OutOfProcessWebView.cpp 11 KB

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  1. /*
  2. * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
  3. * All rights reserved.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions are met:
  7. *
  8. * 1. Redistributions of source code must retain the above copyright notice, this
  9. * list of conditions and the following disclaimer.
  10. *
  11. * 2. Redistributions in binary form must reproduce the above copyright notice,
  12. * this list of conditions and the following disclaimer in the documentation
  13. * and/or other materials provided with the distribution.
  14. *
  15. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  16. * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18. * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  19. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21. * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22. * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  23. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25. */
  26. #include "OutOfProcessWebView.h"
  27. #include "WebContentClient.h"
  28. #include <AK/String.h>
  29. #include <AK/URLParser.h>
  30. #include <LibGUI/MessageBox.h>
  31. #include <LibGUI/Painter.h>
  32. #include <LibGUI/ScrollBar.h>
  33. #include <LibGUI/Window.h>
  34. #include <LibGfx/Palette.h>
  35. #include <LibGfx/SystemTheme.h>
  36. REGISTER_WIDGET(Web, OutOfProcessWebView)
  37. namespace Web {
  38. OutOfProcessWebView::OutOfProcessWebView()
  39. {
  40. set_should_hide_unnecessary_scrollbars(true);
  41. set_focus_policy(GUI::FocusPolicy::StrongFocus);
  42. create_client();
  43. }
  44. OutOfProcessWebView::~OutOfProcessWebView()
  45. {
  46. }
  47. void OutOfProcessWebView::create_client()
  48. {
  49. m_client_state = {};
  50. m_client_state.client = WebContentClient::construct(*this);
  51. m_client_state.client->on_web_content_process_crash = [this] {
  52. create_client();
  53. ASSERT(m_client_state.client);
  54. handle_resize();
  55. StringBuilder builder;
  56. builder.append("<html><head><title>Crashed: ");
  57. builder.append(escape_html_entities(m_url.to_string()));
  58. builder.append("</title></head><body>");
  59. builder.append("<h1>Web page crashed");
  60. if (!m_url.host().is_empty()) {
  61. builder.appendff(" on {}", escape_html_entities(m_url.host()));
  62. }
  63. builder.append("</h1>");
  64. builder.appendff("The web page <a href='{}'>{}</a> has crashed.<br><br>You can reload the page to try again.", AK::urlencode(m_url.to_string()), escape_html_entities(m_url.to_string()));
  65. builder.append("</body></html>");
  66. load_html(builder.to_string(), m_url);
  67. };
  68. client().post_message(Messages::WebContentServer::UpdateSystemTheme(Gfx::current_system_theme_buffer()));
  69. }
  70. void OutOfProcessWebView::load(const URL& url)
  71. {
  72. m_url = url;
  73. client().post_message(Messages::WebContentServer::LoadURL(url));
  74. }
  75. void OutOfProcessWebView::load_html(const StringView& html, const URL& url)
  76. {
  77. m_url = url;
  78. client().post_message(Messages::WebContentServer::LoadHTML(html, url));
  79. }
  80. void OutOfProcessWebView::load_empty_document()
  81. {
  82. m_url = {};
  83. client().post_message(Messages::WebContentServer::LoadHTML("", {}));
  84. }
  85. void OutOfProcessWebView::paint_event(GUI::PaintEvent& event)
  86. {
  87. GUI::ScrollableWidget::paint_event(event);
  88. // If the available size is empty, we don't have a front or back bitmap to draw.
  89. if (available_size().is_empty())
  90. return;
  91. GUI::Painter painter(*this);
  92. painter.add_clip_rect(event.rect());
  93. if (!m_client_state.has_usable_bitmap) {
  94. painter.fill_rect(frame_inner_rect(), palette().base());
  95. return;
  96. }
  97. painter.add_clip_rect(frame_inner_rect());
  98. painter.translate(frame_thickness(), frame_thickness());
  99. ASSERT(m_client_state.front_bitmap);
  100. painter.blit({ 0, 0 }, *m_client_state.front_bitmap, m_client_state.front_bitmap->rect());
  101. }
  102. void OutOfProcessWebView::resize_event(GUI::ResizeEvent& event)
  103. {
  104. GUI::ScrollableWidget::resize_event(event);
  105. handle_resize();
  106. }
  107. void OutOfProcessWebView::handle_resize()
  108. {
  109. client().post_message(Messages::WebContentServer::SetViewportRect(Gfx::IntRect({ horizontal_scrollbar().value(), vertical_scrollbar().value() }, available_size())));
  110. if (m_client_state.front_bitmap) {
  111. m_client_state.front_bitmap = nullptr;
  112. client().post_message(Messages::WebContentServer::RemoveBackingStore(m_client_state.front_bitmap_id));
  113. }
  114. if (m_client_state.back_bitmap) {
  115. m_client_state.back_bitmap = nullptr;
  116. client().post_message(Messages::WebContentServer::RemoveBackingStore(m_client_state.back_bitmap_id));
  117. }
  118. m_client_state.front_bitmap_id = -1;
  119. m_client_state.back_bitmap_id = -1;
  120. m_client_state.has_usable_bitmap = false;
  121. if (available_size().is_empty())
  122. return;
  123. if (auto new_bitmap = Gfx::Bitmap::create_shareable(Gfx::BitmapFormat::RGB32, available_size())) {
  124. m_client_state.front_bitmap = move(new_bitmap);
  125. m_client_state.front_bitmap_id = m_client_state.next_bitmap_id++;
  126. client().post_message(Messages::WebContentServer::AddBackingStore(m_client_state.front_bitmap_id, m_client_state.front_bitmap->to_shareable_bitmap()));
  127. }
  128. if (auto new_bitmap = Gfx::Bitmap::create_shareable(Gfx::BitmapFormat::RGB32, available_size())) {
  129. m_client_state.back_bitmap = move(new_bitmap);
  130. m_client_state.back_bitmap_id = m_client_state.next_bitmap_id++;
  131. client().post_message(Messages::WebContentServer::AddBackingStore(m_client_state.back_bitmap_id, m_client_state.back_bitmap->to_shareable_bitmap()));
  132. }
  133. request_repaint();
  134. }
  135. void OutOfProcessWebView::keydown_event(GUI::KeyEvent& event)
  136. {
  137. client().post_message(Messages::WebContentServer::KeyDown(event.key(), event.modifiers(), event.code_point()));
  138. }
  139. void OutOfProcessWebView::mousedown_event(GUI::MouseEvent& event)
  140. {
  141. client().post_message(Messages::WebContentServer::MouseDown(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers()));
  142. }
  143. void OutOfProcessWebView::mouseup_event(GUI::MouseEvent& event)
  144. {
  145. client().post_message(Messages::WebContentServer::MouseUp(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers()));
  146. }
  147. void OutOfProcessWebView::mousemove_event(GUI::MouseEvent& event)
  148. {
  149. client().post_message(Messages::WebContentServer::MouseMove(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers()));
  150. }
  151. void OutOfProcessWebView::theme_change_event(GUI::ThemeChangeEvent& event)
  152. {
  153. GUI::ScrollableWidget::theme_change_event(event);
  154. client().post_message(Messages::WebContentServer::UpdateSystemTheme(Gfx::current_system_theme_buffer()));
  155. request_repaint();
  156. }
  157. void OutOfProcessWebView::notify_server_did_paint(Badge<WebContentClient>, i32 bitmap_id)
  158. {
  159. if (m_client_state.back_bitmap_id == bitmap_id) {
  160. m_client_state.has_usable_bitmap = true;
  161. swap(m_client_state.back_bitmap, m_client_state.front_bitmap);
  162. swap(m_client_state.back_bitmap_id, m_client_state.front_bitmap_id);
  163. update();
  164. }
  165. }
  166. void OutOfProcessWebView::notify_server_did_invalidate_content_rect(Badge<WebContentClient>, [[maybe_unused]] const Gfx::IntRect& content_rect)
  167. {
  168. request_repaint();
  169. }
  170. void OutOfProcessWebView::notify_server_did_change_selection(Badge<WebContentClient>)
  171. {
  172. request_repaint();
  173. }
  174. void OutOfProcessWebView::notify_server_did_layout(Badge<WebContentClient>, const Gfx::IntSize& content_size)
  175. {
  176. set_content_size(content_size);
  177. }
  178. void OutOfProcessWebView::notify_server_did_change_title(Badge<WebContentClient>, const String& title)
  179. {
  180. if (on_title_change)
  181. on_title_change(title);
  182. }
  183. void OutOfProcessWebView::notify_server_did_request_scroll_into_view(Badge<WebContentClient>, const Gfx::IntRect& rect)
  184. {
  185. scroll_into_view(rect, true, true);
  186. }
  187. void OutOfProcessWebView::notify_server_did_hover_link(Badge<WebContentClient>, const URL& url)
  188. {
  189. set_override_cursor(Gfx::StandardCursor::Hand);
  190. if (on_link_hover)
  191. on_link_hover(url);
  192. }
  193. void OutOfProcessWebView::notify_server_did_unhover_link(Badge<WebContentClient>)
  194. {
  195. set_override_cursor(Gfx::StandardCursor::None);
  196. if (on_link_hover)
  197. on_link_hover({});
  198. }
  199. void OutOfProcessWebView::notify_server_did_click_link(Badge<WebContentClient>, const URL& url, const String& target, unsigned int modifiers)
  200. {
  201. if (on_link_click)
  202. on_link_click(url, target, modifiers);
  203. }
  204. void OutOfProcessWebView::notify_server_did_middle_click_link(Badge<WebContentClient>, const URL& url, const String& target, unsigned int modifiers)
  205. {
  206. if (on_link_middle_click)
  207. on_link_middle_click(url, target, modifiers);
  208. }
  209. void OutOfProcessWebView::notify_server_did_start_loading(Badge<WebContentClient>, const URL& url)
  210. {
  211. if (on_load_start)
  212. on_load_start(url);
  213. }
  214. void OutOfProcessWebView::notify_server_did_finish_loading(Badge<WebContentClient>, const URL& url)
  215. {
  216. if (on_load_finish)
  217. on_load_finish(url);
  218. }
  219. void OutOfProcessWebView::notify_server_did_request_context_menu(Badge<WebContentClient>, const Gfx::IntPoint& content_position)
  220. {
  221. if (on_context_menu_request)
  222. on_context_menu_request(screen_relative_rect().location().translated(to_widget_position(content_position)));
  223. }
  224. void OutOfProcessWebView::notify_server_did_request_link_context_menu(Badge<WebContentClient>, const Gfx::IntPoint& content_position, const URL& url, const String&, unsigned)
  225. {
  226. if (on_link_context_menu_request)
  227. on_link_context_menu_request(url, screen_relative_rect().location().translated(to_widget_position(content_position)));
  228. }
  229. void OutOfProcessWebView::notify_server_did_request_alert(Badge<WebContentClient>, const String& message)
  230. {
  231. GUI::MessageBox::show(window(), message, "Alert", GUI::MessageBox::Type::Information);
  232. }
  233. void OutOfProcessWebView::did_scroll()
  234. {
  235. client().post_message(Messages::WebContentServer::SetViewportRect(visible_content_rect()));
  236. request_repaint();
  237. }
  238. void OutOfProcessWebView::request_repaint()
  239. {
  240. // If this widget was instantiated but not yet added to a window,
  241. // it won't have a back bitmap yet, so we can just skip repaint requests.
  242. if (!m_client_state.back_bitmap)
  243. return;
  244. client().post_message(Messages::WebContentServer::Paint(m_client_state.back_bitmap->rect().translated(horizontal_scrollbar().value(), vertical_scrollbar().value()), m_client_state.back_bitmap_id));
  245. }
  246. WebContentClient& OutOfProcessWebView::client()
  247. {
  248. ASSERT(m_client_state.client);
  249. return *m_client_state.client;
  250. }
  251. }