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-rw-r--r--src/ui/drag-and-drop.cpp464
1 files changed, 464 insertions, 0 deletions
diff --git a/src/ui/drag-and-drop.cpp b/src/ui/drag-and-drop.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/**
+ * @file
+ * Drag and drop of drawings onto canvas.
+ */
+
+/* Authors:
+ *
+ * Copyright (C) Tavmjong Bah 2019
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "drag-and-drop.h"
+
+#include <glibmm/i18n.h> // Internationalization
+
+#include "desktop-style.h"
+#include "document.h"
+#include "document-undo.h"
+#include "gradient-drag.h"
+#include "file.h"
+#include "selection.h"
+#include "style.h"
+#include "layer-manager.h"
+
+#include "extension/db.h"
+#include "extension/find_extension_by_mime.h"
+
+#include "object/sp-shape.h"
+#include "object/sp-text.h"
+#include "object/sp-flowtext.h"
+
+#include "path/path-util.h"
+
+#include "svg/svg-color.h" // write color
+
+#include "ui/clipboard.h"
+#include "ui/interface.h"
+#include "ui/tools/tool-base.h"
+#include "ui/widget/canvas.h" // Target, canvas to world transform.
+
+#include "widgets/desktop-widget.h"
+#include "widgets/ege-paint-def.h"
+
+using Inkscape::DocumentUndo;
+
+/* Drag and Drop */
+enum ui_drop_target_info {
+ URI_LIST,
+ SVG_XML_DATA,
+ SVG_DATA,
+ PNG_DATA,
+ JPEG_DATA,
+ IMAGE_DATA,
+ APP_X_INKY_COLOR,
+ APP_X_COLOR,
+ APP_OSWB_COLOR,
+ APP_X_INK_PASTE
+};
+
+static GtkTargetEntry ui_drop_target_entries [] = {
+ // clang-format off
+ {(gchar *)"text/uri-list", 0, URI_LIST },
+ {(gchar *)"image/svg+xml", 0, SVG_XML_DATA },
+ {(gchar *)"image/svg", 0, SVG_DATA },
+ {(gchar *)"image/png", 0, PNG_DATA },
+ {(gchar *)"image/jpeg", 0, JPEG_DATA },
+ {(gchar *)"application/x-oswb-color", 0, APP_OSWB_COLOR },
+ {(gchar *)"application/x-color", 0, APP_X_COLOR },
+ {(gchar *)"application/x-inkscape-paste", 0, APP_X_INK_PASTE }
+ // clang-format on
+};
+
+static GtkTargetEntry *completeDropTargets = nullptr;
+static int completeDropTargetsCount = 0;
+
+static guint nui_drop_target_entries = G_N_ELEMENTS(ui_drop_target_entries);
+
+/* Drag and Drop */
+static
+void
+ink_drag_data_received(GtkWidget *widget,
+ GdkDragContext *drag_context,
+ gint x, gint y,
+ GtkSelectionData *data,
+ guint info,
+ guint /*event_time*/,
+ gpointer user_data)
+{
+ auto dtw = static_cast<SPDesktopWidget *>(user_data);
+ SPDesktop *desktop = dtw->desktop;
+ SPDocument *doc = desktop->doc();
+
+ switch (info) {
+ case APP_X_COLOR:
+ {
+ int destX = 0;
+ int destY = 0;
+ auto canvas = dtw->get_canvas();
+ gtk_widget_translate_coordinates( widget, GTK_WIDGET(canvas->gobj()), x, y, &destX, &destY );
+ Geom::Point where( canvas->canvas_to_world(Geom::Point(destX, destY)));
+ Geom::Point const button_dt(desktop->w2d(where));
+ Geom::Point const button_doc(desktop->dt2doc(button_dt));
+
+ if ( gtk_selection_data_get_length (data) == 8 ) {
+ gchar colorspec[64] = {0};
+ // Careful about endian issues.
+ guint16* dataVals = (guint16*)gtk_selection_data_get_data (data);
+ sp_svg_write_color( colorspec, sizeof(colorspec),
+ SP_RGBA32_U_COMPOSE(
+ 0x0ff & (dataVals[0] >> 8),
+ 0x0ff & (dataVals[1] >> 8),
+ 0x0ff & (dataVals[2] >> 8),
+ 0xff // can't have transparency in the color itself
+ //0x0ff & (data->data[3] >> 8),
+ ));
+
+ SPItem *item = desktop->getItemAtPoint( where, true );
+
+ bool consumed = false;
+ if (desktop->event_context && desktop->event_context->get_drag()) {
+ consumed = desktop->event_context->get_drag()->dropColor(item, colorspec, button_dt);
+ if (consumed) {
+ DocumentUndo::done( doc , _("Drop color on gradient"), "" );
+ desktop->event_context->get_drag()->updateDraggers();
+ }
+ }
+
+ //if (!consumed && tools_active(desktop, TOOLS_TEXT)) {
+ // consumed = sp_text_context_drop_color(c, button_doc);
+ // if (consumed) {
+ // SPDocumentUndo::done( doc , _("Drop color on gradient stop"), "");
+ // }
+ //}
+
+ if (!consumed && item) {
+ bool fillnotstroke = (gdk_drag_context_get_actions (drag_context) != GDK_ACTION_MOVE);
+ if (fillnotstroke &&
+ (SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))) {
+ Path *livarot_path = Path_for_item(item, true, true);
+ livarot_path->ConvertWithBackData(0.04);
+
+ std::optional<Path::cut_position> position = get_nearest_position_on_Path(livarot_path, button_doc);
+ if (position) {
+ Geom::Point nearest = get_point_on_Path(livarot_path, position->piece, position->t);
+ Geom::Point delta = nearest - button_doc;
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ delta = desktop->d2w(delta);
+ double stroke_tolerance =
+ ( !item->style->stroke.isNone() ?
+ desktop->current_zoom() *
+ item->style->stroke_width.computed *
+ item->i2dt_affine().descrim() * 0.5
+ : 0.0)
+ + prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+
+ if (Geom::L2 (delta) < stroke_tolerance) {
+ fillnotstroke = false;
+ }
+ }
+ delete livarot_path;
+ }
+
+ SPCSSAttr *css = sp_repr_css_attr_new();
+ sp_repr_css_set_property( css, fillnotstroke ? "fill":"stroke", colorspec );
+
+ sp_desktop_apply_css_recursive( item, css, true );
+ item->updateRepr();
+
+ DocumentUndo::done( doc , _("Drop color"), "" );
+ }
+ }
+ }
+ break;
+
+ case APP_OSWB_COLOR:
+ {
+ bool worked = false;
+ Glib::ustring colorspec;
+ if ( gtk_selection_data_get_format (data) == 8 ) {
+ ege::PaintDef color;
+ worked = color.fromMIMEData("application/x-oswb-color",
+ reinterpret_cast<char const *>(gtk_selection_data_get_data (data)),
+ gtk_selection_data_get_length (data),
+ gtk_selection_data_get_format (data));
+ if ( worked ) {
+ if ( color.getType() == ege::PaintDef::CLEAR ) {
+ colorspec = ""; // TODO check if this is sufficient
+ } else if ( color.getType() == ege::PaintDef::NONE ) {
+ colorspec = "none";
+ } else {
+ unsigned int r = color.getR();
+ unsigned int g = color.getG();
+ unsigned int b = color.getB();
+
+ SPGradient* matches = nullptr;
+ std::vector<SPObject *> gradients = doc->getResourceList("gradient");
+ for (auto gradient : gradients) {
+ SPGradient* grad = SP_GRADIENT(gradient);
+ if ( color.descr == grad->getId() ) {
+ if ( grad->hasStops() ) {
+ matches = grad;
+ break;
+ }
+ }
+ }
+ if (matches) {
+ colorspec = "url(#";
+ colorspec += matches->getId();
+ colorspec += ")";
+ } else {
+ gchar* tmp = g_strdup_printf("#%02x%02x%02x", r, g, b);
+ colorspec = tmp;
+ g_free(tmp);
+ }
+ }
+ }
+ }
+ if ( worked ) {
+ int destX = 0;
+ int destY = 0;
+ auto canvas = dtw->get_canvas();
+ gtk_widget_translate_coordinates( widget, GTK_WIDGET(canvas->gobj()), x, y, &destX, &destY );
+ Geom::Point where( canvas->canvas_to_world(Geom::Point(destX, destY)));
+ Geom::Point const button_dt(desktop->w2d(where));
+ Geom::Point const button_doc(desktop->dt2doc(button_dt));
+
+ SPItem *item = desktop->getItemAtPoint( where, true );
+
+ bool consumed = false;
+ if (desktop->event_context && desktop->event_context->get_drag()) {
+ consumed = desktop->event_context->get_drag()->dropColor(item, colorspec.c_str(), button_dt);
+ if (consumed) {
+ DocumentUndo::done( doc, _("Drop color on gradient"), "" );
+ desktop->event_context->get_drag()->updateDraggers();
+ }
+ }
+
+ if (!consumed && item) {
+ bool fillnotstroke = (gdk_drag_context_get_actions (drag_context) != GDK_ACTION_MOVE);
+ if (fillnotstroke &&
+ (SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))) {
+ Path *livarot_path = Path_for_item(item, true, true);
+ livarot_path->ConvertWithBackData(0.04);
+
+ std::optional<Path::cut_position> position = get_nearest_position_on_Path(livarot_path, button_doc);
+ if (position) {
+ Geom::Point nearest = get_point_on_Path(livarot_path, position->piece, position->t);
+ Geom::Point delta = nearest - button_doc;
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ delta = desktop->d2w(delta);
+ double stroke_tolerance =
+ ( !item->style->stroke.isNone() ?
+ desktop->current_zoom() *
+ item->style->stroke_width.computed *
+ item->i2dt_affine().descrim() * 0.5
+ : 0.0)
+ + prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+
+ if (Geom::L2 (delta) < stroke_tolerance) {
+ fillnotstroke = false;
+ }
+ }
+ delete livarot_path;
+ }
+
+ SPCSSAttr *css = sp_repr_css_attr_new();
+ sp_repr_css_set_property( css, fillnotstroke ? "fill":"stroke", colorspec.c_str() );
+
+ sp_desktop_apply_css_recursive( item, css, true );
+ item->updateRepr();
+
+ DocumentUndo::done( doc, _("Drop color"), "" );
+ }
+ }
+ }
+ break;
+
+ case SVG_DATA:
+ case SVG_XML_DATA: {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ prefs->setBool("/options/onimport", true);
+ gchar *svgdata = (gchar *)gtk_selection_data_get_data (data);
+
+ Inkscape::XML::Document *rnewdoc = sp_repr_read_mem(svgdata, gtk_selection_data_get_length (data), SP_SVG_NS_URI);
+
+ if (rnewdoc == nullptr) {
+ sp_ui_error_dialog(_("Could not parse SVG data"));
+ return;
+ }
+
+ Inkscape::XML::Node *repr = rnewdoc->root();
+ gchar const *style = repr->attribute("style");
+
+
+ Inkscape::XML::Document * xml_doc = doc->getReprDoc();
+ Inkscape::XML::Node *newgroup = xml_doc->createElement("svg:g");
+ newgroup->setAttribute("style", style);
+ for (Inkscape::XML::Node *child = repr->firstChild(); child != nullptr; child = child->next()) {
+ Inkscape::XML::Node *newchild = child->duplicate(xml_doc);
+ newgroup->appendChild(newchild);
+ }
+
+ Inkscape::GC::release(rnewdoc);
+
+ // Add it to the current layer
+
+ // Greg's edits to add intelligent positioning of svg drops
+ SPObject *new_obj = nullptr;
+ new_obj = desktop->layerManager().currentLayer()->appendChildRepr(newgroup);
+
+ Inkscape::Selection *selection = desktop->getSelection();
+ selection->set(SP_ITEM(new_obj));
+
+ // move to mouse pointer
+ {
+ desktop->getDocument()->ensureUpToDate();
+ Geom::OptRect sel_bbox = selection->visualBounds();
+ if (sel_bbox) {
+ Geom::Point m( desktop->point() - sel_bbox->midpoint() );
+ selection->moveRelative(m, false);
+ }
+ }
+
+ Inkscape::GC::release(newgroup);
+ DocumentUndo::done( doc, _("Drop SVG"), "" );
+ prefs->setBool("/options/onimport", false);
+ break;
+ }
+
+ case URI_LIST: {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ prefs->setBool("/options/onimport", true);
+ gchar *uri = (gchar *)gtk_selection_data_get_data (data);
+ sp_ui_import_files(uri);
+ prefs->setBool("/options/onimport", false);
+ break;
+ }
+
+ case APP_X_INK_PASTE: {
+ Inkscape::UI::ClipboardManager *cm = Inkscape::UI::ClipboardManager::get();
+ cm->paste(desktop);
+ DocumentUndo::done( doc, _("Drop Symbol"), "" );
+ break;
+ }
+
+ case PNG_DATA:
+ case JPEG_DATA:
+ case IMAGE_DATA: {
+ Inkscape::Extension::Extension *ext = Inkscape::Extension::find_by_mime((info == JPEG_DATA ? "image/jpeg" : "image/png"));
+ bool save = (strcmp(ext->get_param_optiongroup("link"), "embed") == 0);
+ ext->set_param_optiongroup("link", "embed");
+ ext->set_gui(false);
+
+ gchar *filename = g_build_filename( g_get_tmp_dir(), "inkscape-dnd-import", nullptr );
+ g_file_set_contents(filename,
+ reinterpret_cast<gchar const *>(gtk_selection_data_get_data (data)),
+ gtk_selection_data_get_length (data),
+ nullptr);
+ file_import(doc, filename, ext);
+ g_free(filename);
+
+ ext->set_param_optiongroup("link", save ? "embed" : "link");
+ ext->set_gui(true);
+ DocumentUndo::done( doc, _("Drop bitmap image"), "" );
+ break;
+ }
+ }
+}
+
+#if 0
+static
+void ink_drag_motion( GtkWidget */*widget*/,
+ GdkDragContext */*drag_context*/,
+ gint /*x*/, gint /*y*/,
+ GtkSelectionData */*data*/,
+ guint /*info*/,
+ guint /*event_time*/,
+ gpointer /*user_data*/)
+{
+// SPDocument *doc = SP_ACTIVE_DOCUMENT;
+// SPDesktop *desktop = SP_ACTIVE_DESKTOP;
+
+
+// g_message("drag-n-drop motion (%4d, %4d) at %d", x, y, event_time);
+}
+
+static void ink_drag_leave( GtkWidget */*widget*/,
+ GdkDragContext */*drag_context*/,
+ guint /*event_time*/,
+ gpointer /*user_data*/ )
+{
+// g_message("drag-n-drop leave at %d", event_time);
+}
+#endif
+
+void
+ink_drag_setup(SPDesktopWidget* dtw)
+{
+ if ( completeDropTargets == nullptr || completeDropTargetsCount == 0 )
+ {
+ std::vector<Glib::ustring> types;
+
+ std::vector<Gdk::PixbufFormat> list = Gdk::Pixbuf::get_formats();
+ for (auto one:list) {
+ std::vector<Glib::ustring> typesXX = one.get_mime_types();
+ for (auto i:typesXX) {
+ types.push_back(i);
+ }
+ }
+ completeDropTargetsCount = nui_drop_target_entries + types.size();
+ completeDropTargets = new GtkTargetEntry[completeDropTargetsCount];
+ for ( int i = 0; i < (int)nui_drop_target_entries; i++ ) {
+ completeDropTargets[i] = ui_drop_target_entries[i];
+ }
+ int pos = nui_drop_target_entries;
+
+ for (auto & type : types) {
+ completeDropTargets[pos].target = g_strdup(type.c_str());
+ completeDropTargets[pos].flags = 0;
+ completeDropTargets[pos].info = IMAGE_DATA;
+ pos++;
+ }
+ }
+
+ auto canvas = dtw->get_canvas();
+
+ gtk_drag_dest_set(GTK_WIDGET(canvas->gobj()),
+ GTK_DEST_DEFAULT_ALL,
+ completeDropTargets,
+ completeDropTargetsCount,
+ GdkDragAction(GDK_ACTION_COPY | GDK_ACTION_MOVE));
+
+ g_signal_connect(G_OBJECT(canvas->gobj()),
+ "drag_data_received",
+ G_CALLBACK(ink_drag_data_received),
+ dtw);
+
+#if 0
+ g_signal_connect(G_OBJECT(win->gobj()),
+ "drag_motion",
+ G_CALLBACK(ink_drag_motion),
+ NULL);
+
+ g_signal_connect(G_OBJECT(win->gobj()),
+ "drag_leave",
+ G_CALLBACK(ink_drag_leave),
+ NULL);
+#endif
+}
+
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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