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** Copyright (C) Filippo Cucchetto <filippocucchetto@gmail.com>
** Contact: http://www.qt.io/licensing
**
** This file is part of Qt Creator.
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** GNU General Public License Usage
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** General Public License version 3 as published by the Free Software
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#include "nimcodestylepreferenceswidget.h"
#include "ui_nimcodestylepreferenceswidget.h"

#include "nimconstants.h"

#include <extensionsystem/pluginmanager.h>
#include <texteditor/displaysettings.h>
#include <texteditor/fontsettings.h>
#include <texteditor/icodestylepreferences.h>
#include <texteditor/indenter.h>
#include <texteditor/tabsettings.h>
#include <texteditor/textdocument.h>
#include <texteditor/texteditorsettings.h>
#include <texteditor/snippets/isnippetprovider.h>

using namespace TextEditor;

namespace Nim {

NimCodeStylePreferencesWidget::NimCodeStylePreferencesWidget(ICodeStylePreferences *preferences, QWidget *parent)
    : QWidget(parent)
    , m_preferences(preferences)
    , m_ui(new Ui::NimCodeStylePreferencesWidget())
{
    m_ui->setupUi(this);
    m_ui->tabPreferencesWidget->setPreferences(preferences);
    m_ui->previewTextEdit->setPlainText(Nim::Constants::C_NIMCODESTYLEPREVIEWSNIPPET);

    ISnippetProvider *provider = ExtensionSystem::PluginManager::getObject<ISnippetProvider>(
                [](ISnippetProvider *provider) {
            return provider->groupId() == Nim::Constants::C_NIMSNIPPETSGROUP_ID;
    });

    if (provider)
        provider->decorateEditor(m_ui->previewTextEdit);

    decorateEditor(TextEditorSettings::fontSettings());
    connect(TextEditorSettings::instance(), &TextEditorSettings::fontSettingsChanged,
       this, &NimCodeStylePreferencesWidget::decorateEditor);

    connect(m_preferences, &ICodeStylePreferences::currentTabSettingsChanged,
            this, &NimCodeStylePreferencesWidget::updatePreview);

    setVisualizeWhitespace(true);

    updatePreview();
}

NimCodeStylePreferencesWidget::~NimCodeStylePreferencesWidget()
{
    delete m_ui;
    m_ui = nullptr;
}

void NimCodeStylePreferencesWidget::decorateEditor(const FontSettings &fontSettings)
{
    const ISnippetProvider *provider = ExtensionSystem::PluginManager::getObject<ISnippetProvider>(
        [](ISnippetProvider *current) {
            return current->groupId() == Nim::Constants::C_NIMSNIPPETSGROUP_ID;
        });

    m_ui->previewTextEdit->textDocument()->setFontSettings(fontSettings);
    if (provider)
        provider->decorateEditor(m_ui->previewTextEdit);
}

void NimCodeStylePreferencesWidget::setVisualizeWhitespace(bool on)
{
    DisplaySettings displaySettings = m_ui->previewTextEdit->displaySettings();
    displaySettings.m_visualizeWhitespace = on;
    m_ui->previewTextEdit->setDisplaySettings(displaySettings);
}

void NimCodeStylePreferencesWidget::updatePreview()
{
    QTextDocument *doc = m_ui->previewTextEdit->document();

    const TabSettings &ts = m_preferences
            ? m_preferences->currentTabSettings()
            : TextEditorSettings::codeStyle()->tabSettings();
    m_ui->previewTextEdit->textDocument()->setTabSettings(ts);

    QTextBlock block = doc->firstBlock();
    QTextCursor tc = m_ui->previewTextEdit->textCursor();
    tc.beginEditBlock();
    while (block.isValid()) {
        m_ui->previewTextEdit->textDocument()->indenter()
                ->indentBlock(doc, block, QChar::Null, ts);
        block = block.next();
    }
    tc.endEditBlock();
}

} // namespace Nim