/* File: search.c Author: Neil Cafferkey Copyright (C) 2000 Neil Cafferkey 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "viewer.h" #include #include #include #include #include "search_protos.h" #include "general_protos.h" #include "article_protos.h" #include "index_protos.h" #include "paedia_protos.h" #include #include #include #include #define SUBJECT_LINE_COUNT 4 #define MIN_ARTICLE_LINE_COUNT 4 #define DEFAULT_SEARCH_WIDTH 250 #define DEFAULT_SEARCH_HEIGHT 250 enum {KEYWORD_BOX_ID=1,SEARCH_BUTTON_ID,SUBJECT_VIEW_ID,ARTICLE_VIEW_ID}; const TEXT *keyword_box_label="Search Words"; const TEXT *search_button_label="Search"; const TEXT *subject_view_label="Subjects"; const TEXT *article_view_label="Articles"; /* Prototypes */ static BOOL OpenSearchGadgets(Search search); static VOID CloseSearchGadgets(Search search); /* Function: CreateSearch * ====================== * Creates a Search. */ Search CreateSearch(struct MsgPort *msg_port,Paedia paedia, struct MinList *object_list,UWORD left,UWORD top) { Search search; BOOL success=TRUE; struct Screen *screen=NULL; struct IntuiText i_text; struct Window *window; if(search=AllocMem(sizeof(Search_imp),MEMF_CLEAR)) { search->node.ln_Type=NT_SEARCH; search->paedia=paedia; search->object_list=object_list; search->msg_port=msg_port; /* Allocate memory for search string */ if((search->keywords=AllocMem(64+1,MEMF_ANY))!=NULL) { *search->keywords='\0'; } else { ReportError(NULL,ERROR_REPORT_MEM,NULL,0); success=FALSE; } /* Open the search window */ search->window=window=OpenWindowTags(NULL, WA_Left,left, WA_Top,top, WA_Width,DEFAULT_SEARCH_WIDTH, WA_Height,DEFAULT_SEARCH_HEIGHT, WA_Flags,WFLG_CLOSEGADGET|WFLG_DEPTHGADGET|WFLG_SIZEBBOTTOM| WFLG_SIZEGADGET|WFLG_ACTIVATE|WFLG_NEWLOOKMENUS|WFLG_DRAGBAR, WA_Title,"Index", WA_MinWidth,0, WA_MinHeight,0, WA_MaxWidth,-1, WA_MaxHeight,-1, TAG_END); /* Lock the screen so it can be examined during the life of this Search. */ search->screen=screen=LockPubScreen(NULL); if(window) { /* Set the window's message port and IDCMP flags */ window->UserPort=msg_port; ModifyIDCMP(window,IDCMP_CLOSEWINDOW|IDCMP_NEWSIZE| IDCMP_CHANGEWINDOW|STRINGIDCMP|BUTTONIDCMP|LISTVIEWIDCMP); /* Store Search's pointer in its window */ (Search)window->UserData=search; /* Calculate gadget positions and sizes */ search->font_height=screen->Font->ta_YSize; search->gadget_left=window->BorderLeft+INTERWIDTH; search->gadget_top=window->BorderTop+INTERHEIGHT +search->font_height+INTERHEIGHT; search->gadget_rel_width= -window->BorderRight-INTERWIDTH-search->gadget_left; i_text.ITextFont=screen->Font; i_text.IText=search_button_label; i_text.NextText=NULL; search->search_button_width=IntuiTextLength(&i_text)+12; search->search_button_rel_left=-window->BorderLeft -INTERWIDTH-search->search_button_width; search->keyword_box_rel_width= -window->BorderRight-2*INTERWIDTH -search->search_button_width-search->gadget_left; search->keyword_box_height=search->font_height+6; search->subject_view_top=search->gadget_top +search->keyword_box_height+search->font_height+2*INTERHEIGHT; search->subject_view_height=search->font_height*SUBJECT_LINE_COUNT +4; search->article_view_top=search->subject_view_top +search->subject_view_height+search->font_height+2*INTERHEIGHT; search->article_view_rel_height=-search->article_view_top -window->BorderBottom-INTERHEIGHT; /* Set minimum window dimensions */ i_text.IText=keyword_box_label; search->min_width=-search->search_button_rel_left +IntuiTextLength(&i_text)+2*INTERWIDTH+window->BorderLeft; search->min_height=search->article_view_top+search->font_height* MIN_ARTICLE_LINE_COUNT+4+INTERHEIGHT+window->BorderBottom; if(!WindowLimits(window,search->min_width,search->min_height,0,0)) ChangeWindowBox(window,window->LeftEdge,window->TopEdge, search->min_width,search->min_height); /* Create gadgets */ search->visual_info=GetVisualInfoA(screen,NULL); OpenSearchGadgets(search); } else { success=FALSE; } if(!success) { KillSearch(search); search=NULL; } } else ReportError(NULL,ERROR_REPORT_MEM,NULL,0); return search; } /* Function: OpenSearchGadgets * =========================== * Sets up a Search's gadgets. Returns a success flag. */ static BOOL OpenSearchGadgets(Search search) { BOOL success=TRUE; struct Screen *screen=search->screen; struct NewGadget new_gadget; struct Window *window=search->window; /* Recalculate variable gadget positions and sizes */ /* Create a gadtools context for this window */ search->context=CreateContext(&search->gadgets); /* Create the keyword box */ new_gadget.ng_LeftEdge=search->gadget_left; new_gadget.ng_TopEdge=search->gadget_top; new_gadget.ng_Width=window->Width+search->keyword_box_rel_width; new_gadget.ng_Height=search->keyword_box_height; new_gadget.ng_GadgetText=keyword_box_label; new_gadget.ng_TextAttr=screen->Font; new_gadget.ng_GadgetID=KEYWORD_BOX_ID; new_gadget.ng_Flags=PLACETEXT_ABOVE|NG_HIGHLABEL; new_gadget.ng_VisualInfo=search->visual_info; new_gadget.ng_UserData=0; search->keyword_box=CreateGadget(STRING_KIND,search->context, &new_gadget,GTST_String,search->keywords,TAG_END); /* Create the search button */ new_gadget.ng_LeftEdge=window->Width+search->search_button_rel_left; new_gadget.ng_TopEdge=search->gadget_top; new_gadget.ng_Width=search->search_button_width; new_gadget.ng_Height=search->keyword_box_height; new_gadget.ng_GadgetText=search_button_label; new_gadget.ng_TextAttr=screen->Font; new_gadget.ng_GadgetID=SEARCH_BUTTON_ID; new_gadget.ng_Flags=0; new_gadget.ng_VisualInfo=search->visual_info; new_gadget.ng_UserData=0; search->search_button=CreateGadget(BUTTON_KIND,search->keyword_box, &new_gadget,TAG_END); /* Create the subject listview */ new_gadget.ng_LeftEdge=search->gadget_left; new_gadget.ng_TopEdge=search->subject_view_top; new_gadget.ng_Width=window->Width+search->gadget_rel_width; new_gadget.ng_Height=search->subject_view_height; new_gadget.ng_GadgetText=subject_view_label; new_gadget.ng_TextAttr=screen->Font; new_gadget.ng_GadgetID=SUBJECT_VIEW_ID; new_gadget.ng_Flags=0; new_gadget.ng_VisualInfo=search->visual_info; new_gadget.ng_UserData=0; search->subject_view=CreateGadget(LISTVIEW_KIND,search->search_button, &new_gadget,GTLV_Labels,search->index_list,GTLV_Selected, search->selected_subject_no,GTLV_ShowSelected,NULL, GTLV_Top,search->top_subject_no,TAG_END); /* Create the article listview */ new_gadget.ng_LeftEdge=search->gadget_left; new_gadget.ng_TopEdge=search->article_view_top; new_gadget.ng_Width=window->Width+search->gadget_rel_width; new_gadget.ng_Height=window->Height+search->article_view_rel_height; new_gadget.ng_GadgetText=article_view_label; new_gadget.ng_TextAttr=screen->Font; new_gadget.ng_GadgetID=ARTICLE_VIEW_ID; new_gadget.ng_Flags=0; new_gadget.ng_VisualInfo=search->visual_info; new_gadget.ng_UserData=0; if(search->current_subject!=NULL) { search->article_view=CreateGadget(LISTVIEW_KIND,search->subject_view, &new_gadget,GTLV_Labels,&search->current_subject->ref_list, GTLV_Top,search->top_article_no,TAG_END); } else { search->article_view=CreateGadget(LISTVIEW_KIND,search->subject_view, &new_gadget,GTLV_Labels,NULL,TAG_END); } /* Add gadgets to window and make them visible */ if(search->gadgets!=NULL) { AddGList(window,search->gadgets,-1,-1,NULL); RefreshGList(search->gadgets,window,NULL,-1); GT_RefreshWindow(window,NULL); } else { success=FALSE; } if(!success) { KillSearch(search); search=NULL; } return success; } /* Function: CloseSearchGadgets * ============================ * Destroys a Search's gadgets. */ static VOID CloseSearchGadgets(Search search) { TEXT *keywords; /* Copy keyword string from gadget */ GT_GetGadgetAttrs(search->keyword_box,search->window,NULL,GTST_String, &keywords,TAG_END); if(search->keywords) strcpy(search->keywords,keywords); /* Store listview attributes */ GT_GetGadgetAttrs(search->subject_view,search->window,NULL,GTLV_Selected, &search->selected_subject_no,GTLV_Top,&search->top_subject_no, TAG_END); /*printf("search->selected_subject_no=%u\n",search->selected_subject_no);*/ GT_GetGadgetAttrs(search->article_view,search->window,NULL,GTLV_Top, &search->top_article_no,TAG_END); /* Remove and free gadgets */ RemoveGList(search->window,search->gadgets,-1); FreeGadgets(search->gadgets); /* Clear window */ SetRast(search->window->RPort,0); RefreshWindowFrame(search->window); return; } /* Function: HandleSearchInput * =========================== */ VOID HandleSearchInput(Search search,struct IntuiMessage *msg) { BOOL close=FALSE; ULONG article_no=0; struct IntuiMessage *mod_msg; struct Gadget *gadget=(struct Gadget *)msg->IAddress; TEXT *keywords; Article article; Reference ref; Sequence article_data; mod_msg=GT_FilterIMsg(msg); if(mod_msg!=NULL) { switch(mod_msg->Class) { case IDCMP_NEWSIZE: CloseSearchGadgets(search); OpenSearchGadgets(search); break; case IDCMP_CLOSEWINDOW: close=TRUE; break; case IDCMP_GADGETUP: switch(gadget->GadgetID) { case KEYWORD_BOX_ID: case SEARCH_BUTTON_ID: /* Copy keyword string from gadget */ GT_GetGadgetAttrs(search->keyword_box,search->window,NULL, GTST_String,&keywords,TAG_END); strcpy(search->keywords,keywords); /* Remove subject and article lists from their gadgets */ GT_SetGadgetAttrs(search->subject_view,search->window,NULL, GTLV_Labels,NULL,TAG_END); GT_SetGadgetAttrs(search->article_view,search->window,NULL, GTLV_Labels,NULL,TAG_END); /* Do a new index search */ if(search->index_list) KillIndexResults(search->index_list); SetWindowPointer(search->window,WA_BusyPointer,TRUE,TAG_END); search->index_list=FindIndexRecords(search->paedia->index, search->keywords); /* Display new subjects */ GT_SetGadgetAttrs(search->subject_view,search->window,NULL, GTLV_Labels,search->index_list,GTLV_Selected,0,TAG_END); SetWindowPointer(search->window,TAG_END); case SUBJECT_VIEW_ID: /* Get current subject number */ GT_GetGadgetAttrs(search->subject_view,search->window,NULL, GTLV_Selected,&search->selected_subject_no,TAG_END); if(search->selected_subject_no!=~0) { search->current_subject=(IndexRecord)GetMinListNode( (struct MinList *)search->index_list, search->selected_subject_no); /* Display new article titles */ GT_SetGadgetAttrs(search->article_view,search->window,NULL, GTLV_Labels,&search->current_subject->ref_list,TAG_END); } else { search->current_subject=NULL; } break; case ARTICLE_VIEW_ID: /* Display selected article */ ref=(Reference)GetMinListNode( (struct MinList *)&search->current_subject->ref_list, mod_msg->Code); article_data=GetPaediaItem(search->paedia,ref->link_no); article=CreateArticle(article_data,search->msg_port); if(article) AddTail((struct List *)search->object_list,&article->node); default: } case IDCMP_CHANGEWINDOW: if(!WindowLimits(search->window,search->min_width, search->min_height,0,0)) ChangeWindowBox(search->window,search->window->LeftEdge, search->window->TopEdge,search->min_width, search->min_height); break; default: } GT_PostFilterIMsg(mod_msg); } ReplyMsg((struct Message *)msg); if(close) { Remove(&search->node); KillSearch(search); } return; } /* Function: KillSearch * ==================== * Destroys a Search. */ VOID KillSearch(Search search) { if(search->index_list) KillIndexResults(search->index_list); if(search->window) { CloseSearchGadgets(search); Forbid(); StripWindowMessages(search->window); search->window->UserPort=NULL; ModifyIDCMP(search->window,0); Permit(); CloseWindow(search->window); UnlockPubScreen(NULL,search->screen); } FreeVisualInfo(search->visual_info); if(search->keywords!=NULL) FreeMem(search->keywords,64+1); /* Free search structure */ FreeMem(search,sizeof(Search_imp)); return; }