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/*
 * e-html-editor-replace-dialog.h
 *
 * Copyright (C) 2012 Dan Vrátil <dvratil@redhat.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-html-editor-replace-dialog.h"

#include <glib/gi18n-lib.h>

#define E_HTML_EDITOR_REPLACE_DIALOG_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_HTML_EDITOR_REPLACE_DIALOG, EHTMLEditorReplaceDialogPrivate))

G_DEFINE_TYPE (
    EHTMLEditorReplaceDialog,
    e_html_editor_replace_dialog,
    E_TYPE_HTML_EDITOR_DIALOG);

struct _EHTMLEditorReplaceDialogPrivate {
    GtkWidget *search_entry;
    GtkWidget *replace_entry;

    GtkWidget *case_sensitive;
    GtkWidget *backwards;
    GtkWidget *wrap;

    GtkWidget *result_label;

    GtkWidget *skip_button;
    GtkWidget *replace_button;
    GtkWidget *replace_all_button;

    EHTMLEditor *editor;
};

enum {
    PROP_0,
    PROP_EDITOR
};

static gboolean
jump (EHTMLEditorReplaceDialog *dialog)
{
    EHTMLEditor *editor;
    WebKitWebView *webview;
    gboolean found;

    editor = e_html_editor_dialog_get_editor (E_HTML_EDITOR_DIALOG (dialog));
    webview = WEBKIT_WEB_VIEW (
            e_html_editor_get_view (editor));

    found = webkit_web_view_search_text (
        webview,
        gtk_entry_get_text (GTK_ENTRY (dialog->priv->search_entry)),
        gtk_toggle_button_get_active (
            GTK_TOGGLE_BUTTON (dialog->priv->case_sensitive)),
        !gtk_toggle_button_get_active (
            GTK_TOGGLE_BUTTON (dialog->priv->backwards)),
        gtk_toggle_button_get_active (
            GTK_TOGGLE_BUTTON (dialog->priv->wrap)));

    return found;
}

static void
html_editor_replace_dialog_skip_cb (EHTMLEditorReplaceDialog *dialog)
{
    if (!jump (dialog)) {
        gtk_label_set_label (
            GTK_LABEL (dialog->priv->result_label),
            N_("No match found"));
        gtk_widget_show (dialog->priv->result_label);
    } else {
        gtk_widget_hide (dialog->priv->result_label);
    }
}

static void
html_editor_replace_dialog_replace_cb (EHTMLEditorReplaceDialog *dialog)
{
    EHTMLEditor *editor;
    EHTMLEditorView *view;
    EHTMLEditorSelection *selection;

    /* Jump to next matching word */
    if (!jump (dialog)) {
        gtk_label_set_label (
            GTK_LABEL (dialog->priv->result_label),
            N_("No match found"));
        gtk_widget_show (dialog->priv->result_label);
        return;
    } else {
        gtk_widget_hide (dialog->priv->result_label);
    }

    editor = e_html_editor_dialog_get_editor (E_HTML_EDITOR_DIALOG (dialog));
    view = e_html_editor_get_view (editor);
    selection = e_html_editor_view_get_selection (view);

    e_html_editor_selection_replace (
        selection,
        gtk_entry_get_text (GTK_ENTRY (dialog->priv->replace_entry)));
}

static void
html_editor_replace_dialog_replace_all_cb (EHTMLEditorReplaceDialog *dialog)
{
    gint i = 0;
    gchar *result;
    EHTMLEditor *editor;
    EHTMLEditorView *view;
    EHTMLEditorSelection *selection;
    const gchar *replacement;

    editor = e_html_editor_dialog_get_editor (E_HTML_EDITOR_DIALOG (dialog));
    view = e_html_editor_get_view (editor);
    selection = e_html_editor_view_get_selection (view);
    replacement = gtk_entry_get_text (GTK_ENTRY (dialog->priv->replace_entry));

    while (jump (dialog)) {
        e_html_editor_selection_replace (selection, replacement);
        i++;

        /* Jump behind the word */
        e_html_editor_selection_move (
            selection, TRUE, E_HTML_EDITOR_SELECTION_GRANULARITY_WORD);
    }

    result = g_strdup_printf (_("%d occurences replaced"), i);
    gtk_label_set_label (GTK_LABEL (dialog->priv->result_label), result);
    gtk_widget_show (dialog->priv->result_label);
    g_free (result);
}

static void
html_editor_replace_dialog_entry_changed (EHTMLEditorReplaceDialog *dialog)
{
    gboolean ready;
    ready = ((gtk_entry_get_text_length (
            GTK_ENTRY (dialog->priv->search_entry)) != 0) &&
         (gtk_entry_get_text_length (
             GTK_ENTRY (dialog->priv->replace_entry)) != 0));

    gtk_widget_set_sensitive (dialog->priv->skip_button, ready);
    gtk_widget_set_sensitive (dialog->priv->replace_button, ready);
    gtk_widget_set_sensitive (dialog->priv->replace_all_button, ready);
}

static void
html_editor_replace_dialog_show (GtkWidget *widget)
{
    EHTMLEditorReplaceDialog *dialog = E_HTML_EDITOR_REPLACE_DIALOG (widget);

    gtk_widget_grab_focus (dialog->priv->search_entry);
    gtk_widget_hide (dialog->priv->result_label);

    /* Chain up to parent implementation */
    GTK_WIDGET_CLASS (e_html_editor_replace_dialog_parent_class)->show (widget);
}

static void
e_html_editor_replace_dialog_class_init (EHTMLEditorReplaceDialogClass *class)
{
    GtkWidgetClass *widget_class;

    g_type_class_add_private (class, sizeof (EHTMLEditorReplaceDialogPrivate));

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->show = html_editor_replace_dialog_show;
}

static void
e_html_editor_replace_dialog_init (EHTMLEditorReplaceDialog *dialog)
{
    GtkGrid *main_layout;
    GtkWidget *widget, *layout;
    GtkBox *button_box;

    dialog->priv = E_HTML_EDITOR_REPLACE_DIALOG_GET_PRIVATE (dialog);

    main_layout = e_html_editor_dialog_get_container (E_HTML_EDITOR_DIALOG (dialog));

    widget = gtk_entry_new ();
    gtk_grid_attach (main_layout, widget, 1, 0, 2, 1);
    dialog->priv->search_entry = widget;
    g_signal_connect_swapped (
        widget, "notify::text-length",
        G_CALLBACK (html_editor_replace_dialog_entry_changed), dialog);

    widget = gtk_label_new_with_mnemonic (_("R_eplace:"));
    gtk_label_set_mnemonic_widget (GTK_LABEL (widget), dialog->priv->search_entry);
    gtk_label_set_justify (GTK_LABEL (widget), GTK_JUSTIFY_RIGHT);
    gtk_grid_attach (main_layout, widget, 0, 0, 1, 1);

    widget = gtk_entry_new ();
    gtk_grid_attach (main_layout, widget, 1, 1, 2, 1);
    dialog->priv->replace_entry = widget;
    g_signal_connect_swapped (
        widget, "notify::text-length",
        G_CALLBACK (html_editor_replace_dialog_entry_changed), dialog);

    widget = gtk_label_new_with_mnemonic (_("_With:"));
    gtk_label_set_mnemonic_widget (GTK_LABEL (widget), dialog->priv->replace_entry);
    gtk_label_set_justify (GTK_LABEL (widget), GTK_JUSTIFY_RIGHT);
    gtk_grid_attach (main_layout, widget, 0, 1, 1, 1);

    layout = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 5);
    gtk_grid_attach (main_layout, layout, 1, 2, 2, 1);

    widget = gtk_check_button_new_with_mnemonic (_("Search _backwards"));
    gtk_box_pack_start (GTK_BOX (layout), widget, FALSE, FALSE, 0);
    dialog->priv->backwards = widget;

    widget = gtk_check_button_new_with_mnemonic (_("_Case sensitive"));
    gtk_box_pack_start (GTK_BOX (layout), widget, FALSE, FALSE, 0);
    dialog->priv->case_sensitive = widget;

    widget = gtk_check_button_new_with_mnemonic (_("Wra_p search"));
    gtk_box_pack_start (GTK_BOX (layout), widget, FALSE, FALSE, 0);
    dialog->priv->wrap = widget;

    widget = gtk_label_new ("");
    gtk_grid_attach (main_layout, widget, 0, 3, 2, 1);
    dialog->priv->result_label = widget;

    button_box = e_html_editor_dialog_get_button_box (E_HTML_EDITOR_DIALOG (dialog));

    widget = gtk_button_new_with_mnemonic (_("_Skip"));
    gtk_box_pack_start (button_box, widget, FALSE, FALSE, 5);
    gtk_widget_set_sensitive (widget, FALSE);
    dialog->priv->skip_button = widget;
    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (html_editor_replace_dialog_skip_cb), dialog);

    widget = gtk_button_new_with_mnemonic (_("_Replace"));
    gtk_box_pack_start (button_box, widget, FALSE, FALSE, 5);
    gtk_widget_set_sensitive (widget, FALSE);
    dialog->priv->replace_button = widget;
    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (html_editor_replace_dialog_replace_cb), dialog);

    widget = gtk_button_new_with_mnemonic (_("Replace _All"));
    gtk_box_pack_start (button_box, widget, FALSE, FALSE, 5);
    gtk_widget_set_sensitive (widget, FALSE);
    dialog->priv->replace_all_button = widget;
    g_signal_connect_swapped (
        widget, "clicked",
        G_CALLBACK (html_editor_replace_dialog_replace_all_cb), dialog);

    gtk_widget_show_all (GTK_WIDGET (main_layout));
}

GtkWidget *
e_html_editor_replace_dialog_new (EHTMLEditor *editor)
{
    return GTK_WIDGET (
        g_object_new (
            E_TYPE_HTML_EDITOR_REPLACE_DIALOG,
            "editor", editor,
            "icon-name", GTK_STOCK_FIND_AND_REPLACE,
            "resizable", FALSE,
            "title", N_("Replace"),
            "transient-for", gtk_widget_get_toplevel (GTK_WIDGET (editor)),
            "type", GTK_WINDOW_TOPLEVEL,
            "window-position", GTK_WIN_POS_CENTER_ON_PARENT,
            NULL));
}