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authorChris Lahey <clahey@src.gnome.org>2000-01-10 12:55:48 +0800
committerChris Lahey <clahey@src.gnome.org>2000-01-10 12:55:48 +0800
commitb2a25c6add10c40eb6d369fdf504f2e7d13d2c97 (patch)
tree4b51232a7a23da925a858c7f52cac5d6d977e309 /widgets/e-text/e-text.c
parent380e084b6b0f856ae70751238fae86fafc9ffdb8 (diff)
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Added minicard and text stuff.
* widgets/Makefile.am: Added minicard and text stuff. * widgets/e-minicard.c, widgets/e-minicard.h, widgets/e-minicard-label.c, widgets/e-minicard-label.h: Added canvas items for the minicard view in the contact manager. * widgets/test-minicard.c, widgets/test-minicard-label.c: Tests for the minicard items. * widgets/e-text.h, widgets/e-text.c: New canvas item. Based on GnomeCanvasText. Adds ellipsis capabilities. Used in e-minicard*.[ch]. * widgets/.cvsignore: Added minicard-test and minicard-label-test. svn path=/trunk/; revision=1552
Diffstat (limited to 'widgets/e-text/e-text.c')
-rw-r--r--widgets/e-text/e-text.c1411
1 files changed, 1411 insertions, 0 deletions
diff --git a/widgets/e-text/e-text.c b/widgets/e-text/e-text.c
new file mode 100644
index 0000000000..b88130e3c8
--- /dev/null
+++ b/widgets/e-text/e-text.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* EText - Text item for evolution.
+ * Copyright (C) 2000 Helix Code, Inc.
+ *
+ * Author: Chris Lahey <clahey@umich.edu>
+ *
+ * A majority of code taken from:
+ *
+ * Text item type for GnomeCanvas widget
+ *
+ * GnomeCanvas is basically a port of the Tk toolkit's most excellent
+ * canvas widget. Tk is copyrighted by the Regents of the University
+ * of California, Sun Microsystems, and other parties.
+ *
+ * Copyright (C) 1998 The Free Software Foundation
+ *
+ * Author: Federico Mena <federico@nuclecu.unam.mx> */
+
+#include <config.h>
+#include <math.h>
+#include "e-text.h"
+#include <gdk/gdkx.h> /* for BlackPixel */
+#include <libart_lgpl/art_affine.h>
+#include <libart_lgpl/art_rgb.h>
+#include <libart_lgpl/art_rgb_bitmap_affine.h>
+
+
+
+/* This defines a line of text */
+struct line {
+ char *text; /* Line's text, it is a pointer into the text->text string */
+ int length; /* Line's length in characters */
+ int width; /* Line's width in pixels */
+ int ellipsis_length; /* Length before adding ellipsis */
+};
+
+
+
+/* Object argument IDs */
+enum {
+ ARG_0,
+ ARG_TEXT,
+ ARG_X,
+ ARG_Y,
+ ARG_FONT,
+ ARG_FONTSET,
+ ARG_FONT_GDK,
+ ARG_ANCHOR,
+ ARG_JUSTIFICATION,
+ ARG_CLIP_WIDTH,
+ ARG_CLIP_HEIGHT,
+ ARG_CLIP,
+ ARG_X_OFFSET,
+ ARG_Y_OFFSET,
+ ARG_FILL_COLOR,
+ ARG_FILL_COLOR_GDK,
+ ARG_FILL_COLOR_RGBA,
+ ARG_FILL_STIPPLE,
+ ARG_TEXT_WIDTH,
+ ARG_TEXT_HEIGHT,
+ ARG_USE_ELLIPSIS,
+ ARG_ELLIPSIS
+};
+
+
+static void e_text_class_init (ETextClass *class);
+static void e_text_init (EText *text);
+static void e_text_destroy (GtkObject *object);
+static void e_text_set_arg (GtkObject *object, GtkArg *arg, guint arg_id);
+static void e_text_get_arg (GtkObject *object, GtkArg *arg, guint arg_id);
+
+static void e_text_update (GnomeCanvasItem *item, double *affine,
+ ArtSVP *clip_path, int flags);
+static void e_text_realize (GnomeCanvasItem *item);
+static void e_text_unrealize (GnomeCanvasItem *item);
+static void e_text_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
+ int x, int y, int width, int height);
+static double e_text_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
+ GnomeCanvasItem **actual_item);
+static void e_text_bounds (GnomeCanvasItem *item,
+ double *x1, double *y1, double *x2, double *y2);
+static void e_text_render (GnomeCanvasItem *item, GnomeCanvasBuf *buf);
+
+static ETextSuckFont *e_suck_font (GdkFont *font);
+static void e_suck_font_free (ETextSuckFont *suckfont);
+
+
+static GnomeCanvasItemClass *parent_class;
+
+
+
+/**
+ * e_text_get_type:
+ * @void:
+ *
+ * Registers the &EText class if necessary, and returns the type ID
+ * associated to it.
+ *
+ * Return value: The type ID of the &EText class.
+ **/
+GtkType
+e_text_get_type (void)
+{
+ static GtkType text_type = 0;
+
+ if (!text_type) {
+ GtkTypeInfo text_info = {
+ "EText",
+ sizeof (EText),
+ sizeof (ETextClass),
+ (GtkClassInitFunc) e_text_class_init,
+ (GtkObjectInitFunc) e_text_init,
+ NULL, /* reserved_1 */
+ NULL, /* reserved_2 */
+ (GtkClassInitFunc) NULL
+ };
+
+ text_type = gtk_type_unique (gnome_canvas_item_get_type (), &text_info);
+ }
+
+ return text_type;
+}
+
+/* Class initialization function for the text item */
+static void
+e_text_class_init (ETextClass *class)
+{
+ GtkObjectClass *object_class;
+ GnomeCanvasItemClass *item_class;
+
+ object_class = (GtkObjectClass *) class;
+ item_class = (GnomeCanvasItemClass *) class;
+
+ parent_class = gtk_type_class (gnome_canvas_item_get_type ());
+
+ gtk_object_add_arg_type ("EText::text",
+ GTK_TYPE_STRING, GTK_ARG_READWRITE, ARG_TEXT);
+ gtk_object_add_arg_type ("EText::x",
+ GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X);
+ gtk_object_add_arg_type ("EText::y",
+ GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y);
+ gtk_object_add_arg_type ("EText::font",
+ GTK_TYPE_STRING, GTK_ARG_WRITABLE, ARG_FONT);
+ gtk_object_add_arg_type ("EText::fontset",
+ GTK_TYPE_STRING, GTK_ARG_WRITABLE, ARG_FONTSET);
+ gtk_object_add_arg_type ("EText::font_gdk",
+ GTK_TYPE_GDK_FONT, GTK_ARG_READWRITE, ARG_FONT_GDK);
+ gtk_object_add_arg_type ("EText::anchor",
+ GTK_TYPE_ANCHOR_TYPE, GTK_ARG_READWRITE, ARG_ANCHOR);
+ gtk_object_add_arg_type ("EText::justification",
+ GTK_TYPE_JUSTIFICATION, GTK_ARG_READWRITE, ARG_JUSTIFICATION);
+ gtk_object_add_arg_type ("EText::clip_width",
+ GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_CLIP_WIDTH);
+ gtk_object_add_arg_type ("EText::clip_height",
+ GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_CLIP_HEIGHT);
+ gtk_object_add_arg_type ("EText::clip",
+ GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_CLIP);
+ gtk_object_add_arg_type ("EText::x_offset",
+ GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X_OFFSET);
+ gtk_object_add_arg_type ("EText::y_offset",
+ GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y_OFFSET);
+ gtk_object_add_arg_type ("EText::fill_color",
+ GTK_TYPE_STRING, GTK_ARG_WRITABLE, ARG_FILL_COLOR);
+ gtk_object_add_arg_type ("EText::fill_color_gdk",
+ GTK_TYPE_GDK_COLOR, GTK_ARG_READWRITE, ARG_FILL_COLOR_GDK);
+ gtk_object_add_arg_type ("EText::fill_color_rgba",
+ GTK_TYPE_UINT, GTK_ARG_READWRITE, ARG_FILL_COLOR_RGBA);
+ gtk_object_add_arg_type ("EText::fill_stipple",
+ GTK_TYPE_GDK_WINDOW, GTK_ARG_READWRITE, ARG_FILL_STIPPLE);
+ gtk_object_add_arg_type ("EText::text_width",
+ GTK_TYPE_DOUBLE, GTK_ARG_READABLE, ARG_TEXT_WIDTH);
+ gtk_object_add_arg_type ("EText::text_height",
+ GTK_TYPE_DOUBLE, GTK_ARG_READABLE, ARG_TEXT_HEIGHT);
+ gtk_object_add_arg_type ("EText::use_ellipsis",
+ GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_USE_ELLIPSIS);
+ gtk_object_add_arg_type ("EText::ellipsis",
+ GTK_TYPE_STRING, GTK_ARG_READWRITE, ARG_ELLIPSIS);
+
+ object_class->destroy = e_text_destroy;
+ object_class->set_arg = e_text_set_arg;
+ object_class->get_arg = e_text_get_arg;
+
+ item_class->update = e_text_update;
+ item_class->realize = e_text_realize;
+ item_class->unrealize = e_text_unrealize;
+ item_class->draw = e_text_draw;
+ item_class->point = e_text_point;
+ item_class->bounds = e_text_bounds;
+ item_class->render = e_text_render;
+}
+
+/* Object initialization function for the text item */
+static void
+e_text_init (EText *text)
+{
+ text->x = 0.0;
+ text->y = 0.0;
+ text->anchor = GTK_ANCHOR_CENTER;
+ text->justification = GTK_JUSTIFY_LEFT;
+ text->clip_width = 0.0;
+ text->clip_height = 0.0;
+ text->xofs = 0.0;
+ text->yofs = 0.0;
+ text->ellipsis = NULL;
+ text->use_ellipsis = FALSE;
+ text->ellipsis_width = 0;
+}
+
+/* Destroy handler for the text item */
+static void
+e_text_destroy (GtkObject *object)
+{
+ EText *text;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GNOME_IS_CANVAS_TEXT (object));
+
+ text = E_TEXT (object);
+
+ if (text->text)
+ g_free (text->text);
+
+ if (text->lines)
+ g_free (text->lines);
+
+ if (text->font)
+ gdk_font_unref (text->font);
+
+ if (text->suckfont)
+ e_suck_font_free (text->suckfont);
+
+ if (text->stipple)
+ gdk_bitmap_unref (text->stipple);
+
+ if (GTK_OBJECT_CLASS (parent_class)->destroy)
+ (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}
+
+static void
+get_bounds_item_relative (EText *text, double *px1, double *py1, double *px2, double *py2)
+{
+ GnomeCanvasItem *item;
+ double x, y;
+ double clip_x, clip_y;
+
+ item = GNOME_CANVAS_ITEM (text);
+
+ x = text->x;
+ y = text->y;
+
+ clip_x = x;
+ clip_y = y;
+
+ /* Calculate text dimensions */
+
+ if (text->text && text->font)
+ text->height = (text->font->ascent + text->font->descent) * text->num_lines;
+ else
+ text->height = 0;
+
+ /* Anchor text */
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_SW:
+ break;
+
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_S:
+ x -= text->max_width / 2;
+ clip_x -= text->clip_width / 2;
+ break;
+
+ case GTK_ANCHOR_NE:
+ case GTK_ANCHOR_E:
+ case GTK_ANCHOR_SE:
+ x -= text->max_width;
+ clip_x -= text->clip_width;
+ break;
+ }
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_NE:
+ break;
+
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_E:
+ y -= text->height / 2;
+ clip_y -= text->clip_height / 2;
+ break;
+
+ case GTK_ANCHOR_SW:
+ case GTK_ANCHOR_S:
+ case GTK_ANCHOR_SE:
+ y -= text->height;
+ clip_y -= text->clip_height;
+ break;
+ }
+
+ /* Bounds */
+
+ if (text->clip) {
+ /* maybe do bbox intersection here? */
+ *px1 = clip_x;
+ *py1 = clip_y;
+ *px2 = clip_x + text->clip_width;
+ *py2 = clip_y + text->clip_height;
+ } else {
+ *px1 = x;
+ *py1 = y;
+ *px2 = x + text->max_width;
+ *py2 = y + text->height;
+ }
+}
+
+static void
+get_bounds (EText *text, double *px1, double *py1, double *px2, double *py2)
+{
+ GnomeCanvasItem *item;
+ double wx, wy;
+
+ item = GNOME_CANVAS_ITEM (text);
+
+ /* Get canvas pixel coordinates for text position */
+
+ wx = text->x;
+ wy = text->y;
+ gnome_canvas_item_i2w (item, &wx, &wy);
+ gnome_canvas_w2c (item->canvas, wx + text->xofs, wy + text->yofs, &text->cx, &text->cy);
+
+ /* Get canvas pixel coordinates for clip rectangle position */
+
+ gnome_canvas_w2c (item->canvas, wx, wy, &text->clip_cx, &text->clip_cy);
+ text->clip_cwidth = text->clip_width * item->canvas->pixels_per_unit;
+ text->clip_cheight = text->clip_height * item->canvas->pixels_per_unit;
+
+ /* Calculate text dimensions */
+
+ if (text->text && text->font)
+ text->height = (text->font->ascent + text->font->descent) * text->num_lines;
+ else
+ text->height = 0;
+
+ /* Anchor text */
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_SW:
+ break;
+
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_S:
+ text->cx -= text->max_width / 2;
+ text->clip_cx -= text->clip_cwidth / 2;
+ break;
+
+ case GTK_ANCHOR_NE:
+ case GTK_ANCHOR_E:
+ case GTK_ANCHOR_SE:
+ text->cx -= text->max_width;
+ text->clip_cx -= text->clip_cwidth;
+ break;
+ }
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_NE:
+ break;
+
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_E:
+ text->cy -= text->height / 2;
+ text->clip_cy -= text->clip_cheight / 2;
+ break;
+
+ case GTK_ANCHOR_SW:
+ case GTK_ANCHOR_S:
+ case GTK_ANCHOR_SE:
+ text->cy -= text->height;
+ text->clip_cy -= text->clip_cheight;
+ break;
+ }
+
+ /* Bounds */
+
+ if (text->clip) {
+ *px1 = text->clip_cx;
+ *py1 = text->clip_cy;
+ *px2 = text->clip_cx + text->clip_cwidth;
+ *py2 = text->clip_cy + text->clip_cheight;
+ } else {
+ *px1 = text->cx;
+ *py1 = text->cy;
+ *px2 = text->cx + text->max_width;
+ *py2 = text->cy + text->height;
+ }
+}
+
+/* Recalculates the bounding box of the text item. The bounding box is defined
+ * by the text's extents if the clip rectangle is disabled. If it is enabled,
+ * the bounding box is defined by the clip rectangle itself.
+ */
+static void
+recalc_bounds (EText *text)
+{
+ GnomeCanvasItem *item;
+
+ item = GNOME_CANVAS_ITEM (text);
+
+ get_bounds (text, &item->x1, &item->y1, &item->x2, &item->y2);
+
+ gnome_canvas_group_child_bounds (GNOME_CANVAS_GROUP (item->parent), item);
+}
+
+static void
+calc_ellipsis (EText *text)
+{
+ if (text->font)
+ text->ellipsis_width =
+ gdk_text_width (text->font,
+ text->ellipsis ? text->ellipsis : "...",
+ text->ellipsis ? strlen (text->ellipsis) : 3);
+}
+
+/* Calculates the line widths (in pixels) of the text's splitted lines */
+static void
+calc_line_widths (EText *text)
+{
+ struct line *lines;
+ int i;
+ int j;
+
+ lines = text->lines;
+ text->max_width = 0;
+
+ if (!lines)
+ return;
+
+ for (i = 0; i < text->num_lines; i++) {
+ if (lines->length != 0) {
+ if (text->font) {
+ lines->width = gdk_text_width (text->font,
+ lines->text, lines->length);
+ lines->ellipsis_length = 0;
+ } else {
+ lines->width = 0;
+ }
+
+ if (text->clip &&
+ text->use_ellipsis &&
+ lines->width > text->clip_width) {
+ if (text->font) {
+ lines->ellipsis_length = 0;
+ for (j = 0; j < lines->length; j++ ) {
+ if (gdk_text_width (text->font, lines->text, j) + text->ellipsis_width <= text->clip_width)
+ lines->ellipsis_length = j;
+ else
+ break;
+ }
+ }
+ else
+ lines->ellipsis_length = 0;
+ lines->width = gdk_text_width (text->font, lines->text, lines->ellipsis_length) +
+ text->ellipsis_width;
+ }
+ else
+ lines->ellipsis_length = lines->length;
+
+ if (lines->width > text->max_width)
+ text->max_width = lines->width;
+ }
+
+ lines++;
+ }
+}
+
+/* Splits the text of the text item into lines */
+static void
+split_into_lines (EText *text)
+{
+ char *p;
+ struct line *lines;
+ int len;
+
+ /* Free old array of lines */
+
+ if (text->lines)
+ g_free (text->lines);
+
+ text->lines = NULL;
+ text->num_lines = 0;
+
+ if (!text->text)
+ return;
+
+ /* First, count the number of lines */
+
+ for (p = text->text; *p; p++)
+ if (*p == '\n')
+ text->num_lines++;
+
+ text->num_lines++;
+
+ /* Allocate array of lines and calculate split positions */
+
+ text->lines = lines = g_new0 (struct line, text->num_lines);
+ len = 0;
+
+ for (p = text->text; *p; p++) {
+ if (*p == '\n') {
+ lines->length = len;
+ lines++;
+ len = 0;
+ } else if (len == 0) {
+ len++;
+ lines->text = p;
+ } else
+ len++;
+ }
+
+ lines->length = len;
+
+ calc_line_widths (text);
+}
+
+/* Convenience function to set the text's GC's foreground color */
+static void
+set_text_gc_foreground (EText *text)
+{
+ GdkColor c;
+
+ if (!text->gc)
+ return;
+
+ c.pixel = text->pixel;
+ gdk_gc_set_foreground (text->gc, &c);
+}
+
+/* Sets the stipple pattern for the text */
+static void
+set_stipple (EText *text, GdkBitmap *stipple, int reconfigure)
+{
+ if (text->stipple && !reconfigure)
+ gdk_bitmap_unref (text->stipple);
+
+ text->stipple = stipple;
+ if (stipple && !reconfigure)
+ gdk_bitmap_ref (stipple);
+
+ if (text->gc) {
+ if (stipple) {
+ gdk_gc_set_stipple (text->gc, stipple);
+ gdk_gc_set_fill (text->gc, GDK_STIPPLED);
+ } else
+ gdk_gc_set_fill (text->gc, GDK_SOLID);
+ }
+}
+
+/* Set_arg handler for the text item */
+static void
+e_text_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
+{
+ GnomeCanvasItem *item;
+ EText *text;
+ GdkColor color = { 0, 0, 0, 0, };
+ GdkColor *pcolor;
+ gboolean color_changed;
+ int have_pixel;
+
+ item = GNOME_CANVAS_ITEM (object);
+ text = E_TEXT (object);
+
+ color_changed = FALSE;
+ have_pixel = FALSE;
+
+ switch (arg_id) {
+ case ARG_TEXT:
+ if (text->text)
+ g_free (text->text);
+
+ text->text = g_strdup (GTK_VALUE_STRING (*arg));
+ split_into_lines (text);
+ recalc_bounds (text);
+ break;
+
+ case ARG_X:
+ text->x = GTK_VALUE_DOUBLE (*arg);
+ recalc_bounds (text);
+ break;
+
+ case ARG_Y:
+ text->y = GTK_VALUE_DOUBLE (*arg);
+ recalc_bounds (text);
+ break;
+
+ case ARG_FONT:
+ if (text->font)
+ gdk_font_unref (text->font);
+
+ text->font = gdk_font_load (GTK_VALUE_STRING (*arg));
+
+ if (item->canvas->aa) {
+ if (text->suckfont)
+ e_suck_font_free (text->suckfont);
+
+ text->suckfont = e_suck_font (text->font);
+ }
+
+ calc_ellipsis (text);
+ calc_line_widths (text);
+ recalc_bounds (text);
+ break;
+
+ case ARG_FONTSET:
+ if (text->font)
+ gdk_font_unref (text->font);
+
+ text->font = gdk_fontset_load (GTK_VALUE_STRING (*arg));
+
+ if (item->canvas->aa) {
+ if (text->suckfont)
+ e_suck_font_free (text->suckfont);
+
+ text->suckfont = e_suck_font (text->font);
+ }
+
+ calc_ellipsis (text);
+ calc_line_widths (text);
+ recalc_bounds (text);
+ break;
+
+ case ARG_FONT_GDK:
+ if (text->font)
+ gdk_font_unref (text->font);
+
+ text->font = GTK_VALUE_BOXED (*arg);
+ gdk_font_ref (text->font);
+
+ if (item->canvas->aa) {
+ if (text->suckfont)
+ e_suck_font_free (text->suckfont);
+
+ text->suckfont = e_suck_font (text->font);
+ }
+ calc_ellipsis (text);
+ calc_line_widths (text);
+ recalc_bounds (text);
+ break;
+
+ case ARG_ANCHOR:
+ text->anchor = GTK_VALUE_ENUM (*arg);
+ recalc_bounds (text);
+ break;
+
+ case ARG_JUSTIFICATION:
+ text->justification = GTK_VALUE_ENUM (*arg);
+ break;
+
+ case ARG_CLIP_WIDTH:
+ text->clip_width = fabs (GTK_VALUE_DOUBLE (*arg));
+ calc_ellipsis (text);
+ calc_line_widths (text);
+ recalc_bounds (text);
+ break;
+
+ case ARG_CLIP_HEIGHT:
+ text->clip_height = fabs (GTK_VALUE_DOUBLE (*arg));
+ recalc_bounds (text);
+ break;
+
+ case ARG_CLIP:
+ text->clip = GTK_VALUE_BOOL (*arg);
+ calc_ellipsis (text);
+ calc_line_widths (text);
+ recalc_bounds (text);
+ break;
+
+ case ARG_X_OFFSET:
+ text->xofs = GTK_VALUE_DOUBLE (*arg);
+ recalc_bounds (text);
+ break;
+
+ case ARG_Y_OFFSET:
+ text->yofs = GTK_VALUE_DOUBLE (*arg);
+ recalc_bounds (text);
+ break;
+
+ case ARG_FILL_COLOR:
+ if (GTK_VALUE_STRING (*arg))
+ gdk_color_parse (GTK_VALUE_STRING (*arg), &color);
+
+ text->rgba = ((color.red & 0xff00) << 16 |
+ (color.green & 0xff00) << 8 |
+ (color.blue & 0xff00) |
+ 0xff);
+ color_changed = TRUE;
+ break;
+
+ case ARG_FILL_COLOR_GDK:
+ pcolor = GTK_VALUE_BOXED (*arg);
+ if (pcolor) {
+ color = *pcolor;
+ gdk_color_context_query_color (item->canvas->cc, &color);
+ have_pixel = TRUE;
+ }
+
+ text->rgba = ((color.red & 0xff00) << 16 |
+ (color.green & 0xff00) << 8 |
+ (color.blue & 0xff00) |
+ 0xff);
+ color_changed = TRUE;
+ break;
+
+ case ARG_FILL_COLOR_RGBA:
+ text->rgba = GTK_VALUE_UINT (*arg);
+ color_changed = TRUE;
+ break;
+
+ case ARG_FILL_STIPPLE:
+ set_stipple (text, GTK_VALUE_BOXED (*arg), FALSE);
+ break;
+
+ case ARG_USE_ELLIPSIS:
+ text->use_ellipsis = GTK_VALUE_BOOL (*arg);
+ calc_line_widths (text);
+ recalc_bounds (text);
+ break;
+
+ case ARG_ELLIPSIS:
+ if (text->ellipsis)
+ g_free (text->ellipsis);
+
+ text->ellipsis = g_strdup (GTK_VALUE_STRING (*arg));
+ calc_ellipsis (text);
+ calc_line_widths (text);
+ recalc_bounds (text);
+ break;
+
+ default:
+ break;
+ }
+
+ if (color_changed) {
+ if (have_pixel)
+ text->pixel = color.pixel;
+ else
+ text->pixel = gnome_canvas_get_color_pixel (item->canvas, text->rgba);
+
+ if (!item->canvas->aa)
+ set_text_gc_foreground (text);
+
+ gnome_canvas_item_request_update (item);
+ }
+}
+
+/* Get_arg handler for the text item */
+static void
+e_text_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
+{
+ EText *text;
+ GdkColor *color;
+
+ text = E_TEXT (object);
+
+ switch (arg_id) {
+ case ARG_TEXT:
+ GTK_VALUE_STRING (*arg) = g_strdup (text->text);
+ break;
+
+ case ARG_X:
+ GTK_VALUE_DOUBLE (*arg) = text->x;
+ break;
+
+ case ARG_Y:
+ GTK_VALUE_DOUBLE (*arg) = text->y;
+ break;
+
+ case ARG_FONT_GDK:
+ GTK_VALUE_BOXED (*arg) = text->font;
+ break;
+
+ case ARG_ANCHOR:
+ GTK_VALUE_ENUM (*arg) = text->anchor;
+ break;
+
+ case ARG_JUSTIFICATION:
+ GTK_VALUE_ENUM (*arg) = text->justification;
+ break;
+
+ case ARG_CLIP_WIDTH:
+ GTK_VALUE_DOUBLE (*arg) = text->clip_width;
+ break;
+
+ case ARG_CLIP_HEIGHT:
+ GTK_VALUE_DOUBLE (*arg) = text->clip_height;
+ break;
+
+ case ARG_CLIP:
+ GTK_VALUE_BOOL (*arg) = text->clip;
+ break;
+
+ case ARG_X_OFFSET:
+ GTK_VALUE_DOUBLE (*arg) = text->xofs;
+ break;
+
+ case ARG_Y_OFFSET:
+ GTK_VALUE_DOUBLE (*arg) = text->yofs;
+ break;
+
+ case ARG_FILL_COLOR_GDK:
+ color = g_new (GdkColor, 1);
+ color->pixel = text->pixel;
+ gdk_color_context_query_color (text->item.canvas->cc, color);
+ GTK_VALUE_BOXED (*arg) = color;
+ break;
+
+ case ARG_FILL_COLOR_RGBA:
+ GTK_VALUE_UINT (*arg) = text->rgba;
+ break;
+
+ case ARG_FILL_STIPPLE:
+ GTK_VALUE_BOXED (*arg) = text->stipple;
+ break;
+
+ case ARG_TEXT_WIDTH:
+ GTK_VALUE_DOUBLE (*arg) = text->max_width / text->item.canvas->pixels_per_unit;
+ break;
+
+ case ARG_TEXT_HEIGHT:
+ GTK_VALUE_DOUBLE (*arg) = text->height / text->item.canvas->pixels_per_unit;
+ break;
+
+ case ARG_USE_ELLIPSIS:
+ GTK_VALUE_BOOL (*arg) = text->use_ellipsis;
+ break;
+
+ case ARG_ELLIPSIS:
+ GTK_VALUE_STRING (*arg) = g_strdup (text->ellipsis);
+ break;
+
+ default:
+ arg->type = GTK_TYPE_INVALID;
+ break;
+ }
+}
+
+/* Update handler for the text item */
+static void
+e_text_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
+{
+ EText *text;
+ double x1, y1, x2, y2;
+ ArtDRect i_bbox, c_bbox;
+ int i;
+
+ text = E_TEXT (item);
+
+ if (parent_class->update)
+ (* parent_class->update) (item, affine, clip_path, flags);
+
+ if (!item->canvas->aa) {
+ set_text_gc_foreground (text);
+ set_stipple (text, text->stipple, TRUE);
+ get_bounds (text, &x1, &y1, &x2, &y2);
+
+ gnome_canvas_update_bbox (item, x1, y1, x2, y2);
+ } else {
+ /* aa rendering */
+ for (i = 0; i < 6; i++)
+ text->affine[i] = affine[i];
+ get_bounds_item_relative (text, &i_bbox.x0, &i_bbox.y0, &i_bbox.x1, &i_bbox.y1);
+ art_drect_affine_transform (&c_bbox, &i_bbox, affine);
+ gnome_canvas_update_bbox (item, c_bbox.x0, c_bbox.y0, c_bbox.x1, c_bbox.y1);
+
+ }
+}
+
+/* Realize handler for the text item */
+static void
+e_text_realize (GnomeCanvasItem *item)
+{
+ EText *text;
+
+ text = E_TEXT (item);
+
+ if (parent_class->realize)
+ (* parent_class->realize) (item);
+
+ text->gc = gdk_gc_new (item->canvas->layout.bin_window);
+}
+
+/* Unrealize handler for the text item */
+static void
+e_text_unrealize (GnomeCanvasItem *item)
+{
+ EText *text;
+
+ text = E_TEXT (item);
+
+ gdk_gc_unref (text->gc);
+ text->gc = NULL;
+
+ if (parent_class->unrealize)
+ (* parent_class->unrealize) (item);
+}
+
+/* Calculates the x position of the specified line of text, based on the text's justification */
+static double
+get_line_xpos_item_relative (EText *text, struct line *line)
+{
+ double x;
+
+ x = text->x;
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_SW:
+ break;
+
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_S:
+ x -= text->max_width / 2;
+ break;
+
+ case GTK_ANCHOR_NE:
+ case GTK_ANCHOR_E:
+ case GTK_ANCHOR_SE:
+ x -= text->max_width;
+ break;
+ }
+
+ switch (text->justification) {
+ case GTK_JUSTIFY_RIGHT:
+ x += text->max_width - line->width;
+ break;
+
+ case GTK_JUSTIFY_CENTER:
+ x += (text->max_width - line->width) * 0.5;
+ break;
+
+ default:
+ /* For GTK_JUSTIFY_LEFT, we don't have to do anything. We do not support
+ * GTK_JUSTIFY_FILL, yet.
+ */
+ break;
+ }
+
+ return x;
+}
+
+/* Calculates the y position of the first line of text. */
+static double
+get_line_ypos_item_relative (EText *text)
+{
+ double y;
+
+ y = text->y;
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_NE:
+ break;
+
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_E:
+ y -= text->height / 2;
+ break;
+
+ case GTK_ANCHOR_SW:
+ case GTK_ANCHOR_S:
+ case GTK_ANCHOR_SE:
+ y -= text->height;
+ break;
+ }
+
+ return y;
+}
+
+/* Calculates the x position of the specified line of text, based on the text's justification */
+static int
+get_line_xpos (EText *text, struct line *line)
+{
+ int x;
+
+ x = text->cx;
+
+ switch (text->justification) {
+ case GTK_JUSTIFY_RIGHT:
+ x += text->max_width - line->width;
+ break;
+
+ case GTK_JUSTIFY_CENTER:
+ x += (text->max_width - line->width) / 2;
+ break;
+
+ default:
+ /* For GTK_JUSTIFY_LEFT, we don't have to do anything. We do not support
+ * GTK_JUSTIFY_FILL, yet.
+ */
+ break;
+ }
+
+ return x;
+}
+
+/* Draw handler for the text item */
+static void
+e_text_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
+ int x, int y, int width, int height)
+{
+ EText *text;
+ GdkRectangle rect;
+ struct line *lines;
+ int i;
+ int xpos, ypos;
+
+ text = E_TEXT (item);
+
+ if (!text->text || !text->font)
+ return;
+
+ if (text->clip) {
+ rect.x = text->clip_cx - x;
+ rect.y = text->clip_cy - y;
+ rect.width = text->clip_cwidth;
+ rect.height = text->clip_cheight;
+
+ gdk_gc_set_clip_rectangle (text->gc, &rect);
+ }
+ lines = text->lines;
+ ypos = text->cy + text->font->ascent;
+
+ if (text->stipple)
+ gnome_canvas_set_stipple_origin (item->canvas, text->gc);
+
+ for (i = 0; i < text->num_lines; i++) {
+ if (lines->length != 0) {
+ xpos = get_line_xpos (text, lines);
+ if ( text->clip && text->use_ellipsis && lines->ellipsis_length < lines->length) {
+ gdk_draw_text (drawable,
+ text->font,
+ text->gc,
+ xpos - x,
+ ypos - y,
+ lines->text,
+ lines->ellipsis_length);
+ gdk_draw_text (drawable,
+ text->font,
+ text->gc,
+ xpos - x +
+ lines->width - text->ellipsis_width,
+ ypos - y,
+ text->ellipsis ? text->ellipsis : "...",
+ text->ellipsis ? strlen (text->ellipsis) : 3);
+ } else
+
+ gdk_draw_text (drawable,
+ text->font,
+ text->gc,
+ xpos - x,
+ ypos - y,
+ lines->text,
+ lines->length);
+ }
+
+ ypos += text->font->ascent + text->font->descent;
+ lines++;
+ }
+
+ if (text->clip)
+ gdk_gc_set_clip_rectangle (text->gc, NULL);
+}
+
+/* Render handler for the text item */
+static void
+e_text_render (GnomeCanvasItem *item, GnomeCanvasBuf *buf)
+{
+ EText *text;
+ guint32 fg_color;
+ double xpos, ypos;
+ struct line *lines;
+ int i, j;
+ double affine[6];
+ ETextSuckFont *suckfont;
+ int dx, dy;
+ ArtPoint start_i, start_c;
+
+ text = E_TEXT (item);
+
+ if (!text->text || !text->font || !text->suckfont)
+ return;
+
+ suckfont = text->suckfont;
+
+ fg_color = text->rgba;
+
+ gnome_canvas_buf_ensure_buf (buf);
+
+ lines = text->lines;
+ start_i.y = get_line_ypos_item_relative (text);
+
+ art_affine_scale (affine, item->canvas->pixels_per_unit, item->canvas->pixels_per_unit);
+ for (i = 0; i < 6; i++)
+ affine[i] = text->affine[i];
+
+ for (i = 0; i < text->num_lines; i++) {
+ if (lines->length != 0) {
+ start_i.x = get_line_xpos_item_relative (text, lines);
+ art_affine_point (&start_c, &start_i, text->affine);
+ xpos = start_c.x;
+ ypos = start_c.y;
+
+ for (j = 0; j < lines->length; j++) {
+ ETextSuckChar *ch;
+
+ ch = &suckfont->chars[(unsigned char)((lines->text)[j])];
+
+ affine[4] = xpos;
+ affine[5] = ypos;
+ art_rgb_bitmap_affine (
+ buf->buf,
+ buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1,
+ buf->buf_rowstride,
+ suckfont->bitmap + (ch->bitmap_offset >> 3),
+ ch->width,
+ suckfont->bitmap_height,
+ suckfont->bitmap_width >> 3,
+ fg_color,
+ affine,
+ ART_FILTER_NEAREST, NULL);
+
+ dx = ch->left_sb + ch->width + ch->right_sb;
+ xpos += dx * affine[0];
+ ypos += dx * affine[1];
+ }
+ }
+
+ dy = text->font->ascent + text->font->descent;
+ start_i.y += dy;
+ lines++;
+ }
+
+ buf->is_bg = 0;
+}
+
+/* Point handler for the text item */
+static double
+e_text_point (GnomeCanvasItem *item, double x, double y,
+ int cx, int cy, GnomeCanvasItem **actual_item)
+{
+ EText *text;
+ int i;
+ struct line *lines;
+ int x1, y1, x2, y2;
+ int font_height;
+ int dx, dy;
+ double dist, best;
+
+ text = E_TEXT (item);
+
+ *actual_item = item;
+
+ /* The idea is to build bounding rectangles for each of the lines of
+ * text (clipped by the clipping rectangle, if it is activated) and see
+ * whether the point is inside any of these. If it is, we are done.
+ * Otherwise, calculate the distance to the nearest rectangle.
+ */
+
+ if (text->font)
+ font_height = text->font->ascent + text->font->descent;
+ else
+ font_height = 0;
+
+ best = 1.0e36;
+
+ lines = text->lines;
+
+ for (i = 0; i < text->num_lines; i++) {
+ /* Compute the coordinates of rectangle for the current line,
+ * clipping if appropriate.
+ */
+
+ x1 = get_line_xpos (text, lines);
+ y1 = text->cy + i * font_height;
+ x2 = x1 + lines->width;
+ y2 = y1 + font_height;
+
+ if (text->clip) {
+ if (x1 < text->clip_cx)
+ x1 = text->clip_cx;
+
+ if (y1 < text->clip_cy)
+ y1 = text->clip_cy;
+
+ if (x2 > (text->clip_cx + text->clip_width))
+ x2 = text->clip_cx + text->clip_width;
+
+ if (y2 > (text->clip_cy + text->clip_height))
+ y2 = text->clip_cy + text->clip_height;
+
+ if ((x1 >= x2) || (y1 >= y2))
+ continue;
+ }
+
+ /* Calculate distance from point to rectangle */
+
+ if (cx < x1)
+ dx = x1 - cx;
+ else if (cx >= x2)
+ dx = cx - x2 + 1;
+ else
+ dx = 0;
+
+ if (cy < y1)
+ dy = y1 - cy;
+ else if (cy >= y2)
+ dy = cy - y2 + 1;
+ else
+ dy = 0;
+
+ if ((dx == 0) && (dy == 0))
+ return 0.0;
+
+ dist = sqrt (dx * dx + dy * dy);
+ if (dist < best)
+ best = dist;
+
+ /* Next! */
+
+ lines++;
+ }
+
+ return best / item->canvas->pixels_per_unit;
+}
+
+/* Bounds handler for the text item */
+static void
+e_text_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
+{
+ EText *text;
+ double width, height;
+
+ text = E_TEXT (item);
+
+ *x1 = text->x;
+ *y1 = text->y;
+
+ if (text->clip) {
+ width = text->clip_width;
+ height = text->clip_height;
+ } else {
+ width = text->max_width / item->canvas->pixels_per_unit;
+ height = text->height / item->canvas->pixels_per_unit;
+ }
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_SW:
+ break;
+
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_S:
+ *x1 -= width / 2.0;
+ break;
+
+ case GTK_ANCHOR_NE:
+ case GTK_ANCHOR_E:
+ case GTK_ANCHOR_SE:
+ *x1 -= width;
+ break;
+ }
+
+ switch (text->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_NE:
+ break;
+
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_E:
+ *y1 -= height / 2.0;
+ break;
+
+ case GTK_ANCHOR_SW:
+ case GTK_ANCHOR_S:
+ case GTK_ANCHOR_SE:
+ *y1 -= height;
+ break;
+ }
+
+ *x2 = *x1 + width;
+ *y2 = *y1 + height;
+}
+
+
+
+/* Routines for sucking fonts from the X server */
+
+static ETextSuckFont *
+e_suck_font (GdkFont *font)
+{
+ ETextSuckFont *suckfont;
+ int i;
+ int x, y;
+ char text[1];
+ int lbearing, rbearing, ch_width, ascent, descent;
+ GdkPixmap *pixmap;
+ GdkColor black, white;
+ GdkImage *image;
+ GdkGC *gc;
+ guchar *bitmap, *line;
+ int width, height;
+ int black_pixel, pixel;
+
+ if (!font)
+ return NULL;
+
+ suckfont = g_new (ETextSuckFont, 1);
+
+ height = font->ascent + font->descent;
+ x = 0;
+ for (i = 0; i < 256; i++) {
+ text[0] = i;
+ gdk_text_extents (font, text, 1,
+ &lbearing, &rbearing, &ch_width, &ascent, &descent);
+ suckfont->chars[i].left_sb = lbearing;
+ suckfont->chars[i].right_sb = ch_width - rbearing;
+ suckfont->chars[i].width = rbearing - lbearing;
+ suckfont->chars[i].ascent = ascent;
+ suckfont->chars[i].descent = descent;
+ suckfont->chars[i].bitmap_offset = x;
+ x += (ch_width + 31) & -32;
+ }
+
+ width = x;
+
+ suckfont->bitmap_width = width;
+ suckfont->bitmap_height = height;
+ suckfont->ascent = font->ascent;
+
+ pixmap = gdk_pixmap_new (NULL, suckfont->bitmap_width,
+ suckfont->bitmap_height, 1);
+ gc = gdk_gc_new (pixmap);
+ gdk_gc_set_font (gc, font);
+
+ black_pixel = BlackPixel (gdk_display, DefaultScreen (gdk_display));
+ black.pixel = black_pixel;
+ white.pixel = WhitePixel (gdk_display, DefaultScreen (gdk_display));
+ gdk_gc_set_foreground (gc, &white);
+ gdk_draw_rectangle (pixmap, gc, 1, 0, 0, width, height);
+
+ gdk_gc_set_foreground (gc, &black);
+ for (i = 0; i < 256; i++) {
+ text[0] = i;
+ gdk_draw_text (pixmap, font, gc,
+ suckfont->chars[i].bitmap_offset - suckfont->chars[i].left_sb,
+ font->ascent,
+ text, 1);
+ }
+
+ /* The handling of the image leaves me with distinct unease. But this
+ * is more or less copied out of gimp/app/text_tool.c, so it _ought_ to
+ * work. -RLL
+ */
+
+ image = gdk_image_get (pixmap, 0, 0, width, height);
+ suckfont->bitmap = g_malloc0 ((width >> 3) * height);
+
+ line = suckfont->bitmap;
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width; x++) {
+ pixel = gdk_image_get_pixel (image, x, y);
+ if (pixel == black_pixel)
+ line[x >> 3] |= 128 >> (x & 7);
+ }
+ line += width >> 3;
+ }
+
+ gdk_image_destroy (image);
+
+ /* free the pixmap */
+ gdk_pixmap_unref (pixmap);
+
+ /* free the gc */
+ gdk_gc_destroy (gc);
+
+ return suckfont;
+}
+
+static void
+e_suck_font_free (ETextSuckFont *suckfont)
+{
+ g_free (suckfont->bitmap);
+ g_free (suckfont);
+}