; c2 = sel_start_col; } new_rgn = XCreateRegion(); if (r1 == r2) { appendToRegion(new_rgn, r1, c1, r2, c2); } else { appendToRegion(new_rgn, r1, c1, r1, columns - 1); appendToRegion(new_rgn, r1 + 1, 0, r2 - 1, columns - 1); appendToRegion(new_rgn, r2, 0, r2, c2); } if (sel_rgn == None) sel_rgn = XCreateRegion(); chg_rgn = XCreateRegion(); XXorRegion(sel_rgn, new_rgn, chg_rgn); XDestroyRegion(sel_rgn); sel_rgn = None; /* * redraw any selected text */ clp_rgn = XCreateRegion(); XIntersectRegion(new_rgn, chg_rgn, clp_rgn); XSetRegion(display, gc, clp_rgn); XSetForeground(display, gc, selectBG); XFillRectangle(display, win, gc, 0, 0, (unsigned int)width, (unsigned int)height); XSetForeground(display, gc, selectFG); drawText(); XDestroyRegion(clp_rgn); /* * redraw any normal text */ clp_rgn = XCreateRegion(); XSubtractRegion(chg_rgn, new_rgn, clp_rgn); XSetRegion(display, gc, clp_rgn); XSetForeground(display, gc, normalBG); XFillRectangle(display, win, gc, 0, 0, (unsigned int)width, (unsigned int)height); XSetForeground(display, gc, normalFG); drawText(); XDestroyRegion(clp_rgn); XDestroyRegion(chg_rgn); sel_rgn = new_rgn; } /*********************************************************************** * * FUNCTION: * copySelect * * INPUTS: * none * * OUTPUTS: * none * * RETURNS: * none * * EXTERNALLY READ: * logstart - (static int) current starting index in display area * sel_start_row - (static int) row of first selected character * sel_start_col - (static int) column of first selected character * sel_cur_row - (static int) row currently under the cursor * sel_cur_col - (static int) column currently under the cursor * * EXTERNALLY MODIFIED: * sel_buf - (static char *) text buffer for selection * * DESCRIPTION: * Copy the text indicated by the selected area of the screen * to the select text buffer. */ static void copySelect(void) { int r1, c1; /* first cell */ int r2, c2; /* last cell */ char *msg; /* text pointer */ unsigned int len; /* length of text string */ char *ptr; /* pointer into selection buffer */ if ((sel_cur_row > sel_start_row) || ((sel_cur_row == sel_start_row) && (sel_cur_col >= sel_start_col))) { r1 = sel_start_row; c1 = sel_start_col; r2 = sel_cur_row; c2 = sel_cur_col; } else { r1 = sel_cur_row; c1 = sel_cur_col; r2 = sel_start_row; c2 = sel_start_col; } ptr = sel_buf; /* * get the first line */ msg = getLogMessage(logstart + r1); len = strlen(msg); if (c1 > len) { msg = ""; len = 0; } else { msg += c1; len -= c1; if (r1 == r2) c2 -= c1; } /* * copy each line in turn and get the last line */ while (++r1 <= r2) { strncpy(ptr, msg, len); ptr += len; msg = getLogMessage(logstart + r1); len = strlen(msg); } /* * copy out the last line */ if (c2 + 1 < len) { len = c2 + 1; } strncpy(ptr, msg, len); ptr += len; /* * terminate the buffer */ *ptr = '\0'; /* * cannot set a property to an empty string */ if (*sel_buf == '\0') { strcpy(sel_buf, "\n"); } } /*********************************************************************** * * FUNCTION: * appendToRegion * * INPUTS: * rgn - (Region) existing and modified region * r1 - (int) row number of upper left corner * c1 - (int) column number of upper left corner * r2 - (int) row number of lower right corner * c2 - (int) column number of lower right corner * * OUTPUTS: * none * * RETURNS: * none * * EXTERNALLY READ: * height - (static Dimension) current height of message area * width - (static Dimension) current width of message area * cheight - (static int) character height in pixels * cwidth - (static int) character width in pixels * cell_x - (static int) x offset of first cell in pixels * cell_y - (static int) y offset of first cell in pixels * * EXTERNALLY MODIFIED: * none * * DESCRIPTION: * Append a rectangle defined by row and column values to the * select region. */ static void appendToRegion(Region rgn, int r1, int c1, int r2, int c2) { XRectangle r; if ((c2 >= c1) && (r2 >= r1)) { r.x = cwidth * c1 + cell_x; r.y = cheight * r1 + cell_y; r.width = cwidth * (1 + c2 - c1); r.height = cheight * (1 + r2 - r1); XUnionRectWithRegion(&r, rgn, rgn); } }