}{# void #}
  34     if (!canInvokeCallback())
  35         {{return_default}};
  36
  37     if (!m_scriptState->contextIsValid())
  38         {{return_default}};
  39
  40     ScriptState::Scope scope(m_scriptState.get());
  41     {% if method.call_with_this_handle %}
  42     v8::Local<v8::Value> thisHandle = thisValue.v8Value();
  43     if (thisHandle.IsEmpty()) {
  44         if (!isScriptControllerTerminating())
  45             CRASH();
  46         {{return_default}};
  47     }
  48     {% endif %}
  49     {% for argument in method.arguments %}
  50     v8::Local<v8::Value> {{argument.handle}} = {{argument.cpp_value_to_v8_value}};
  51     if ({{argument.handle}}.IsEmpty()) {
  52         if (!isScriptControllerTerminating())
  53             CRASH();
  54         {{return_default}};
  55     }
  56     {% endfor %}
  57     {% if method.arguments %}
  58     v8::Local<v8::Value> argv[] = { {{method.arguments | join(', ', 'handle')}} };
  59     {% else %}
  60     {# Empty array initializers are illegal, and don't compile in MSVC. #}
  61     v8::Local<v8::Value> *argv = 0;
  62     {% endif %}
  63
  64     {% set this_handle_parameter = 'thisHandle, ' if method.call_with_this_handle else 'v8::Undefined(m_scriptState->isolate()), ' %}
  65     {% if method.idl_type == 'boolean' %}
  66     v8::TryCatch exceptionCatcher;
  67     exceptionCatcher.SetVerbose(true);
  68     ScriptController::callFunction(m_scriptState->executionContext(), m_callback.newLocal(m_scriptState->isolate()), {{this_handle_parameter}}{{method.arguments | length}}, argv, m_scriptState->isolate());
  69     return !exceptionCatcher.HasCaught();
  70     {% else %}{# void #}
  71     ScriptController::callFunction(m_scriptState->executionContext(), m_callback.newLocal(m_scriptState->isolate()), {{this_handle_parameter}}{{method.arguments | length}}, argv, m_scriptState->isolate());
  72     {% endif %}
  73 }
  74
  75 {% endfor %}
  76 } // namespace blink
  77 {% endfilter %}