/**
 * \file FormGraphics.C
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Baruch Even
 * \author Herbert Voß
 * \author Rob Lahaye
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "FormGraphics.h"
#include "ControlGraphics.h"
#include "forms/form_graphics.h"

#include "controllers/helper_funcs.h"

#include "checkedwidgets.h"
#include "input_validators.h"
#include "Tooltips.h"
#include "xforms_helpers.h"
#include "xformsBC.h"

#include "lyxrc.h" // for lyxrc.display_graphics

#include "insets/insetgraphicsParams.h"

#include "frontends/Alert.h"

#include "support/lyxlib.h"  // for float_equal
#include "support/convert.h"

#include "lyx_forms.h"

#include <cmath>

#ifndef CXX_GLOBAL_CSTD
using std::floor;
#endif

using std::endl;

using std::vector;
using std::string;

namespace lyx {

using support::bformat;
using support::float_equal;
using support::getStringFromVector;
using support::token;

namespace frontend {

namespace {

// Bound the number of input characters
int const SIZE_MAXDIGITS = 10;
int const FILENAME_MAXCHARS = 1024;

string defaultUnit("cm");

#if FL_VERSION == 0 || (FL_REVISION == 0 && FL_FIXLEVEL < 2)
bool const scalableTabfolders = false;
#else
bool const scalableTabfolders = true;
#endif

} // namespace anon


typedef FormController<ControlGraphics, FormView<FD_graphics> > base_class;

FormGraphics::FormGraphics(Dialog & parent)
	: base_class(parent, _("Graphics"), scalableTabfolders),
	  file_checker_(0)
{}


void FormGraphics::redraw()
{
	if (form() && form()->visible)
		fl_redraw_form(form());
	else
		return;
	FL_FORM * outer_form = fl_get_active_folder(dialog_->tabfolder);
	if (outer_form && outer_form->visible)
		fl_redraw_form(outer_form);
}


void FormGraphics::build()
{
	dialog_.reset(build_graphics(this));

	// Manage the ok, apply, restore and cancel/close buttons
	bcview().setOK(dialog_->button_ok);
	bcview().setApply(dialog_->button_apply);
	bcview().setCancel(dialog_->button_close);
	bcview().setRestore(dialog_->button_restore);

	// The file section.
	file_.reset(build_graphics_file(this));

	// Disable for read-only documents.
	bcview().addReadOnly(file_->button_browse);
	bcview().addReadOnly(file_->check_aspectratio);
	bcview().addReadOnly(file_->check_draft);
	bcview().addReadOnly(file_->check_nounzip);

	file_checker_ = &addCheckedPath(bcview(), true, file_->input_filename);

	// Check validity of "length + unit" input.
	addCheckedGlueLength(bcview(), file_->input_width);
	addCheckedGlueLength(bcview(), file_->input_height);

	// Trigger an input event for cut&paste with middle mouse button.
	setPrehandler(file_->input_filename);
	setPrehandler(file_->input_lyxscale);
	setPrehandler(file_->input_width);
	setPrehandler(file_->input_height);

	// Activate ok/apply immediately upon input.
	fl_set_input_return(file_->input_filename, FL_RETURN_CHANGED);
	fl_set_input_return(file_->input_lyxscale, FL_RETURN_CHANGED);
	fl_set_input_return(file_->input_width, FL_RETURN_CHANGED);
	fl_set_input_return(file_->input_height, FL_RETURN_CHANGED);

	fl_set_input_maxchars(file_->input_filename, FILENAME_MAXCHARS);
	fl_set_input_filter(file_->input_lyxscale, fl_unsigned_int_filter);

	// Width default is scaling: use unsigned float filter.
	fl_set_input_filter(file_->input_width, fl_unsigned_float_filter);
	fl_set_input_maxchars(file_->input_height, SIZE_MAXDIGITS);

	string const display_List =
		_("Default|Monochrome|Grayscale|Color|Do not display");
	fl_addto_choice(file_->choice_display, display_List.c_str());

	string const height_list = buildChoiceLengthString();
	string const width_list = bformat(_("Scale%%%%|%1$s"), height_list);

	fl_addto_choice(file_->choice_width, width_list.c_str());
	fl_addto_choice(file_->choice_height, height_list.c_str());

	// set up the tooltips for the filesection
	string str = _("The file you want to insert.");
	tooltips().init(file_->input_filename, str);
	str = _("Browse the directories.");
	tooltips().init(file_->button_browse, str);

	str = _("Scale the image to inserted percentage value.");
	tooltips().init(file_->input_lyxscale, str);
	str = _("Select display mode for this image.");
	tooltips().init(file_->choice_display, str);

	str = _("Set the image width to the inserted value.");
	tooltips().init(file_->input_width, str);
	// xgettext:no-c-format
	str = _("Select unit for width; Scale% for scaling whole image.");
	tooltips().init(file_->choice_width, str);
	str = _("Set the image height to the inserted value.");
	tooltips().init(file_->input_height, str);
	str = _("Select unit for height.");
	tooltips().init(file_->choice_height, str);
	str = _("Do not distort the image. "
		"Keep image within \"width\" by \"height\" and obey "
		"aspect ratio.");
	tooltips().init(file_->check_aspectratio, str);
	str = _("Pass a filename like \"file.eps.gz\" to the LaTeX output. "
		"Useful when LaTeX should unzip the file. Needs an additional "
		"file like \"file.eps.bb\" which holds the values for "
		"the bounding box.");
	tooltips().init(file_->check_nounzip, str);
	str = _("Show image only as a rectangle of the original size.");
	tooltips().init(file_->check_draft, str);

	// the bounding box selection
	bbox_.reset(build_graphics_bbox(this));

	// disable for read-only documents
	bcview().addReadOnly(bbox_->button_getBB);
	bcview().addReadOnly(bbox_->check_clip);

	// check validity of "length + unit" input
	addCheckedLyXLength(bcview(), bbox_->input_bb_x1, bbox_->text_X);

	// trigger an input event for cut&paste with middle mouse button.
	setPrehandler(bbox_->input_bb_x0);
	setPrehandler(bbox_->input_bb_y0);
	setPrehandler(bbox_->input_bb_x1);
	setPrehandler(bbox_->input_bb_y1);

	// for activate ok/apply immediately upon input
	fl_set_input_return(bbox_->input_bb_x0, FL_RETURN_CHANGED);
	fl_set_input_return(bbox_->input_bb_y0, FL_RETURN_CHANGED);
	fl_set_input_return(bbox_->input_bb_x1, FL_RETURN_CHANGED);
	fl_set_input_return(bbox_->input_bb_y1, FL_RETURN_CHANGED);

	fl_set_input_filter(bbox_->input_bb_x0, fl_unsigned_float_filter);
	fl_set_input_filter(bbox_->input_bb_y0, fl_unsigned_float_filter);
	fl_set_input_filter(bbox_->input_bb_y1, fl_unsigned_float_filter);

	string const bb_units = getStringFromVector(getBBUnits(), "|");
	fl_addto_choice(bbox_->choice_bb_units, bb_units.c_str());

	// set up the tooltips for the bounding-box-section
	str = _("The lower left x-value of the bounding box.");
	tooltips().init(bbox_->input_bb_x0, str);
	str = _("The lower left y-value of the bounding box.");
	tooltips().init(bbox_->input_bb_y0, str);
	str = _("The upper right x-value of the bounding box; "
		"only this input field allows length + unit, e.g. 5cm "
		"and sets the unit for the other input fields.");
	tooltips().init(bbox_->input_bb_x1, str);
	str = _("The upper right y-value of the bounding box.");
	tooltips().init(bbox_->input_bb_y1, str);
	str = _("Select unit for the bounding box values.");
	tooltips().init(bbox_->choice_bb_units, str);

	str = _("Read the image coordinates new from file. For (e)ps-file "
		"the bounding box is read, otherwise the imagesize in pixels. "
		"Default unit is \"bp\", the PostScript's b(ig) p(oint).");
	tooltips().init(bbox_->button_getBB, str);

	str = _("Clip image to the bounding box values.");
	tooltips().init(bbox_->check_clip, str);

	// the extra section
	extra_.reset(build_graphics_extra(this));

	// disable for read-only documents
	bcview().addReadOnly(extra_->input_rotate_angle);
	bcview().addReadOnly(extra_->choice_origin);
	bcview().addReadOnly(extra_->check_subcaption);
	bcview().addReadOnly(extra_->input_special);

	// trigger an input event for cut&paste with middle mouse button.
	setPrehandler(extra_->input_rotate_angle);
	setPrehandler(extra_->input_subcaption);
	setPrehandler(extra_->input_special);

	fl_set_input_return(extra_->input_rotate_angle, FL_RETURN_CHANGED);
	fl_set_input_return(extra_->input_subcaption, FL_RETURN_CHANGED);
	fl_set_input_return(extra_->input_special, FL_RETURN_CHANGED);

	fl_set_input_filter(extra_->input_rotate_angle, fl_float_filter);

	vector<RotationOriginPair> origindata = getRotationOriginData();

	// Store the identifiers for later
	origins_ = getSecond(origindata);

	string const choice = getStringFromVector(getFirst(origindata), "|");
	fl_addto_choice(extra_->choice_origin, choice.c_str());

	// set up the tooltips for the extra section
	str = _("Insert the rotation angle in degrees. "
		"Positive value rotates anti-clockwise, "
		"negative value clockwise.");
	tooltips().init(extra_->input_rotate_angle, str);
	str = _("Insert the point of origin for rotation.");
	tooltips().init(extra_->choice_origin, str);
	str = _("Enables use of subfigure with its own caption.");
	tooltips().init(extra_->check_subcaption, str);
	str = _("Insert the optional subfigure caption.");
	tooltips().init(extra_->input_subcaption, str);
	str = _("Add any additional LaTeX option, which is defined in the "
		"graphicx-package and not mentioned in the gui's tabfolders.");
	tooltips().init(extra_->input_special, str);

	// Enable the tabfolder to be rescaled correctly.
	if (scalableTabfolders)
		fl_set_tabfolder_autofit(dialog_->tabfolder, FL_FIT);

	// Stack tabs
	fl_addto_tabfolder(dialog_->tabfolder, _("File").c_str(),
			   file_->form);
	fl_addto_tabfolder(dialog_->tabfolder, _("Bounding Box").c_str(),
			   bbox_->form);
	fl_addto_tabfolder(dialog_->tabfolder, _("Extra").c_str(),
			   extra_->form);

	// set the right default unit
	defaultUnit = "cm";
	switch (lyxrc.default_papersize) {
	case PAPER_USLETTER:
	case PAPER_USLEGAL:
	case PAPER_USEXECUTIVE:
		defaultUnit = "in";
		break;
	default:
		break;
	}
}


void FormGraphics::apply()
{
	// Create the parameters structure and fill the data from the dialog.
	InsetGraphicsParams & igp = controller().params();

	// the file section
	igp.filename.set(getString(file_->input_filename),
			 kernel().bufferFilepath());

	igp.lyxscale = convert<int>(getString(file_->input_lyxscale));
	if (igp.lyxscale == 0) {
		igp.lyxscale = 100;
	}

	switch (fl_get_choice(file_->choice_display)) {
	case 5:
		igp.display = graphics::NoDisplay;
		break;
	case 4:
		igp.display = graphics::ColorDisplay;
		break;
	case 3:
		igp.display = graphics::GrayscaleDisplay;
		break;
	case 2:
		igp.display = graphics::MonochromeDisplay;
		break;
	case 1:
		igp.display = graphics::DefaultDisplay;
	}

	// first item in choice_width means scaling
	if (fl_get_choice(file_->choice_width) == 1) {
		igp.scale = getString(file_->input_width);
		if (igp.scale.empty()
			|| float_equal(convert<double>(igp.scale), 0.0, 0.05)
			|| float_equal(convert<double>(igp.scale), 100.0, 0.05)) {
			igp.scale.erase();
		}
		igp.width = LyXLength();
	} else {
		igp.scale.erase();
		igp.width = LyXLength(getLengthFromWidgets(file_->input_width,
							   file_->choice_width));
	}
	igp.height = LyXLength(getLengthFromWidgets(file_->input_height,
						    file_->choice_height));
	igp.keepAspectRatio = fl_get_button(file_->check_aspectratio);

	igp.draft = fl_get_button(file_->check_draft);
	igp.noUnzip = fl_get_button(file_->check_nounzip);

	// the bb section
	if (!controller().bbChanged) {
		// don't write anything
		igp.bb.erase();
	} else {
		// allow length + unit input only for x1 input field
		string x1_str = "0";
		if (!getString(bbox_->input_bb_x1).empty()) {
			x1_str = getLengthFromWidgets(bbox_->input_bb_x1,
						      bbox_->choice_bb_units);
			LyXLength x1 = LyXLength(x1_str);
			x1_str = x1.asString();

			string unit;
			switch (x1.unit()) {
			case LyXLength::IN:
				unit = "in";
				break;
			case LyXLength::MM:
				unit = "mm";
				break;
			case LyXLength::CM:
				unit = "cm";
				break;
			case LyXLength::BP:
			default:
				unit = "bp";
			}
			fl_set_choice_text(bbox_->choice_bb_units, unit.c_str());
		}

		string bb;
		if (getString(bbox_->input_bb_x0).empty())
			bb = "0";
		else
			bb = getLengthFromWidgets(bbox_->input_bb_x0,
						  bbox_->choice_bb_units);

		bb += ' ';

		if (getString(bbox_->input_bb_y0).empty())
			bb += '0';
		else
			bb += getLengthFromWidgets(bbox_->input_bb_y0,
						  bbox_->choice_bb_units);

		bb += ' ' + x1_str + ' ';

		if (getString(bbox_->input_bb_y1).empty())
			bb += '0';
		else
			bb += getLengthFromWidgets(bbox_->input_bb_y1,
						   bbox_->choice_bb_units);

		igp.bb = bb;
	}
	igp.clip = fl_get_button(bbox_->check_clip);

	// the extra section
	igp.rotateAngle = getString(extra_->input_rotate_angle);

	// map angle into -360 (clock-wise) to +360 (counter clock-wise)
	double rotAngle = convert<double>(igp.rotateAngle);
	if (std::abs(rotAngle) > 360.0) {
		 rotAngle -= 360.0 * floor(rotAngle / 360.0);
		 igp.rotateAngle = convert<string>(rotAngle);
	}

	fl_set_input(extra_->input_rotate_angle, igp.rotateAngle.c_str());

	int const origin_pos = fl_get_choice(extra_->choice_origin);
	if (origin_pos == 0) {
		igp.rotateOrigin.erase();
	} else {
		igp.rotateOrigin = origins_[origin_pos - 1];
	}

	igp.subcaption = fl_get_button(extra_->check_subcaption);
	igp.subcaptionText = getString(extra_->input_subcaption);

	igp.special = getString(extra_->input_special);
}


void FormGraphics::update()
{
	file_checker_->setChecker(kernel().docType(), lyxrc);

	// Update dialog with details from inset
	InsetGraphicsParams & igp = controller().params();

	// the file section
	string const name =
		igp.filename.outputFilename(kernel().bufferFilepath());
	fl_set_input(file_->input_filename, name.c_str());
	fl_set_input(file_->input_lyxscale, convert<string>(igp.lyxscale).c_str());

	switch (igp.display) {
	case graphics::NoDisplay:
		fl_set_choice(file_->choice_display, 5);
		break;
	case graphics::ColorDisplay:
		fl_set_choice(file_->choice_display, 4);
		break;
	case graphics::GrayscaleDisplay:
		fl_set_choice(file_->choice_display, 3);
		break;
	case graphics::MonochromeDisplay:
		fl_set_choice(file_->choice_display, 2);
		break;
	case graphics::DefaultDisplay:
		fl_set_choice(file_->choice_display, 1);
	}

	// set width input fields according to scaling or width/height input
	if (!igp.scale.empty() && !float_equal(convert<double>(igp.scale), 0.0, 0.05)) {
		fl_set_input_filter(file_->input_width, fl_unsigned_float_filter);
		fl_set_input_maxchars(file_->input_width, 0);
		fl_set_input(file_->input_width, igp.scale.c_str());
		fl_set_choice(file_->choice_width, 1);
	} else {
		fl_set_input_filter(file_->input_width, NULL);
		fl_set_input_maxchars(file_->input_width, SIZE_MAXDIGITS);
		updateWidgetsFromLength(file_->input_width, file_->choice_width,
					igp.width, defaultUnit);
	}

	updateWidgetsFromLength(file_->input_height, file_->choice_height,
				igp.height, defaultUnit);

	// disable height input in case of scaling
	bool const disable_height = (!igp.scale.empty()
		&& !float_equal(convert<double>(igp.scale), 0.0, 0.05));
	setEnabled(file_->input_height, !disable_height);
	setEnabled(file_->choice_height, !disable_height);

	fl_set_button(file_->check_aspectratio, igp.keepAspectRatio);
	fl_set_button(file_->check_draft, igp.draft);
	fl_set_button(file_->check_nounzip, igp.noUnzip);

	// disable aspectratio button in case of scaling or one of width/height
	// is empty
	bool const disable_aspectRatio = disable_height ||
				getString(file_->input_width).empty() ||
				getString(file_->input_height).empty();
	setEnabled(file_->check_aspectratio, !disable_aspectRatio);

	// the bb section
	// set the bounding box values, if exists. First we need the whole
	// path, because the controller knows nothing about the doc-dir
	updateBB(igp.filename.absFilename(), igp.bb);
	fl_set_button(bbox_->check_clip, igp.clip);

	// the extra section
	fl_set_input(extra_->input_rotate_angle, igp.rotateAngle.c_str());

	int origin_pos = 1;
	if (!igp.rotateOrigin.empty()) {
		origin_pos += findPos(origins_, igp.rotateOrigin);
	}
	fl_set_choice(extra_->choice_origin, origin_pos);

	fl_set_button(extra_->check_subcaption, igp.subcaption);
	fl_set_input(extra_->input_subcaption, igp.subcaptionText.c_str());
	setEnabled(extra_->input_subcaption,
		   fl_get_button(extra_->check_subcaption));
	fl_set_input(extra_->input_special, igp.special.c_str());

	// open dialog in the file-tab, whenever filename is empty
	if (igp.filename.empty()) {
		fl_set_folder(dialog_->tabfolder, file_->form);
	}
}


void FormGraphics::updateBB(string const & filename, string const & bb_inset)
{
	// Update dialog with details from inset
	// set the bounding box values, if exists. First we need the whole
	// path, because the controller knows nothing about the doc-dir
	controller().bbChanged = false;
	if (bb_inset.empty()) {
		lyxerr[Debug::GRAPHICS]
			<< "FormGraphics::updateBB() [no BoundingBox]" << endl;
		string const bb = controller().readBB(filename);
		if (!bb.empty()) {
			// get the values from the file
			// in this case we always have the point-unit
			fl_set_input(bbox_->input_bb_x0,
				     token(bb,' ',0).c_str());
			fl_set_input(bbox_->input_bb_y0,
				     token(bb,' ',1).c_str());
			fl_set_input(bbox_->input_bb_x1,
				     token(bb,' ',2).c_str());
			fl_set_input(bbox_->input_bb_y1,
				     token(bb,' ',3).c_str());

		} else {
			// no bb from file
			fl_set_input(bbox_->input_bb_x0, bb.c_str());
			fl_set_input(bbox_->input_bb_y0, bb.c_str());
			fl_set_input(bbox_->input_bb_x1, bb.c_str());
			fl_set_input(bbox_->input_bb_y1, bb.c_str());
		}
		// "bp"
		fl_set_choice(bbox_->choice_bb_units, 1);

	} else {
		// get the values from the inset
		lyxerr[Debug::GRAPHICS]
			<< "FormGraphics::updateBB(): igp has BoundingBox"
			<< " ["<< bb_inset << "]" << endl;
		controller().bbChanged = true;

		LyXLength anyLength;
		anyLength = LyXLength(token(bb_inset,' ',0));
		updateWidgetsFromLength(bbox_->input_bb_x0,
					bbox_->choice_bb_units,anyLength,"bp");
		anyLength = LyXLength(token(bb_inset,' ',1));
		updateWidgetsFromLength(bbox_->input_bb_y0,
					bbox_->choice_bb_units,anyLength,"bp");
		anyLength = LyXLength(token(bb_inset,' ',2));
		updateWidgetsFromLength(bbox_->input_bb_x1,
					bbox_->choice_bb_units,anyLength,"bp");
		anyLength = LyXLength(token(bb_inset,' ',3));
		updateWidgetsFromLength(bbox_->input_bb_y1,
					bbox_->choice_bb_units,anyLength,"bp");
	}
}


ButtonPolicy::SMInput FormGraphics::input(FL_OBJECT * ob, long)
{
	ButtonPolicy::SMInput activate = ButtonPolicy::SMI_VALID;

	// the file section
	if (ob == file_->button_browse) {
		activate = ButtonPolicy::SMI_NOOP;

		// Get the filename from the dialog
		string const in_name = getString(file_->input_filename);
		string const out_name = controller().browse(in_name);
		lyxerr[Debug::GRAPHICS]
			<< "[FormGraphics]out_name: " << out_name << endl;
		if (out_name != in_name && !out_name.empty()) {
			fl_set_input(file_->input_filename, out_name.c_str());
		}
		if (controller().isFilenameValid(out_name) &&
		    !controller().bbChanged) {
			updateBB(out_name, string());
		}
	} else if (ob == file_->input_width || ob == file_->input_height) {
		// disable aspectratio button in case of scaling or one of
		// width/height is empty
		bool const disable = fl_get_choice(file_->choice_width) == 1 ||
				    getString(file_->input_width).empty() ||
				    getString(file_->input_height).empty();
		setEnabled(file_->check_aspectratio, !disable);
	} else if (ob == file_->choice_width) {
		// disable height input in case of scaling
		bool const scaling = fl_get_choice(file_->choice_width) == 1;
		setEnabled(file_->input_height, !scaling);
		setEnabled(file_->choice_height, !scaling);

		// allow only integer intput for scaling; float otherwise
		if (scaling) {
			fl_set_input_filter(file_->input_width, fl_unsigned_float_filter);
			fl_set_input_maxchars(file_->input_width, 0);
		} else {
			fl_set_input_filter(file_->input_width, NULL);
			fl_set_input_maxchars(file_->input_width, SIZE_MAXDIGITS);
		}

		// disable aspectratio button in case of scaling or height
		// input is empty
		bool const disable_aspectratio =
			scaling || getString(file_->input_height).empty();
		setEnabled(file_->check_aspectratio, !disable_aspectratio);
	// the bb section
	} else if (!controller().bbChanged &&
		   (ob == bbox_->check_clip  || ob == bbox_->choice_bb_units ||
		    ob == bbox_->input_bb_x0 || ob == bbox_->input_bb_y0 ||
		    ob == bbox_->input_bb_x1 || ob == bbox_->input_bb_y1)) {
		controller().bbChanged = true;
	} else if (ob == bbox_->button_getBB) {
		string const filename = getString(file_->input_filename);
		if (!filename.empty()) {
			string bb = controller().readBB(filename);
			if (!bb.empty()) {
				fl_set_input(bbox_->input_bb_x0, token(bb,' ',0).c_str());
				fl_set_input(bbox_->input_bb_y0, token(bb,' ',1).c_str());
				fl_set_input(bbox_->input_bb_x1, token(bb,' ',2).c_str());
				fl_set_input(bbox_->input_bb_y1, token(bb,' ',3).c_str());
				fl_set_choice_text(bbox_->choice_bb_units, "bp");
			}
			controller().bbChanged = false;
		} else {
			fl_set_input(bbox_->input_bb_x0, "");
			fl_set_input(bbox_->input_bb_y0, "");
			fl_set_input(bbox_->input_bb_x1, "");
			fl_set_input(bbox_->input_bb_y1, "");
			fl_set_choice_text(bbox_->choice_bb_units, "bp");
		}
	// the extra section
	} else if (ob == extra_->check_subcaption) {
		setEnabled(extra_->input_subcaption,
			   fl_get_button(extra_->check_subcaption));

	} else if (ob == file_->button_edit) {
		activate = ButtonPolicy::SMI_NOOP;
		controller().editGraphics();
	}


	return activate;
}

} // namespace frontend
} // namespace lyx
