Browser: Add bookmarks bar

This patchset adds a bookmark bar that is backed by a json file backend.
The json file is loaded and checked for the format. According to the
format, the bookmarks bar is populated with the bookmark items.

If the bookmarks do not fit into one line, an expader button is shown
that brings up a menu containing the missing bookmark items.

There is currently no way to add or remove bookmarks. A hover over a
bookmark is also not yet showing the url in the statusbar.

5 files changed, 245 insertions, 8 deletions

diff --git a/Applications/Browser/BookmarksBarWidget.cpp b/Applications/Browser/BookmarksBarWidget.cpp
new file mode 100644
index 0000000000..f51bfe0e69
--- /dev/null
+++ b/Applications/Browser/BookmarksBarWidget.cpp
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "BookmarksBarWidget.h"
+#include <LibGUI/Action.h>
+#include <LibGUI/BoxLayout.h>
+#include <LibGUI/Button.h>
+#include <LibGUI/Event.h>
+#include <LibGUI/JsonArrayModel.h>
+#include <LibGUI/Menu.h>
+#include <LibGUI/Model.h>
+#include <LibGUI/Widget.h>
+#include <LibGUI/Window.h>
+#include <LibGfx/Palette.h>
+
+BookmarksBarWidget::BookmarksBarWidget(const String& bookmarks_file, bool enabled)
+{
+    set_layout<GUI::HorizontalBoxLayout>();
+    layout()->set_spacing(0);
+
+    set_size_policy(GUI::SizePolicy::Fill, GUI::SizePolicy::Fixed);
+    set_preferred_size(0, 20);
+
+    if (!enabled)
+        set_visible(false);
+
+    m_additional = GUI::Button::construct();
+    m_additional->set_button_style(Gfx::ButtonStyle::CoolBar);
+    m_additional->set_text(">");
+    m_additional->set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fixed);
+    m_additional->set_preferred_size(14, 20);
+    m_additional->on_click = [&] {
+        if (m_additional_menu) {
+            m_additional_menu->popup(m_additional->relative_position().translated(relative_position().translated(m_additional->window()->position())));
+        }
+    };
+
+    m_separator = GUI::Widget::construct();
+
+    Vector<GUI::JsonArrayModel::FieldSpec> fields;
+    fields.empend("title", "Title", Gfx::TextAlignment::CenterLeft);
+    fields.empend("url", "Url", Gfx::TextAlignment::CenterRight);
+    set_model(GUI::JsonArrayModel::create(bookmarks_file, move(fields)));
+    model()->update();
+}
+
+BookmarksBarWidget::~BookmarksBarWidget()
+{
+}
+
+void BookmarksBarWidget::set_model(RefPtr<GUI::Model> model)
+{
+    if (model == m_model)
+        return;
+    m_model = move(model);
+    m_model->on_update = [&]() {
+        did_update_model();
+    };
+}
+
+void BookmarksBarWidget::resize_event(GUI::ResizeEvent& event)
+{
+    Widget::resize_event(event);
+    update_content_size();
+}
+
+void BookmarksBarWidget::did_update_model()
+{
+    for (auto* child : child_widgets()) {
+        child->remove_from_parent();
+    }
+    child_widgets().clear();
+
+    m_bookmarks.clear();
+
+    int width = 0;
+    for (int item_index = 0; item_index < model()->row_count(); ++item_index) {
+
+        auto title = model()->data(model()->index(item_index, 0)).to_string();
+        auto url = model()->data(model()->index(item_index, 1)).to_string();
+
+        Gfx::Rect rect { width, 0, font().width(title) + 32, height() };
+
+        auto& button = add<GUI::Button>();
+        m_bookmarks.append(button);
+
+        button.set_button_style(Gfx::ButtonStyle::CoolBar);
+        button.set_text(title);
+        button.set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fixed);
+        button.set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/filetype-html.png"));
+        button.set_preferred_size(font().width(title) + 32, 20);
+        button.set_relative_rect(rect);
+
+        button.on_click = [title, url, this] {
+            if (on_bookmark_click)
+                on_bookmark_click(title, url);
+        };
+
+        width += rect.width();
+    }
+
+    add_child(*m_separator);
+    add_child(*m_additional);
+
+    update_content_size();
+    update();
+}
+
+void BookmarksBarWidget::update_content_size()
+{
+    int x_position = 0;
+    m_last_visible_index = -1;
+
+    for (size_t i = 0; i < m_bookmarks.size(); ++i) {
+        auto& bookmark = m_bookmarks.at(i);
+        if (x_position + bookmark.width() > width()) {
+            m_last_visible_index = i;
+            break;
+        }
+        bookmark.set_x(x_position);
+        bookmark.set_visible(true);
+        x_position += bookmark.width();
+    }
+
+    if (m_last_visible_index < 0) {
+        m_additional->set_visible(false);
+    } else {
+        // hide all items > m_last_visible_index and create new bookmarks menu for them
+        m_additional->set_visible(true);
+        m_additional_menu = GUI::Menu::construct("Additional Bookmarks");
+        for (size_t i = m_last_visible_index; i < m_bookmarks.size(); ++i) {
+            auto& bookmark = m_bookmarks.at(i);
+            bookmark.set_visible(false);
+            m_additional_menu->add_action(GUI::Action::create(bookmark.text(),
+                Gfx::Bitmap::load_from_file("/res/icons/16x16/filetype-html.png"),
+                [&](auto&) {
+                    bookmark.on_click();
+                }));
+        }
+    }
+}
diff --git a/Applications/Browser/BookmarksBarWidget.h b/Applications/Browser/BookmarksBarWidget.h
new file mode 100644
index 0000000000..c9135d6549
--- /dev/null
+++ b/Applications/Browser/BookmarksBarWidget.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibGUI/Forward.h>
+#include <LibGUI/Widget.h>
+
+class BookmarksBarWidget final : public GUI::Widget {
+    C_OBJECT(BookmarksBarWidget)
+public:
+    virtual ~BookmarksBarWidget() override;
+
+    void set_model(RefPtr<GUI::Model>);
+    GUI::Model* model() { return m_model.ptr(); }
+    const GUI::Model* model() const { return m_model.ptr(); }
+
+    Function<void(const String&, const String&)> on_bookmark_click;
+    Function<void(const String&, const String&)> on_bookmark_hover;
+
+private:
+    BookmarksBarWidget(const String&, bool enabled);
+
+    virtual void did_update_model();
+    virtual void resize_event(GUI::ResizeEvent&) override;
+
+    void update_content_size();
+
+    RefPtr<GUI::Model> m_model;
+    RefPtr<GUI::Button> m_additional;
+    RefPtr<GUI::Widget> m_separator;
+    RefPtr<GUI::Menu> m_additional_menu;
+
+    NonnullRefPtrVector<GUI::Button> m_bookmarks;
+
+    int m_last_visible_index { -1 };
+};
diff --git a/Applications/Browser/Makefile b/Applications/Browser/Makefile
index 962266dacc..ce65632cd4 100755
--- a/Applications/Browser/Makefile
+++ b/Applications/Browser/Makefile
@@ -1,6 +1,7 @@
 OBJS = \
     main.o \
-    InspectorWidget.o
+    InspectorWidget.o \
+	BookmarksBarWidget.o
 
 PROGRAM = Browser
 
diff --git a/Applications/Browser/main.cpp b/Applications/Browser/main.cpp
index e2bfa9e890..441d8ddfb7 100644
--- a/Applications/Browser/main.cpp
+++ b/Applications/Browser/main.cpp
@@ -24,6 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "BookmarksBarWidget.h"
 #include "History.h"
 #include "InspectorWidget.h"
 #include <LibCore/File.h>
@@ -53,6 +54,7 @@
 #include <stdlib.h>
 
 static const char* home_url = "file:///home/anon/www/welcome.html";
+static const char* bookmarks_filename = "/home/anon/bookmarks.json";
 
 int main(int argc, char** argv)
 {
@@ -71,7 +73,6 @@ int main(int argc, char** argv)
         return 1;
     }
 
-
     auto window = GUI::Window::construct();
     window->set_rect(100, 100, 640, 480);
 
@@ -80,14 +81,15 @@ int main(int argc, char** argv)
     widget.set_layout<GUI::VerticalBoxLayout>();
     widget.layout()->set_spacing(0);
 
+    bool bookmarksbar_enabled = true;
+
     auto& toolbar = widget.add<GUI::ToolBar>();
-    auto& bookmarksbar = widget.add<GUI::Widget>();
+    auto& bookmarksbar = widget.add<BookmarksBarWidget>(bookmarks_filename, bookmarksbar_enabled);
     auto& html_widget = widget.add<Web::HtmlView>();
 
-    bool bookmarksbar_enabled = true;
-    bookmarksbar.set_layout<GUI::HorizontalBoxLayout>();
-    bookmarksbar.set_size_policy(GUI::SizePolicy::Fill, GUI::SizePolicy::Fixed);
-    bookmarksbar.set_preferred_size(0, bookmarksbar_enabled ? 20 : 0);
+    bookmarksbar.on_bookmark_click = [&](auto&, auto& url) {
+        html_widget.load(url);
+    };
 
     History<URL> history;
 
@@ -163,6 +165,10 @@ int main(int argc, char** argv)
         statusbar.set_text(href);
     };
 
+    bookmarksbar.on_bookmark_hover = [&](auto&, auto& url) {
+        statusbar.set_text(url);
+    };
+
     Web::ResourceLoader::the().on_load_counter_change = [&] {
         if (Web::ResourceLoader::the().pending_loads() == 0) {
             statusbar.set_text("");
@@ -241,7 +247,7 @@ int main(int argc, char** argv)
     auto bookmarks_menu = GUI::Menu::construct("Bookmarks");
     auto show_bookmarksbar_action = GUI::Action::create("Show bookmarks bar", [&](auto& action) {
         action.set_checked(!action.is_checked());
-        bookmarksbar.set_preferred_size(0, action.is_checked() ? 20 : 0);
+        bookmarksbar.set_visible(action.is_checked());
         bookmarksbar.update();
     });
     show_bookmarksbar_action->set_checkable(true);
diff --git a/Base/home/anon/bookmarks.json b/Base/home/anon/bookmarks.json
new file mode 100644
index 0000000000..0ca1f3eab7
--- /dev/null
+++ b/Base/home/anon/bookmarks.json
@@ -0,0 +1,6 @@
+[
+    {
+        "title": "SerenityOS.org",
+        "url": "http://www.serenityos.org/"
+    }
+]