/*
 *      htmlchars.c - this file is part of Geany, a fast and lightweight IDE
 *
 *      Copyright 2006-2008 Enrico Tröger <enrico(dot)troeger(at)uvena(dot)de>
 *      Copyright 2007-2008 Nick Treleaven <nick(dot)treleaven(at)btinternet(dot)com>
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 *
 *      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 General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 *
 * $Id$
 */

/* HTML Characters plugin (Inserts HTML character entities like '&amp;') */

#include "geany.h"
#include "support.h"
#include "plugindata.h"
#include "document.h"
#include "editor.h"
#include "keybindings.h"
#include "ui_utils.h"
#include "utils.h"
#include "pluginmacros.h"


GeanyData		*geany_data;
GeanyFunctions	*geany_functions;


PLUGIN_VERSION_CHECK(GEANY_API_VERSION)

PLUGIN_SET_INFO(_("HTML Characters"), _("Inserts HTML character entities like '&amp;'."), VERSION,
	_("The Geany developer team"))


/* Keybinding(s) */
enum
{
	KB_INSERT_HTML_CHARS,
	KB_COUNT
};

PLUGIN_KEY_GROUP(html_chars, KB_COUNT)


enum
{
	COLUMN_CHARACTER,
	COLUMN_HTML_NAME,
	N_COLUMNS
};


static GtkWidget *main_menu_item = NULL;
static GtkWidget *sc_dialog = NULL;
static GtkTreeStore *sc_store = NULL;
static GtkTreeView *sc_tree = NULL;

static void sc_on_tools_show_dialog_insert_special_chars_response
		(GtkDialog *dialog, gint response, gpointer user_data);
static void sc_on_tree_row_activated
		(GtkTreeView *treeview, GtkTreePath *path, GtkTreeViewColumn *col, gpointer user_data);
static void sc_fill_store(GtkTreeStore *store);
static gboolean sc_insert(GtkTreeModel *model, GtkTreeIter *iter);


static void tools_show_dialog_insert_special_chars(void)
{
	if (sc_dialog == NULL)
	{
		gint height;
		GtkCellRenderer *renderer;
		GtkTreeViewColumn *column;
		GtkWidget *swin, *vbox, *label;

		sc_dialog = gtk_dialog_new_with_buttons(
					_("Special Characters"), GTK_WINDOW(geany->main_widgets->window),
					GTK_DIALOG_DESTROY_WITH_PARENT, GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
					_("_Insert"), GTK_RESPONSE_OK, NULL);
		vbox = p_ui->dialog_vbox_new(GTK_DIALOG(sc_dialog));
		gtk_box_set_spacing(GTK_BOX(vbox), 6);
		gtk_widget_set_name(sc_dialog, "GeanyDialog");

		height = GEANY_WINDOW_MINIMAL_HEIGHT;
		gtk_window_set_default_size(GTK_WINDOW(sc_dialog), height * 8 / 10, height);
		gtk_dialog_set_default_response(GTK_DIALOG(sc_dialog), GTK_RESPONSE_CANCEL);

		label = gtk_label_new(_("Choose a special character from the list below and double click on it or use the button to insert it at the current cursor position."));
		gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
		gtk_misc_set_alignment(GTK_MISC(label), 0, 0.5);
		gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);

		sc_tree = GTK_TREE_VIEW(gtk_tree_view_new());

		sc_store = gtk_tree_store_new(N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING);
		gtk_tree_view_set_model(GTK_TREE_VIEW(sc_tree),
								GTK_TREE_MODEL(sc_store));
		g_object_unref(sc_store);

		renderer = gtk_cell_renderer_text_new();
		column = gtk_tree_view_column_new_with_attributes(
								_("Character"), renderer, "text", COLUMN_CHARACTER, NULL);
		gtk_tree_view_column_set_resizable(column, TRUE);
		gtk_tree_view_append_column(GTK_TREE_VIEW(sc_tree), column);

		renderer = gtk_cell_renderer_text_new();
		column = gtk_tree_view_column_new_with_attributes(
								_("HTML (name)"), renderer, "text", COLUMN_HTML_NAME, NULL);
		gtk_tree_view_column_set_resizable(column, TRUE);
		gtk_tree_view_append_column(GTK_TREE_VIEW(sc_tree), column);

		swin = gtk_scrolled_window_new(NULL, NULL);
		gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(swin), GTK_POLICY_AUTOMATIC,
			GTK_POLICY_AUTOMATIC);
		gtk_scrolled_window_add_with_viewport(
					GTK_SCROLLED_WINDOW(swin), GTK_WIDGET(sc_tree));

		gtk_box_pack_start(GTK_BOX(vbox), swin, TRUE, TRUE, 0);

		g_signal_connect(sc_tree, "row-activated", G_CALLBACK(sc_on_tree_row_activated), NULL);

		g_signal_connect(sc_dialog, "response",
					G_CALLBACK(sc_on_tools_show_dialog_insert_special_chars_response), NULL);

		g_signal_connect(sc_dialog, "delete-event", G_CALLBACK(gtk_widget_hide_on_delete), NULL);

		sc_fill_store(sc_store);

		/*gtk_tree_view_expand_all(special_characters_tree);*/
		gtk_tree_view_set_search_column(sc_tree, COLUMN_HTML_NAME);
	}
	gtk_widget_show_all(sc_dialog);
}


/* fill the tree model with data
 ** TODO move this in a file and make it extendable for more data types */
static void sc_fill_store(GtkTreeStore *store)
{
	GtkTreeIter iter;
	GtkTreeIter *parent_iter = NULL;
	guint i;

	gchar *chars[][2] =
		{
			{ _("HTML characters"), NULL },
			{ "\"", "&quot;" },
			{ "&", "&amp;" },
			{ "<", "&lt;" },
			{ ">", "&gt;" },

			{ _("ISO 8859-1 characters"), NULL },
			{ " ", "&nbsp;" },
			{ "¡", "&iexcl;" },
			{ "¢", "&cent;" },
			{ "£", "&pound;" },
			{ "¤", "&curren;" },
			{ "¥", "&yen;" },
			{ "¦", "&brvbar;" },
			{ "§", "&sect;" },
			{ "¨", "&uml;" },
			{ "©", "&copy;" },
			{ "®", "&reg;" },
			{ "«", "&laquo;" },
			{ "»", "&raquo;" },
			{ "¬", "&not;" },
			{ " ", "&shy;" },
			{ "¯", "&macr;" },
			{ "°", "&deg;" },
			{ "±", "&plusmn;" },
			{ "¹", "&sup1;" },
			{ "²", "&sup2;" },
			{ "³", "&sup3;" },
			{ "¼", "&frac14;" },
			{ "½", "&frac12;" },
			{ "¾", "&frac34;" },
			{ "×", "&times;" },
			{ "÷", "&divide;" },
			{ "´", "&acute;" },
			{ "µ", "&micro;" },
			{ "¶", "&para;" },
			{ "·", "&middot;" },
			{ "¸", "&cedil;" },
			{ "ª", "&ordf;" },
			{ "º", "&ordm;" },
			{ "¿", "&iquest;" },
			{ "À", "&Agrave;" },
			{ "Á", "&Aacute;" },
			{ "Â", "&Acirc;" },
			{ "Ã", "&Atilde;" },
			{ "Ä", "&Auml;" },
			{ "Å", "&Aring;" },
			{ "Æ", "&AElig;" },
			{ "Ç", "&Ccedil;" },
			{ "È", "&Egrave;" },
			{ "É", "&Eacute;" },
			{ "Ê", "&Ecirc;" },
			{ "Ë", "&Euml;" },
			{ "Ì", "&Igrave;" },
			{ "Í", "&Iacute;" },
			{ "Î", "&Icirc;" },
			{ "Ï", "&Iuml;" },
			{ "Ð", "&ETH;" },
			{ "Ñ", "&Ntilde;" },
			{ "Ò", "&Ograve;" },
			{ "Ó", "&Oacute;" },
			{ "Ô", "&Ocirc;" },
			{ "Õ", "&Otilde;" },
			{ "Ö", "&Ouml;" },
			{ "Ø", "&Oslash;" },
			{ "Ù", "&Ugrave;" },
			{ "Ú", "&Uacute;" },
			{ "Û", "&Ucirc;" },
			{ "Ü", "&Uuml;" },
			{ "Ý", "&Yacute;" },
			{ "Þ", "&THORN;" },
			{ "ß", "&szlig;" },
			{ "à", "&agrave;" },
			{ "á", "&aacute;" },
			{ "â", "&acirc;" },
			{ "ã", "&atilde;" },
			{ "ä", "&auml;" },
			{ "å", "&aring;" },
			{ "æ", "&aelig;" },
			{ "ç", "&ccedil;" },
			{ "è", "&egrave;" },
			{ "é", "&eacute;" },
			{ "ê", "&ecirc;" },
			{ "ë", "&euml;" },
			{ "ì", "&igrave;" },
			{ "í", "&iacute;" },
			{ "î", "&icirc;" },
			{ "ï", "&iuml;" },
			{ "ð", "&eth;" },
			{ "ñ", "&ntilde;" },
			{ "ò", "&ograve;" },
			{ "ó", "&oacute;" },
			{ "ô", "&ocirc;" },
			{ "õ", "&otilde;" },
			{ "ö", "&ouml;" },
			{ "ø", "&oslash;" },
			{ "ù", "&ugrave;" },
			{ "ú", "&uacute;" },
			{ "û", "&ucirc;" },
			{ "ü", "&uuml;" },
			{ "ý", "&yacute;" },
			{ "þ", "&thorn;" },
			{ "ÿ", "&yuml;" },

			{ _("Greek characters"), NULL },
			{ "Α", "&Alpha;" },
			{ "α", "&alpha;" },
			{ "Β", "&Beta;" },
			{ "β", "&beta;" },
			{ "Γ", "&Gamma;" },
			{ "γ", "&gamma;" },
			{ "Δ", "&Delta;" },
			{ "δ", "&Delta;" },
			{ "δ", "&delta;" },
			{ "Ε", "&Epsilon;" },
			{ "ε", "&epsilon;" },
			{ "Ζ", "&Zeta;" },
			{ "ζ", "&zeta;" },
			{ "Η", "&Eta;" },
			{ "η", "&eta;" },
			{ "Θ", "&Theta;" },
			{ "θ", "&theta;" },
			{ "Ι", "&Iota;" },
			{ "ι", "&iota;" },
			{ "Κ", "&Kappa;" },
			{ "κ", "&kappa;" },
			{ "Λ", "&Lambda;" },
			{ "λ", "&lambda;" },
			{ "Μ", "&Mu;" },
			{ "μ", "&mu;" },
			{ "Ν", "&Nu;" },
			{ "ν", "&nu;" },
			{ "Ξ", "&Xi;" },
			{ "ξ", "&xi;" },
			{ "Ο", "&Omicron;" },
			{ "ο", "&omicron;" },
			{ "Π", "&Pi;" },
			{ "π", "&pi;" },
			{ "Ρ", "&Rho;" },
			{ "ρ", "&rho;" },
			{ "Σ", "&Sigma;" },
			{ "ς", "&sigmaf;" },
			{ "σ", "&sigma;" },
			{ "Τ", "&Tau;" },
			{ "τ", "&tau;" },
			{ "Υ", "&Upsilon;" },
			{ "υ", "&upsilon;" },
			{ "Φ", "&Phi;" },
			{ "φ", "&phi;" },
			{ "Χ", "&Chi;" },
			{ "χ", "&chi;" },
			{ "Ψ", "&Psi;" },
			{ "ψ", "&psi;" },
			{ "Ω", "&Omega;" },
			{ "ω", "&omega;" },
			{ "ϑ", "&thetasym;" },
			{ "ϒ", "&upsih;" },
			{ "ϖ", "&piv;" },

			{ _("Mathematical characters"), NULL },
			{ "∀", "&forall;" },
			{ "∂", "&part;" },
			{ "∃", "&exist;" },
			{ "∅", "&empty;" },
			{ "∇", "&nabla;" },
			{ "∈", "&isin;" },
			{ "∉", "&notin;" },
			{ "∋", "&ni;" },
			{ "∏", "&prod;" },
			{ "∑", "&sum;" },
			{ "−", "&minus;" },
			{ "∗", "&lowast;" },
			{ "√", "&radic;" },
			{ "∝", "&prop;" },
			{ "∞", "&infin;" },
			{ "∠", "&ang;" },
			{ "∧", "&and;" },
			{ "∨", "&or;" },
			{ "∩", "&cap;" },
			{ "∪", "&cup;" },
			{ "∫", "&int;" },
			{ "∴", "&there4;" },
			{ "∼", "&sim;" },
			{ "≅", "&cong;" },
			{ "≈", "&asymp;" },
			{ "≠", "&ne;" },
			{ "≡", "&equiv;" },
			{ "≤", "&le;" },
			{ "≥", "&ge;" },
			{ "⊂", "&sub;" },
			{ "⊃", "&sup;" },
			{ "⊄", "&nsub;" },
			{ "⊆", "&sube;" },
			{ "⊇", "&supe;" },
			{ "⊕", "&oplus;" },
			{ "⊗", "&otimes;" },
			{ "⊥", "&perp;" },
			{ "⋅", "&sdot;" },
			{ "◊", "&loz;" },

			{ _("Technical characters"), NULL },
			{ "⌈", "&lceil;" },
			{ "⌉", "&rceil;" },
			{ "⌊", "&lfloor;" },
			{ "⌋", "&rfloor;" },
			{ "〈", "&lang;" },
			{ "〉", "&rang;" },

			{ _("Arrow characters"), NULL },
			{ "←", "&larr;" },
			{ "↑", "&uarr;" },
			{ "→", "&rarr;" },
			{ "↓", "&darr;" },
			{ "↔", "&harr;" },
			{ "↵", "&crarr;" },
			{ "⇐", "&lArr;" },
			{ "⇑", "&uArr;" },
			{ "⇒", "&rArr;" },
			{ "⇓", "&dArr;" },
			{ "⇔", "&hArr;" },

			{ _("Punctuation characters"), NULL },
			{ "–", "&ndash;" },
			{ "—", "&mdash;" },
			{ "‘", "&lsquo;" },
			{ "’", "&rsquo;" },
			{ "‚", "&sbquo;" },
			{ "“", "&ldquo;" },
			{ "”", "&rdquo;" },
			{ "„", "&bdquo;" },
			{ "†", "&dagger;" },
			{ "‡", "&Dagger;" },
			{ "…", "&hellip;" },
			{ "‰", "&permil;" },
			{ "‹", "&lsaquo;" },
			{ "›", "&rsaquo;" },

			{ _("Miscellaneous characters"), NULL },
			{ "•", "&bull;" },
			{ "′", "&prime;" },
			{ "″", "&Prime;" },
			{ "‾", "&oline;" },
			{ "⁄", "&frasl;" },
			{ "℘", "&weierp;" },
			{ "ℑ", "&image;" },
			{ "ℜ", "&real;" },
			{ "™", "&trade;" },
			{ "€", "&euro;" },
			{ "ℵ", "&alefsym;" },
			{ "♠", "&spades;" },
			{ "♣", "&clubs;" },
			{ "♥", "&hearts;" },
			{ "♦", "&diams;" },
			{ "Œ", "&OElig;" },
			{ "œ", "&oelig;" },
			{ "Š", "&Scaron;" },
			{ "š", "&scaron;" },
			{ "Ÿ", "&Yuml;" },
			{ "ƒ", "&fnof;" },
		};

	for (i = 0; i < G_N_ELEMENTS(chars); i++)
	{
		if (chars[i][1] == NULL)
		{	/* add a category */
			gtk_tree_store_append(store, &iter, NULL);
			gtk_tree_store_set(store, &iter, COLUMN_CHARACTER, chars[i][0], -1);
			if (parent_iter != NULL) gtk_tree_iter_free(parent_iter);
			parent_iter = gtk_tree_iter_copy(&iter);
		}
		else
		{	/* add child to parent_iter */
			gtk_tree_store_append(store, &iter, parent_iter);
			gtk_tree_store_set(store, &iter, COLUMN_CHARACTER, chars[i][0],
											 COLUMN_HTML_NAME, chars[i][1], -1);
		}
	}
}


/* just inserts the HTML_NAME coloumn of the selected row at current position
 * returns only TRUE if a valid selection(i.e. no category) could be found */
static gboolean sc_insert(GtkTreeModel *model, GtkTreeIter *iter)
{
	GeanyDocument *doc = p_document->get_current();
	gboolean result = FALSE;

	if (doc != NULL)
	{
		gchar *str;
		gint pos = p_sci->get_current_position(doc->editor->sci);

		gtk_tree_model_get(model, iter, COLUMN_HTML_NAME, &str, -1);
		if (NZV(str))
		{
			p_sci->insert_text(doc->editor->sci, pos, str);
			g_free(str);
			result = TRUE;
		}
	}
	return result;
}


static void sc_on_tools_show_dialog_insert_special_chars_response(GtkDialog *dialog, gint response,
														gpointer user_data)
{
	if (response == GTK_RESPONSE_OK)
	{
		GtkTreeSelection *selection;
		GtkTreeModel *model;
		GtkTreeIter iter;

		selection = gtk_tree_view_get_selection(sc_tree);

		if (gtk_tree_selection_get_selected(selection, &model, &iter))
		{
			/* only hide dialog if selection was not a category */
			if (sc_insert(model, &iter))
				gtk_widget_hide(GTK_WIDGET(dialog));
		}
	}
	else
		gtk_widget_hide(GTK_WIDGET(dialog));
}


static void sc_on_tree_row_activated(GtkTreeView *treeview, GtkTreePath *path,
											  GtkTreeViewColumn *col, gpointer user_data)
{
	GtkTreeIter iter;
	GtkTreeModel *model = GTK_TREE_MODEL(sc_store);

	if (gtk_tree_model_get_iter(model, &iter, path))
	{
		/* only hide dialog if selection was not a category */
		if (sc_insert(model, &iter))
			gtk_widget_hide(sc_dialog);
		else
		{	/* double click on a category to toggle the expand or collapse it */
			if (gtk_tree_view_row_expanded(sc_tree, path))
				gtk_tree_view_collapse_row(sc_tree, path);
			else
				gtk_tree_view_expand_row(sc_tree, path, FALSE);
		}
	}
}


/* Callback when the menu item is clicked */
static void
item_activate(GtkMenuItem *menuitem, gpointer gdata)
{
	tools_show_dialog_insert_special_chars();
}


static void kb_activate(G_GNUC_UNUSED guint key_id)
{
	item_activate(NULL, NULL);
}


/* Called by Geany to initialize the plugin */
void plugin_init(GeanyData *data)
{
	GtkWidget *menu_item;
	const gchar *menu_text = _("_Insert Special HTML Characters");
	gchar *kb_label = _("Insert Special HTML Characters");

	/* Add an item to the Tools menu */
	menu_item = gtk_menu_item_new_with_mnemonic(menu_text);
	gtk_widget_show(menu_item);
	gtk_container_add(GTK_CONTAINER(geany->main_widgets->tools_menu), menu_item);
	g_signal_connect(menu_item, "activate", G_CALLBACK(item_activate), NULL);

	/* disable menu_item when there are no documents open */
	p_ui->add_document_sensitive(menu_item);
	main_menu_item = menu_item;

	/* setup keybindings */
	p_keybindings->set_item(plugin_key_group, KB_INSERT_HTML_CHARS, kb_activate,
		0, 0, "insert_html_chars", kb_label, menu_item);
}


/* Destroy widgets */
void plugin_cleanup(void)
{
	gtk_widget_destroy(main_menu_item);

	if (sc_dialog != NULL)
		gtk_widget_destroy(sc_dialog);
}