Add support for fetching more results.

browserevents.c

@@ -84,14 +84,7 @@ static void HandleEvent(int eventCode, WmTaskRec *taskRec) {
     case wInControl:
         switch (taskRec->wmTaskData4) {
         case searchButton:
-            DoSearch();
-            break;
-        
-        case forIIGSRadio:
-            gsDisksOnly = true;
-            break;
-        case forAnyAppleIIRadio:
-            gsDisksOnly = false;
+            DoSearch(false);
             break;
 
         case mountDiskButton:

browserwindow.c

@@ -23,11 +23,15 @@
 #include "browserwindow.h"
 #include "diskbrowser.h"
 #include "browserevents.h"
+#include "disksearch.h"
 
 /* Rectangles outlining the buttons in the style of "default" buttons */
 static Rect searchRect = {8, 305, 26, 414};
 static Rect mountRect = {150, 301, 168, 414};
 
+static char showMoreString[] = "\pShow More";
+static char mountDiskString[] = "\pMount Disk";
+
 /* Has the resource file been opened? (True while window is displayed.) */
 static Boolean resourceFileOpened;
 
@@ -48,6 +52,9 @@ static CtlRecHndl searchButtonHandle;
 /* Target control ID last time we checked */
 static unsigned long lastTargetCtlID = 0;
 
+/* Is "More Results" selected in the disk list? */
+static boolean moreResultsSelected = false;
+
 
 static void DrawContents(void);
 static void DrawButtonOutlines(boolean justChanged);
@@ -109,7 +116,17 @@ void ShowBrowserWindow(void) {
     
     wantToOpenWindow = 0;
     
+    moreResultsSelected = false;
+    
     InitEventState();
+    
+    diskList = malloc(DISK_LIST_MAX_LENGTH * sizeof(*diskList));
+    if (diskList == NULL) {
+        CloseWindow(window);
+        windowOpened = false;
+        window = NULL;
+        goto cleanup;
+    }
 
 cleanup:
     if (resourceFileOpened && !windowOpened) {
@@ -127,20 +144,16 @@ void CloseBrowserWindow(void) {
         CloseWindow(window);
         windowOpened = false;
         window = NULL;
-        
-        /* reset state */
-        gsDisksOnly = true;
     }
 
     if (resourceFileOpened) {
         CloseResourceFile(resourceFileID);
         resourceFileOpened = false;
     }
+    
+    free(diskList);
 
-    if (json) {
-        json_value_free(json);
-        json = NULL;
-    }
+    FreeJSON();
 }
 #pragma databank 0
 
@@ -202,7 +215,23 @@ void UpdateControlState(void) {
     }
 
     /* Only allow "Mount Disk" to be clicked if there is a disk selected */
-    if (NextMember2(0, (Handle)disksListHandle) != 0) {
+    int currentSelection = NextMember2(0, (Handle)disksListHandle);
+    if (currentSelection != 0) {
+        if (diskList[currentSelection-1].memPtr == moreResultsString) {
+            if (!moreResultsSelected) {
+                SetCtlMoreFlags(GetCtlMoreFlags(mountButtonHandle) & 0xFFFC, 
+                                mountButtonHandle);
+                SetCtlTitle(showMoreString, (Handle)mountButtonHandle);
+                moreResultsSelected = true;
+            }
+        } else {
+            if (moreResultsSelected) {
+                SetCtlMoreFlags(GetCtlMoreFlags(mountButtonHandle) & 0xFFFC, 
+                                mountButtonHandle);
+                SetCtlTitle(mountDiskString, (Handle)mountButtonHandle);
+                moreResultsSelected = false;
+            }
+        }
         HiliteControl(noHilite, mountButtonHandle);
     } else {
         HiliteControl(inactiveHilite, mountButtonHandle);

diskbrowser.c

@@ -27,24 +27,24 @@ GrafPortPtr window;
 /* Is the window open? */
 Boolean windowOpened;
 
-/* User preference: IIGS disks or all Apple II disks? */
-boolean gsDisksOnly = true;
-
 /* Disks list control */
 CtlRecHndl disksListHandle;
 
 /* List of disks, used for list control & mounting disks */
-struct diskListEntry diskList[DISK_LIST_LENGTH];
+struct diskListEntry *diskList;
 
 /* Do we want to open a window with disk contents? Counts down until ready. */
 int wantToOpenWindow = 0;
 
 /* JSON for current disk list (needs to be kept in memory while it's shown) */
-json_value *json = NULL;
+json_value *json[MAX_PAGES];
 
 /* User ID of this program */
 Word myUserID;
 
+/* String for "More Results" (used to identify that list entry) */
+char moreResultsString[] = "                               <More Results>";
+
 /***/
 
 static char menuTitle[] = "\pArchive.org Disk Browser\xC9";

diskbrowser.h

@@ -22,15 +22,9 @@ extern GrafPortPtr window;
 /* Is the window open? */
 extern Boolean windowOpened;
 
-/* User preference: IIGS disks or all Apple II disks? */
-extern boolean gsDisksOnly;
-
 /* Disks list control */
 extern CtlRecHndl disksListHandle;
 
-/* Length of disks list */
-#define DISK_LIST_LENGTH 30
-
 struct diskListEntry {
     char *memPtr;
     Byte memFlag;
@@ -38,14 +32,25 @@ struct diskListEntry {
     char *extPtr;
 };
 
+/* Maximum number of entries in list */
+#define DISK_LIST_MAX_LENGTH (int)(0xFFFF/sizeof(struct diskListEntry))
+
+/* How many results to fetch at a time */
+#define PAGE_SIZE 30
+
+#define MAX_PAGES ((DISK_LIST_MAX_LENGTH + PAGE_SIZE - 1) / PAGE_SIZE)
+
 /* List of disks, used for list control & mounting disks */
-extern struct diskListEntry diskList[DISK_LIST_LENGTH];
+extern struct diskListEntry *diskList;
+
+/* String for "More Results" (used to identify that list entry) */
+extern char moreResultsString[];
 
 /* Do we want to open a window with disk contents? Counts down until ready. */
 extern int wantToOpenWindow;
 
 /* JSON for current disk list (needs to be kept in memory while it's shown) */
-extern json_value *json;
+extern json_value *json[MAX_PAGES];
 
 /* User ID of this program */
 extern Word myUserID;

diskbrowser.rez

@@ -123,14 +123,14 @@ resource rPString (forAnyAppleIIRadio) {"Any Apple II"};
 
 resource rControlTemplate (disksList) {
     disksList,                          /* control ID */
-    {45, 10, 147, 410},                 /* control rect */
+    {45, 10, 147, 386},                 /* control rect */
     ListControl {{
-        $0007,                          /* flags */
+        $0000,                          /* flags */
         $1400,                          /* more flags */
         0,                              /* refcon */
         0,                              /* list size */
         10,                              /* List View */
-        $0000,                          /* List Type */
+        $0003,                          /* List Type */
         0,                              /* List Start */
         10,                             /* ListMemHeight */
         13,                             /* List Mem Size */

diskmount.c

@@ -24,6 +24,7 @@
 #include "diskbrowser.h"
 #include "diskmount.h"
 #include "browserutil.h"
+#include "disksearch.h"
 
 /* Item ID and file extension for the disk image we want to open */
 static char *wantedExt;
@@ -50,6 +51,11 @@ void DoMount(void) {
     }
     itemNumber--;
     
+    if (diskList[itemNumber].memPtr == moreResultsString) {
+        DoSearch(true);
+        return;
+    }
+    
     if (diskList[itemNumber].idPtr == NULL) {
         result = 2;
         goto errorReturn;

disksearch.c

@@ -8,8 +8,10 @@
 
 #include <control.h>
 #include <list.h>
+#include <misctool.h>
 #include <quickdraw.h>
 #include <qdaux.h>
+#include <window.h>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -24,22 +26,47 @@
 #include "disksearch.h"
 #include "browserutil.h"
 
-/* Current position in disk list */
-static int diskListPos = 0;
+/* Rectangle of the disk list control */
+static Rect diskListRect = {45, 10, 147, 386};
+
+/* Current length in disk list */
+static int diskListLength = 0;
+
+/* Number of current page of results from server */
+int pageNum;
 
 static boolean processDoc(json_value *docObj);
 static char *EncodeQueryString(char *queryString);
 
+struct diskListEntry moreResultsEntry = {moreResultsString , 0, "", ""};
+
+static void InsertDiskListEntry(struct diskListEntry *entry);
+
 /* Do a search */
-void DoSearch(void) {
+void DoSearch(boolean getMore) {
     static char queryBuf[257];
+    static boolean gsDisksOnly = true; /* User preference: IIGS disks only? */
 
     char *searchURL = NULL;
     enum NetDiskError result = 0;
 
+    int initialDiskListLength = diskListLength;
+
     WaitCursor();
 
-    GetLETextByID(window, searchLine, (StringPtr)&queryBuf);
+    if (!getMore) {
+        FreeJSON();
+        GetLETextByID(window, searchLine, (StringPtr)&queryBuf);
+        gsDisksOnly = (FindRadioButton(window, 2) == 0);
+        pageNum = 0;
+    } else {
+        if (pageNum >= MAX_PAGES - 1) {
+            InitCursor();
+            SysBeep();
+            return;
+        }
+        pageNum++;
+    }
 
     char *queryString = EncodeQueryString(queryBuf+1);
     if (queryString == NULL) {
@@ -56,8 +83,8 @@ void DoSearch(void) {
              "&rows=%i&page=%i&output=json", 
              gsDisksOnly ? "apple2gs" : "apple2%2A", 
              queryString,
-             DISK_LIST_LENGTH,
-             /*pageNum*/ 0);
+             PAGE_SIZE,
+             pageNum + 1);
     if (searchURL == NULL) {
         result = URL_TOO_LONG;
         goto errorReturn;
@@ -65,19 +92,25 @@ void DoSearch(void) {
     free(queryString);
     queryString = NULL;
 
-    if (json)
-        json_value_free(json);
-    result = ReadJSONFromURL(searchURL, &json);
+    if (!getMore) {
+        FreeJSON();
+    }
+    result = ReadJSONFromURL(searchURL, &json[pageNum]);
     if (result != OPERATION_SUCCESSFUL)
         goto errorReturn;
 
-    json_value *response = findEntryInObject(json, "response", json_object);
+    json_value *response = 
+        findEntryInObject(json[pageNum], "response", json_object);
     if (response == NULL) {
         result = NOT_EXPECTED_CONTENTS;
         goto errorReturn;
     }
 
-    diskListPos = 0;
+    if (!getMore) {
+        diskListLength = 0;
+    } else {
+        diskListLength--;
+    }
     json_value *docs = findEntryInObject(response, "docs", json_array);
     if (docs == NULL) {
         result = NOT_EXPECTED_CONTENTS;
@@ -85,9 +118,14 @@ void DoSearch(void) {
     }
     processArray(docs, json_object, processDoc);
     
-    diskList[0].memFlag = 0x80;
-    for (int i = 1; i < DISK_LIST_LENGTH; i++) {
-        diskList[i].memFlag = 0;
+    if (!getMore) {
+        diskList[0].memFlag = 0x80;
+    }
+    
+    json_value *numFoundValue = 
+        findEntryInObject(response, "numFound", json_integer);
+    if (numFoundValue != NULL && numFoundValue->u.integer > diskListLength) {
+        InsertDiskListEntry(&moreResultsEntry);
     }
 
     /* Update state of controls once disk list is available */
@@ -97,9 +135,16 @@ void DoSearch(void) {
         disksListHandle);
     
     NewList2(NULL, 1, (Ref) diskList, refIsPointer, 
-             diskListPos, (Handle)disksListHandle);
+             diskListLength, (Handle)disksListHandle);
 
-    if (diskListPos > 0) {
+    if (getMore) {
+        if (diskListLength >= initialDiskListLength) {
+            SelectMember2(initialDiskListLength, (Handle)disksListHandle);
+            ValidRect(&diskListRect);
+        }
+    }
+
+    if (diskListLength > 0) {
         if (FindTargetCtl() != disksListHandle) {
             MakeThisCtlTarget(disksListHandle);
             CallCtlDefProc(disksListHandle, ctlChangeTarget, 0);
@@ -119,7 +164,7 @@ errorReturn:
 }
 
 static boolean processDoc(json_value *docObj) {
-    if (diskListPos >= DISK_LIST_LENGTH)
+    if (diskListLength >= DISK_LIST_MAX_LENGTH)
         return false;
 
     if (docObj == NULL || docObj->type != json_object)
@@ -129,10 +174,11 @@ static boolean processDoc(json_value *docObj) {
     json_value *ext = findEntryInObject(docObj, "emulator_ext", json_string);
     if (id == NULL || title == NULL || ext == NULL)
         return true;
-    diskList[diskListPos].idPtr = id->u.string.ptr;
+    diskList[diskListLength].idPtr = id->u.string.ptr;
     // TODO character set translation
-    diskList[diskListPos].memPtr = title->u.string.ptr;
-    diskList[diskListPos++].extPtr = ext->u.string.ptr;
+    diskList[diskListLength].memPtr = title->u.string.ptr;
+    diskList[diskListLength].extPtr = ext->u.string.ptr;
+    diskList[diskListLength++].memFlag = 0;
     return true;
 }
 
@@ -164,3 +210,20 @@ static char *EncodeQueryString(char *queryString) {
     *s = '\0';
     return encodedStr;
 }
+
+static void InsertDiskListEntry(struct diskListEntry *entry) {
+    if (diskListLength >= DISK_LIST_MAX_LENGTH)
+        return;
+        
+    diskList[diskListLength++] = *entry;
+}
+
+void FreeJSON(void) {
+    for (int i = 0; i < MAX_PAGES; i++) {
+        if (json[i] != NULL) {
+            json_value_free(json[i]);
+            json[i] = NULL;
+        }
+    }
+}
+

disksearch.h

@@ -1,6 +1,7 @@
 #ifndef DISKSEARCH_H
 #define DISKSEARCH_H
 
-void DoSearch(void);
+void DoSearch(boolean getMore);
+void FreeJSON(void);
 
 #endif